4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Randy Dunlap rdunlap@infradead.org

commit 68e76e034b6b1c1ce2eece1ab8ae4008e14be470 upstream.

I regularly get 50 MB - 60 MB files during kernel randconfig builds. These large files mostly contain (many repeats of; e.g., 124,594):

In file included from ../include/linux/string.h:6:0, from ../include/linux/uuid.h:20, from ../include/linux/mod_devicetable.h:13, from ../scripts/mod/devicetable-offsets.c:3: ../include/linux/compiler.h:64:4: warning: '______f' is static but declared in inline function 'strcpy' which is not static [enabled by default] ______f = { \ ^ ../include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if' ^ ../include/linux/string.h:425:2: note: in expansion of macro 'if' if (p_size == (size_t)-1 && q_size == (size_t)-1) ^

This only happens when CONFIG_FORTIFY_SOURCE=y and CONFIG_PROFILE_ALL_BRANCHES=y, so prevent PROFILE_ALL_BRANCHES if FORTIFY_SOURCE=y.

Link: http://lkml.kernel.org/r/9199446b-a141-c0c3-9678-a3f9107f2750@infradead.org

Signed-off-by: Randy Dunlap rdunlap@infradead.org Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Cc: Arnd Bergmann arnd@arndb.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- kernel/trace/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -343,7 +343,7 @@ config PROFILE_ANNOTATED_BRANCHES on if you need to profile the system's use of these macros.

config PROFILE_ALL_BRANCHES - bool "Profile all if conditionals" + bool "Profile all if conditionals" if !FORTIFY_SOURCE select TRACE_BRANCH_PROFILING help This tracer profiles all branch conditions. Every if ()

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Jack Morgenstein jackm@dev.mellanox.co.il

commit f23a5350e43c810ca36b26d4ed4ecd9a08686f47 upstream.

The ib_write_umad() is protected by taking the umad file mutex. However, it accesses file->port->ib_dev -- which is protected only by the port's mutex (field file_mutex).

The ib_umad_remove_one() calls ib_umad_kill_port() which sets port->ib_dev to NULL under the port mutex (NOT the file mutex). It then sets the mad agent to "dead" under the umad file mutex.

This is a race condition -- because there is a window where port->ib_dev is NULL, while the agent is not "dead".

As a result, we saw stack traces like:

[16490.678059] BUG: unable to handle kernel NULL pointer dereference at 00000000000000b0 [16490.678246] IP: ib_umad_write+0x29c/0xa3a [ib_umad] [16490.678333] PGD 0 P4D 0 [16490.678404] Oops: 0000 [#1] SMP PTI [16490.678466] Modules linked in: rdma_ucm(OE) ib_ucm(OE) rdma_cm(OE) iw_cm(OE) ib_ipoib(OE) ib_cm(OE) ib_uverbs(OE) ib_umad(OE) mlx4_en(OE) ptp pps_core mlx4_ib(OE-) ib_core(OE) mlx4_core(OE) mlx_compat (OE) memtrack(OE) devlink mst_pciconf(OE) mst_pci(OE) netconsole nfsv3 nfs_acl nfs lockd grace fscache cfg80211 rfkill esp6_offload esp6 esp4_offload esp4 sunrpc kvm_intel kvm ppdev parport_pc irqbypass parport joydev i2c_piix4 virtio_balloon cirrus drm_kms_helper ttm drm e1000 serio_raw virtio_pci virtio_ring virtio ata_generic pata_acpi qemu_fw_cfg [last unloaded: mlxfw] [16490.679202] CPU: 4 PID: 3115 Comm: sminfo Tainted: G OE 4.14.13-300.fc27.x86_64 #1 [16490.679339] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu2 04/01/2014 [16490.679477] task: ffff9cf753890000 task.stack: ffffaf70c26b0000 [16490.679571] RIP: 0010:ib_umad_write+0x29c/0xa3a [ib_umad] [16490.679664] RSP: 0018:ffffaf70c26b3d90 EFLAGS: 00010202 [16490.679747] RAX: 0000000000000010 RBX: ffff9cf75610fd80 RCX: 0000000000000000 [16490.679856] RDX: 0000000000000001 RSI: 00007ffdf2bfd714 RDI: ffff9cf6bb2a9c00

In the above trace, ib_umad_write is trying to dereference the NULL file->port->ib_dev pointer.

Fix this by using the agent's device pointer (the device field in struct ib_mad_agent) -- which IS protected by the umad file mutex.

Fixes: 44c58487d51a ("IB/core: Define 'ib' and 'roce' rdma_ah_attr types") Signed-off-by: Jack Morgenstein jackm@dev.mellanox.co.il Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/infiniband/core/user_mad.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/core/user_mad.c +++ b/drivers/infiniband/core/user_mad.c @@ -500,7 +500,7 @@ static ssize_t ib_umad_write(struct file }

memset(&ah_attr, 0, sizeof ah_attr); - ah_attr.type = rdma_ah_find_type(file->port->ib_dev, + ah_attr.type = rdma_ah_find_type(agent->device, file->port->port_num); rdma_ah_set_dlid(&ah_attr, be16_to_cpu(packet->mad.hdr.lid)); rdma_ah_set_sl(&ah_attr, packet->mad.hdr.sl);

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Jack Morgenstein jackm@dev.mellanox.co.il

commit 852f6927594d0d3e8632c889b2ab38cbc46476ad upstream.

Allocating steerable UD QPs depends on having at least one IB port, while releasing those QPs does not.

As a result, when there are only ETH ports, the IB (RoCE) driver requests releasing a qp range whose base qp is zero, with qp count zero.

When SR-IOV is enabled, and the VF driver is running on a VM over a hypervisor which treats such qp release calls as errors (rather than NOPs), we see lines in the VM message log like:

mlx4_core 0002:00:02.0: Failed to release qp range base:0 cnt:0

Fix this by adding a check for a zero count in mlx4_release_qp_range() (which thus treats releasing 0 qps as a nop), and eliminating the check for device managed flow steering when releasing steerable UD QPs. (Freeing ib_uc_qpns_bitmap unconditionally is also OK, since it remains NULL when steerable UD QPs are not allocated).

Fixes: 4196670be786 ("IB/mlx4: Don't allocate range of steerable UD QPs for Ethernet-only device") Signed-off-by: Jack Morgenstein jackm@dev.mellanox.co.il Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/infiniband/hw/mlx4/main.c | 13 +++++-------- drivers/net/ethernet/mellanox/mlx4/qp.c | 3 +++ 2 files changed, 8 insertions(+), 8 deletions(-)

--- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -2972,9 +2972,8 @@ err_steer_free_bitmap: kfree(ibdev->ib_uc_qpns_bitmap);

err_steer_qp_release: - if (ibdev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED) - mlx4_qp_release_range(dev, ibdev->steer_qpn_base, - ibdev->steer_qpn_count); + mlx4_qp_release_range(dev, ibdev->steer_qpn_base, + ibdev->steer_qpn_count); err_counter: for (i = 0; i < ibdev->num_ports; ++i) mlx4_ib_delete_counters_table(ibdev, &ibdev->counters_table[i]); @@ -3079,11 +3078,9 @@ static void mlx4_ib_remove(struct mlx4_d ibdev->iboe.nb.notifier_call = NULL; }

- if (ibdev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED) { - mlx4_qp_release_range(dev, ibdev->steer_qpn_base, - ibdev->steer_qpn_count); - kfree(ibdev->ib_uc_qpns_bitmap); - } + mlx4_qp_release_range(dev, ibdev->steer_qpn_base, + ibdev->steer_qpn_count); + kfree(ibdev->ib_uc_qpns_bitmap);

iounmap(ibdev->uar_map); for (p = 0; p < ibdev->num_ports; ++p) --- a/drivers/net/ethernet/mellanox/mlx4/qp.c +++ b/drivers/net/ethernet/mellanox/mlx4/qp.c @@ -287,6 +287,9 @@ void mlx4_qp_release_range(struct mlx4_d u64 in_param = 0; int err;

+ if (!cnt) + return; + if (mlx4_is_mfunc(dev)) { set_param_l(&in_param, base_qpn); set_param_h(&in_param, cnt);

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Bodong Wang bodong@mellanox.com

commit cd2a6e7d384b043d5d029e39663061cebc949385 upstream.

The change of slid from u16 to u32 results in sizeof(struct ib_wc) cross 64B boundary, which causes more cache misses. This patch rearranges the fields and remain the size to 64B.

Pahole output before this change:

struct ib_wc { union { u64 wr_id; /* 8 */ struct ib_cqe * wr_cqe; /* 8 */ }; /* 0 8 */ enum ib_wc_status status; /* 8 4 */ enum ib_wc_opcode opcode; /* 12 4 */ u32 vendor_err; /* 16 4 */ u32 byte_len; /* 20 4 */ struct ib_qp * qp; /* 24 8 */ union { __be32 imm_data; /* 4 */ u32 invalidate_rkey; /* 4 */ } ex; /* 32 4 */ u32 src_qp; /* 36 4 */ int wc_flags; /* 40 4 */ u16 pkey_index; /* 44 2 */

/* XXX 2 bytes hole, try to pack */

u32 slid; /* 48 4 */ u8 sl; /* 52 1 */ u8 dlid_path_bits; /* 53 1 */ u8 port_num; /* 54 1 */ u8 smac[6]; /* 55 6 */

/* XXX 1 byte hole, try to pack */

u16 vlan_id; /* 62 2 */ /* --- cacheline 1 boundary (64 bytes) --- */ u8 network_hdr_type; /* 64 1 */

/* size: 72, cachelines: 2, members: 17 */ /* sum members: 62, holes: 2, sum holes: 3 */ /* padding: 7 */ /* last cacheline: 8 bytes */ };

Pahole output after this change:

struct ib_wc { union { u64 wr_id; /* 8 */ struct ib_cqe * wr_cqe; /* 8 */ }; /* 0 8 */ enum ib_wc_status status; /* 8 4 */ enum ib_wc_opcode opcode; /* 12 4 */ u32 vendor_err; /* 16 4 */ u32 byte_len; /* 20 4 */ struct ib_qp * qp; /* 24 8 */ union { __be32 imm_data; /* 4 */ u32 invalidate_rkey; /* 4 */ } ex; /* 32 4 */ u32 src_qp; /* 36 4 */ u32 slid; /* 40 4 */ int wc_flags; /* 44 4 */ u16 pkey_index; /* 48 2 */ u8 sl; /* 50 1 */ u8 dlid_path_bits; /* 51 1 */ u8 port_num; /* 52 1 */ u8 smac[6]; /* 53 6 */

/* XXX 1 byte hole, try to pack */

u16 vlan_id; /* 60 2 */ u8 network_hdr_type; /* 62 1 */

/* size: 64, cachelines: 1, members: 17 */ /* sum members: 62, holes: 1, sum holes: 1 */ /* padding: 1 */ };

Fixes: 7db20ecd1d97 ("IB/core: Change wc.slid from 16 to 32 bits") Signed-off-by: Bodong Wang bodong@mellanox.com Reviewed-by: Parav Pandit parav@mellanox.com Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- include/rdma/ib_verbs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -971,9 +971,9 @@ struct ib_wc { u32 invalidate_rkey; } ex; u32 src_qp; + u32 slid; int wc_flags; u16 pkey_index; - u32 slid; u8 sl; u8 dlid_path_bits; u8 port_num; /* valid only for DR SMPs on switches */

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Anders Roxell anders.roxell@linaro.org

commit 912ec316686df352028afb6efec59e47a958a24d upstream.

aarch64-linux-gnu-gcc -Wl,-no-as-needed -Wall -lpthread seccomp_bpf.c -o seccomp_bpf seccomp_bpf.c: In function 'tracer_ptrace': seccomp_bpf.c:1720:12: error: '__NR_open' undeclared (first use in this function) if (nr == __NR_open) ^~~~~~~~~ seccomp_bpf.c:1720:12: note: each undeclared identifier is reported only once for each function it appears in In file included from seccomp_bpf.c:48:0: seccomp_bpf.c: In function 'TRACE_syscall_ptrace_syscall_dropped': seccomp_bpf.c:1795:39: error: '__NR_open' undeclared (first use in this function) EXPECT_SYSCALL_RETURN(EPERM, syscall(__NR_open)); ^ open(2) is a legacy syscall, replaced with openat(2) since 2.6.16. Thus new architectures in the kernel, such as arm64, don't implement these legacy syscalls.

Fixes: a33b2d0359a0 ("selftests/seccomp: Add tests for basic ptrace actions") Signed-off-by: Anders Roxell anders.roxell@linaro.org Tested-by: Naresh Kamboju naresh.kamboju@linaro.org Cc: stable@vger.kernel.org Acked-by: Kees Cook keescook@chromium.org Signed-off-by: Shuah Khan shuahkh@osg.samsung.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- tools/testing/selftests/seccomp/seccomp_bpf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/tools/testing/selftests/seccomp/seccomp_bpf.c +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c @@ -1717,7 +1717,7 @@ void tracer_ptrace(struct __test_metadat

if (nr == __NR_getpid) change_syscall(_metadata, tracee, __NR_getppid); - if (nr == __NR_open) + if (nr == __NR_openat) change_syscall(_metadata, tracee, -1); }

@@ -1792,7 +1792,7 @@ TEST_F(TRACE_syscall, ptrace_syscall_dro true);

/* Tracer should skip the open syscall, resulting in EPERM. */ - EXPECT_SYSCALL_RETURN(EPERM, syscall(__NR_open)); + EXPECT_SYSCALL_RETURN(EPERM, syscall(__NR_openat)); }

TEST_F(TRACE_syscall, syscall_allowed)

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Bart Van Assche bart.vanassche@wdc.com

commit 6f301e06de4cf9ab7303f5acd43e64fcd4aa04be upstream.

The following sequence: * Change queue pair state into IB_QPS_ERR. * Post a work request on the queue pair.

Triggers the following race condition in the rdma_rxe driver: * rxe_qp_error() triggers an asynchronous call of rxe_completer(), the function that examines the QP send queue. * rxe_post_send() posts a work request on the QP send queue.

If rxe_completer() runs prior to rxe_post_send(), it will drain the send queue and the driver will assume no further action is necessary. However, once we post the send to the send queue, because the queue is in error, no send completion will ever happen and the send will get stuck. In order to process the send, we need to make sure that rxe_completer() gets run after a send is posted to a queue pair in an error state. This patch ensures that happens.

Signed-off-by: Bart Van Assche bart.vanassche@wdc.com Cc: Moni Shoua monis@mellanox.com Cc: stable@vger.kernel.org # v4.8 Signed-off-by: Doug Ledford dledford@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/infiniband/sw/rxe/rxe_verbs.c | 2 ++ 1 file changed, 2 insertions(+)

--- a/drivers/infiniband/sw/rxe/rxe_verbs.c +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c @@ -813,6 +813,8 @@ static int rxe_post_send_kernel(struct r (queue_count(qp->sq.queue) > 1);

rxe_run_task(&qp->req.task, must_sched); + if (unlikely(qp->req.state == QP_STATE_ERROR)) + rxe_run_task(&qp->comp.task, 1);

return err; }

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Bart Van Assche bart.vanassche@wdc.com

commit bb3ffb7ad48a21e98a5c64eb21103a74fd9f03f6 upstream.

rxe_qp_cleanup() can sleep so it must be run in thread context and not in atomic context. This patch avoids that the following bug is triggered:

Kernel BUG at 00000000560033f3 [verbose debug info unavailable] BUG: sleeping function called from invalid context at net/core/sock.c:2761 in_atomic(): 1, irqs_disabled(): 0, pid: 7, name: ksoftirqd/0 INFO: lockdep is turned off. Preemption disabled at: [<00000000b6e69628>] __do_softirq+0x4e/0x540 CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.15.0-rc7-dbg+ #4 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014 Call Trace: dump_stack+0x85/0xbf ___might_sleep+0x177/0x260 lock_sock_nested+0x1d/0x90 inet_shutdown+0x2e/0xd0 rxe_qp_cleanup+0x107/0x140 [rdma_rxe] rxe_elem_release+0x18/0x80 [rdma_rxe] rxe_requester+0x1cf/0x11b0 [rdma_rxe] rxe_do_task+0x78/0xf0 [rdma_rxe] tasklet_action+0x99/0x270 __do_softirq+0xc0/0x540 run_ksoftirqd+0x1c/0x70 smpboot_thread_fn+0x1be/0x270 kthread+0x117/0x130 ret_from_fork+0x24/0x30

Signed-off-by: Bart Van Assche bart.vanassche@wdc.com Cc: Moni Shoua monis@mellanox.com Signed-off-by: Doug Ledford dledford@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/infiniband/sw/rxe/rxe_qp.c | 12 ++++++++++-- drivers/infiniband/sw/rxe/rxe_verbs.h | 3 +++ 2 files changed, 13 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/sw/rxe/rxe_qp.c +++ b/drivers/infiniband/sw/rxe/rxe_qp.c @@ -824,9 +824,9 @@ void rxe_qp_destroy(struct rxe_qp *qp) }

/* called when the last reference to the qp is dropped */ -void rxe_qp_cleanup(struct rxe_pool_entry *arg) +static void rxe_qp_do_cleanup(struct work_struct *work) { - struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem); + struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);

rxe_drop_all_mcast_groups(qp);

@@ -859,3 +859,11 @@ void rxe_qp_cleanup(struct rxe_pool_entr kernel_sock_shutdown(qp->sk, SHUT_RDWR); sock_release(qp->sk); } + +/* called when the last reference to the qp is dropped */ +void rxe_qp_cleanup(struct rxe_pool_entry *arg) +{ + struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem); + + execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work); +} --- a/drivers/infiniband/sw/rxe/rxe_verbs.h +++ b/drivers/infiniband/sw/rxe/rxe_verbs.h @@ -35,6 +35,7 @@ #define RXE_VERBS_H

#include <linux/interrupt.h> +#include <linux/workqueue.h> #include <rdma/rdma_user_rxe.h> #include "rxe_pool.h" #include "rxe_task.h" @@ -281,6 +282,8 @@ struct rxe_qp { struct timer_list rnr_nak_timer;

spinlock_t state_lock; /* guard requester and completer */ + + struct execute_work cleanup_work; };

enum rxe_mem_state {

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Bjorn Andersson bjorn.andersson@linaro.org

commit d1bf2d30728f310f72296b54f0651ecdb09cbb12 upstream.

Propagate the error of devfreq_add_device() in devm_devfreq_add_device() rather than statically returning ENOMEM. This makes it slightly faster to pinpoint the cause of a returned error.

Fixes: 8cd84092d35e ("PM / devfreq: Add resource-managed function for devfreq device") Cc: stable@vger.kernel.org Acked-by: Chanwoo Choi cw00.choi@samsung.com Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org Signed-off-by: MyungJoo Ham myungjoo.ham@samsung.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/devfreq/devfreq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -676,7 +676,7 @@ struct devfreq *devm_devfreq_add_device( devfreq = devfreq_add_device(dev, profile, governor_name, data); if (IS_ERR(devfreq)) { devres_free(ptr); - return ERR_PTR(-ENOMEM); + return devfreq; }

*ptr = devfreq;

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Gang He ghe@suse.com

commit ff26cc10aec128c3f86b5611fd5f59c71d49c0e3 upstream.

If we can't get inode lock immediately in the function ocfs2_inode_lock_with_page() when reading a page, we should not return directly here, since this will lead to a softlockup problem when the kernel is configured with CONFIG_PREEMPT is not set. The method is to get a blocking lock and immediately unlock before returning, this can avoid CPU resource waste due to lots of retries, and benefits fairness in getting lock among multiple nodes, increase efficiency in case modifying the same file frequently from multiple nodes.

The softlockup crash (when set /proc/sys/kernel/softlockup_panic to 1) looks like:

Kernel panic - not syncing: softlockup: hung tasks CPU: 0 PID: 885 Comm: multi_mmap Tainted: G L 4.12.14-6.1-default #1 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Call Trace: <IRQ> dump_stack+0x5c/0x82 panic+0xd5/0x21e watchdog_timer_fn+0x208/0x210 __hrtimer_run_queues+0xcc/0x200 hrtimer_interrupt+0xa6/0x1f0 smp_apic_timer_interrupt+0x34/0x50 apic_timer_interrupt+0x96/0xa0 </IRQ> RIP: 0010:unlock_page+0x17/0x30 RSP: 0000:ffffaf154080bc88 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dead000000000100 RBX: fffff21e009f5300 RCX: 0000000000000004 RDX: dead0000000000ff RSI: 0000000000000202 RDI: fffff21e009f5300 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffaf154080bb00 R10: ffffaf154080bc30 R11: 0000000000000040 R12: ffff993749a39518 R13: 0000000000000000 R14: fffff21e009f5300 R15: fffff21e009f5300 ocfs2_inode_lock_with_page+0x25/0x30 [ocfs2] ocfs2_readpage+0x41/0x2d0 [ocfs2] filemap_fault+0x12b/0x5c0 ocfs2_fault+0x29/0xb0 [ocfs2] __do_fault+0x1a/0xa0 __handle_mm_fault+0xbe8/0x1090 handle_mm_fault+0xaa/0x1f0 __do_page_fault+0x235/0x4b0 trace_do_page_fault+0x3c/0x110 async_page_fault+0x28/0x30 RIP: 0033:0x7fa75ded638e RSP: 002b:00007ffd6657db18 EFLAGS: 00010287 RAX: 000055c7662fb700 RBX: 0000000000000001 RCX: 000055c7662fb700 RDX: 0000000000001770 RSI: 00007fa75e909000 RDI: 000055c7662fb700 RBP: 0000000000000003 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000483 R11: 00007fa75ded61b0 R12: 00007fa75e90a770 R13: 000000000000000e R14: 0000000000001770 R15: 0000000000000000

About performance improvement, we can see the testing time is reduced, and CPU utilization decreases, the detailed data is as follows. I ran multi_mmap test case in ocfs2-test package in a three nodes cluster.

Before applying this patch: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2754 ocfs2te+ 20 0 170248 6980 4856 D 80.73 0.341 0:18.71 multi_mmap 1505 root rt 0 222236 123060 97224 S 2.658 6.015 0:01.44 corosync 5 root 20 0 0 0 0 S 1.329 0.000 0:00.19 kworker/u8:0 95 root 20 0 0 0 0 S 1.329 0.000 0:00.25 kworker/u8:1 2728 root 20 0 0 0 0 S 0.997 0.000 0:00.24 jbd2/sda1-33 2721 root 20 0 0 0 0 S 0.664 0.000 0:00.07 ocfs2dc-3C8CFD4 2750 ocfs2te+ 20 0 142976 4652 3532 S 0.664 0.227 0:00.28 mpirun

ocfs2test@tb-node2:~>multiple_run.sh -i ens3 -k ~/linux-4.4.21-69.tar.gz -o ~/ocfs2mullog -C hacluster -s pcmk -n tb-node2,tb-node1,tb-node3 -d /dev/sda1 -b 4096 -c 32768 -t multi_mmap /mnt/shared Tests with "-b 4096 -C 32768" Thu Dec 28 14:44:52 CST 2017 multi_mmap..................................................Passed. Runtime 783 seconds.

After apply this patch:

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2508 ocfs2te+ 20 0 170248 6804 4680 R 54.00 0.333 0:55.37 multi_mmap 155 root 20 0 0 0 0 S 2.667 0.000 0:01.20 kworker/u8:3 95 root 20 0 0 0 0 S 2.000 0.000 0:01.58 kworker/u8:1 2504 ocfs2te+ 20 0 142976 4604 3480 R 1.667 0.225 0:01.65 mpirun 5 root 20 0 0 0 0 S 1.000 0.000 0:01.36 kworker/u8:0 2482 root 20 0 0 0 0 S 1.000 0.000 0:00.86 jbd2/sda1-33 299 root 0 -20 0 0 0 S 0.333 0.000 0:00.13 kworker/2:1H 335 root 0 -20 0 0 0 S 0.333 0.000 0:00.17 kworker/1:1H 535 root 20 0 12140 7268 1456 S 0.333 0.355 0:00.34 haveged 1282 root rt 0 222284 123108 97224 S 0.333 6.017 0:01.33 corosync

ocfs2test@tb-node2:~>multiple_run.sh -i ens3 -k ~/linux-4.4.21-69.tar.gz -o ~/ocfs2mullog -C hacluster -s pcmk -n tb-node2,tb-node1,tb-node3 -d /dev/sda1 -b 4096 -c 32768 -t multi_mmap /mnt/shared Tests with "-b 4096 -C 32768" Thu Dec 28 15:04:12 CST 2017 multi_mmap..................................................Passed. Runtime 487 seconds.

Link: http://lkml.kernel.org/r/1514447305-30814-1-git-send-email-ghe@suse.com Fixes: 1cce4df04f37 ("ocfs2: do not lock/unlock() inode DLM lock") Signed-off-by: Gang He ghe@suse.com Reviewed-by: Eric Ren zren@suse.com Acked-by: alex chen alex.chen@huawei.com Acked-by: piaojun piaojun@huawei.com Cc: Mark Fasheh mfasheh@versity.com Cc: Joel Becker jlbec@evilplan.org Cc: Junxiao Bi junxiao.bi@oracle.com Cc: Joseph Qi jiangqi903@gmail.com Cc: Changwei Ge ge.changwei@h3c.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- fs/ocfs2/dlmglue.c | 9 +++++++++ 1 file changed, 9 insertions(+)

--- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -2486,6 +2486,15 @@ int ocfs2_inode_lock_with_page(struct in ret = ocfs2_inode_lock_full(inode, ret_bh, ex, OCFS2_LOCK_NONBLOCK); if (ret == -EAGAIN) { unlock_page(page); + /* + * If we can't get inode lock immediately, we should not return + * directly here, since this will lead to a softlockup problem. + * The method is to get a blocking lock and immediately unlock + * before returning, this can avoid CPU resource waste due to + * lots of retries, and benefits fairness in getting lock. + */ + if (ocfs2_inode_lock(inode, ret_bh, ex) == 0) + ocfs2_inode_unlock(inode, ex); ret = AOP_TRUNCATED_PAGE; }

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Nathan Fontenot nfont@linux.vnet.ibm.com

commit 1d9a090783bef19fe8cdec878620d22f05191316 upstream.

When DLPAR removing a CPU, the unmapping of the cpu from a node in unmap_cpu_from_node() should also invalidate the CPUs entry in the numa_cpu_lookup_table. There is not a guarantee that on a subsequent DLPAR add of the CPU the associativity will be the same and thus could be in a different node. Invalidating the entry in the numa_cpu_lookup_table causes the associativity to be read from the device tree at the time of the add.

The current behavior of not invalidating the CPUs entry in the numa_cpu_lookup_table can result in scenarios where the the topology layout of CPUs in the partition does not match the device tree or the topology reported by the HMC.

This bug looks like it was introduced in 2004 in the commit titled "ppc64: cpu hotplug notifier for numa", which is 6b15e4e87e32 in the linux-fullhist tree. Hence tag it for all stable releases.

Cc: stable@vger.kernel.org Signed-off-by: Nathan Fontenot nfont@linux.vnet.ibm.com Reviewed-by: Tyrel Datwyler tyreld@linux.vnet.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/powerpc/include/asm/topology.h | 5 +++++ arch/powerpc/mm/numa.c | 5 ----- arch/powerpc/platforms/pseries/hotplug-cpu.c | 2 ++ 3 files changed, 7 insertions(+), 5 deletions(-)

--- a/arch/powerpc/include/asm/topology.h +++ b/arch/powerpc/include/asm/topology.h @@ -44,6 +44,11 @@ extern int sysfs_add_device_to_node(stru extern void sysfs_remove_device_from_node(struct device *dev, int nid); extern int numa_update_cpu_topology(bool cpus_locked);

+static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) +{ + numa_cpu_lookup_table[cpu] = node; +} + static inline int early_cpu_to_node(int cpu) { int nid; --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -142,11 +142,6 @@ static void reset_numa_cpu_lookup_table( numa_cpu_lookup_table[cpu] = -1; }

-static void update_numa_cpu_lookup_table(unsigned int cpu, int node) -{ - numa_cpu_lookup_table[cpu] = node; -} - static void map_cpu_to_node(int cpu, int node) { update_numa_cpu_lookup_table(cpu, node); --- a/arch/powerpc/platforms/pseries/hotplug-cpu.c +++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c @@ -36,6 +36,7 @@ #include <asm/xics.h> #include <asm/xive.h> #include <asm/plpar_wrappers.h> +#include <asm/topology.h>

#include "pseries.h" #include "offline_states.h" @@ -331,6 +332,7 @@ static void pseries_remove_processor(str BUG_ON(cpu_online(cpu)); set_cpu_present(cpu, false); set_hard_smp_processor_id(cpu, -1); + update_numa_cpu_lookup_table(cpu, -1); break; } if (cpu >= nr_cpu_ids)

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Benjamin Herrenschmidt benh@kernel.crashing.org

commit f23ab3efb1b30cc5c5ef5ae4ef294ed467f30675 upstream.

Commit 398a719d34a1 ("powerpc/mm: Update bits used to skip hash_page") mistakenly dropped the DSISR_DABRMATCH bit from the mask of bit tested to skip trying to hash a page.

As a result, the DABR matches would no longer be detected.

This adds it back. We open code it in the 2 places where it matters rather than fold it into DSISR_BAD_FAULT_32S/64S because this isn't technically a bad fault and while we would never hit it with the current code, I prefer if page_fault_is_bad() didn't trigger on these.

Fixes: 398a719d34a1 ("powerpc/mm: Update bits used to skip hash_page") Cc: stable@vger.kernel.org # v4.14 Tested-by: Pedro Miraglia Franco de Carvalho pedromfc@br.ibm.com Signed-off-by: Benjamin Herrenschmidt benh@kernel.crashing.org Signed-off-by: Naveen N. Rao naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/powerpc/kernel/exceptions-64s.S | 2 +- arch/powerpc/kernel/head_32.S | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -1617,7 +1617,7 @@ USE_TEXT_SECTION() .balign IFETCH_ALIGN_BYTES do_hash_page: #ifdef CONFIG_PPC_STD_MMU_64 - lis r0,DSISR_BAD_FAULT_64S@h + lis r0,(DSISR_BAD_FAULT_64S|DSISR_DABRMATCH)@h ori r0,r0,DSISR_BAD_FAULT_64S@l and. r0,r4,r0 /* weird error? */ bne- handle_page_fault /* if not, try to insert a HPTE */ --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -388,7 +388,7 @@ DataAccess: EXCEPTION_PROLOG mfspr r10,SPRN_DSISR stw r10,_DSISR(r11) - andis. r0,r10,DSISR_BAD_FAULT_32S@h + andis. r0,r10,(DSISR_BAD_FAULT_32S|DSISR_DABRMATCH)@h bne 1f /* if not, try to put a PTE */ mfspr r4,SPRN_DAR /* into the hash table */ rlwinm r3,r10,32-15,21,21 /* DSISR_STORE -> _PAGE_RW */

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Bjorn Andersson bjorn.andersson@linaro.org

commit 566bd8902e7fa20bd412ed753e09e89c1c96939c upstream.

SMSM is not symmetrical, the incoming bits from WCNSS are available at index 6, but the outgoing host id for WCNSS is 3. Further more, upstream references the base of APCS (in contrast to downstream), so the register offset of 8 must be included.

Fixes: 1fb47e0a9ba4 ("arm64: dts: qcom: msm8916: Add smsm and smp2p nodes") Cc: stable@vger.kernel.org Reported-by: Ramon Fried rfried@codeaurora.org Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org Signed-off-by: Andy Gross andy.gross@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/arm64/boot/dts/qcom/msm8916.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi +++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi @@ -1430,8 +1430,8 @@ #address-cells = <1>; #size-cells = <0>;

- qcom,ipc-1 = <&apcs 0 13>; - qcom,ipc-6 = <&apcs 0 19>; + qcom,ipc-1 = <&apcs 8 13>; + qcom,ipc-3 = <&apcs 8 19>;

apps_smsm: apps@0 { reg = <0>;

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Patrice Chotard patrice.chotard@st.com

commit 7ac1f59c09a61e6af6622df6809e003b0af07f3d upstream.

The GPIO polarity is missing in the hdmi,hpd-gpio property, this fixes the following DT warnings:

arch/arm/boot/dts/stih410-b2120.dtb: Warning (gpios_property): hdmi,hpd-gpio property size (8) too small for cell size 2 in /soc/sti-display-subsystem/sti-hdmi@8d04000

arch/arm/boot/dts/stih407-b2120.dtb: Warning (gpios_property): hdmi,hpd-gpio property size (8) too small for cell size 2 in /soc/sti-display-subsystem/sti-hdmi@8d04000

arch/arm/boot/dts/stih410-b2260.dtb: Warning (gpios_property): hdmi,hpd-gpio property size (8) too small for cell size 2 in /soc/sti-display-subsystem/sti-hdmi@8d04000

[arnd: marked Cc:stable since this warning shows up with the latest dtc by default, and is more likely to actually cause problems than the other patches from this series]

Cc: stable@vger.kernel.org Signed-off-by: Patrice Chotard patrice.chotard@st.com Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/arm/boot/dts/stih407.dtsi | 3 ++- arch/arm/boot/dts/stih410.dtsi | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-)

--- a/arch/arm/boot/dts/stih407.dtsi +++ b/arch/arm/boot/dts/stih407.dtsi @@ -8,6 +8,7 @@ */ #include "stih407-clock.dtsi" #include "stih407-family.dtsi" +#include <dt-bindings/gpio/gpio.h> / { soc { sti-display-subsystem { @@ -122,7 +123,7 @@ <&clk_s_d2_quadfs 0>, <&clk_s_d2_quadfs 1>;

- hdmi,hpd-gpio = <&pio5 3>; + hdmi,hpd-gpio = <&pio5 3 GPIO_ACTIVE_LOW>; reset-names = "hdmi"; resets = <&softreset STIH407_HDMI_TX_PHY_SOFTRESET>; ddc = <&hdmiddc>; --- a/arch/arm/boot/dts/stih410.dtsi +++ b/arch/arm/boot/dts/stih410.dtsi @@ -9,6 +9,7 @@ #include "stih410-clock.dtsi" #include "stih407-family.dtsi" #include "stih410-pinctrl.dtsi" +#include <dt-bindings/gpio/gpio.h> / { aliases { bdisp0 = &bdisp0; @@ -213,7 +214,7 @@ <&clk_s_d2_quadfs 0>, <&clk_s_d2_quadfs 1>;

- hdmi,hpd-gpio = <&pio5 3>; + hdmi,hpd-gpio = <&pio5 3 GPIO_ACTIVE_LOW>; reset-names = "hdmi"; resets = <&softreset STIH407_HDMI_TX_PHY_SOFTRESET>; ddc = <&hdmiddc>;

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Sean Wang sean.wang@mediatek.com

commit b96a696fb2a8dd1ee4e6cfee48dcac270fc53287 upstream.

Fix that bananapi-r2 booting from SD-card would fail since incorrect polarity is applied to the previous setup with GPIO_ACTIVE_HIGH.

Cc: stable@vger.kernel.org Fixes: 0eed8d097612 ("arm: dts: mt7623: Add SD-card and EMMC to bananapi-r2") Signed-off-by: Sean Wang sean.wang@mediatek.com Tested-by: Matthias Brugger matthias.bgg@gmail.com Signed-off-by: Matthias Brugger matthias.bgg@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts +++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts @@ -204,7 +204,7 @@ bus-width = <4>; max-frequency = <50000000>; cap-sd-highspeed; - cd-gpios = <&pio 261 0>; + cd-gpios = <&pio 261 GPIO_ACTIVE_LOW>; vmmc-supply = <&mt6323_vmch_reg>; vqmmc-supply = <&mt6323_vio18_reg>; };

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Viresh Kumar viresh.kumar@linaro.org

commit cdd10409914184c7eee5ae3e11beb890c9c16c61 upstream.

The "dmas" cells for the designware DMA controller need to have only 3 properties apart from the phandle: request line, src master and destination master. But the commit 6e8887f60f60 updated it incorrectly while moving from platform code to DT. Fix it.

Cc: stable@vger.kernel.org # v3.10+ Fixes: 6e8887f60f60 ("ARM: SPEAr13xx: Pass generic DW DMAC platform data from DT") Reported-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Viresh Kumar viresh.kumar@linaro.org Signed-off-by: Olof Johansson olof@lixom.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- Documentation/devicetree/bindings/dma/snps-dma.txt | 2 +- arch/arm/boot/dts/spear1340.dtsi | 4 ++-- arch/arm/boot/dts/spear13xx.dtsi | 6 +++--- 3 files changed, 6 insertions(+), 6 deletions(-)

--- a/Documentation/devicetree/bindings/dma/snps-dma.txt +++ b/Documentation/devicetree/bindings/dma/snps-dma.txt @@ -64,6 +64,6 @@ Example: reg = <0xe0000000 0x1000>; interrupts = <0 35 0x4>; dmas = <&dmahost 12 0 1>, - <&dmahost 13 0 1 0>; + <&dmahost 13 1 0>; dma-names = "rx", "rx"; }; --- a/arch/arm/boot/dts/spear1340.dtsi +++ b/arch/arm/boot/dts/spear1340.dtsi @@ -142,8 +142,8 @@ reg = <0xb4100000 0x1000>; interrupts = <0 105 0x4>; status = "disabled"; - dmas = <&dwdma0 0x600 0 0 1>, /* 0xC << 11 */ - <&dwdma0 0x680 0 1 0>; /* 0xD << 7 */ + dmas = <&dwdma0 12 0 1>, + <&dwdma0 13 1 0>; dma-names = "tx", "rx"; };

--- a/arch/arm/boot/dts/spear13xx.dtsi +++ b/arch/arm/boot/dts/spear13xx.dtsi @@ -100,7 +100,7 @@ reg = <0xb2800000 0x1000>; interrupts = <0 29 0x4>; status = "disabled"; - dmas = <&dwdma0 0 0 0 0>; + dmas = <&dwdma0 0 0 0>; dma-names = "data"; };

@@ -290,8 +290,8 @@ #size-cells = <0>; interrupts = <0 31 0x4>; status = "disabled"; - dmas = <&dwdma0 0x2000 0 0 0>, /* 0x4 << 11 */ - <&dwdma0 0x0280 0 0 0>; /* 0x5 << 7 */ + dmas = <&dwdma0 4 0 0>, + <&dwdma0 5 0 0>; dma-names = "tx", "rx"; };

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Lionel Landwerlin lionel.g.landwerlin@intel.com

commit 0890540e21cf1156b4cf960a4c1c734db4e816f9 upstream.

Up to Coffeelake we could deduce this GT number from the device ID. This doesn't seem to be the case anymore. This change reorders pciids per GT and adds a gt field to intel_device_info. We set this field on the following platforms :

- SNB/IVB/HSW/BDW/SKL/KBL/CFL/CNL

Before & After :

$ modinfo drivers/gpu/drm/i915/i915.ko | grep ^alias | wc -l 209

v2: Add SNB & IVB (Chris)

v3: Fix compilation error in early-quirks (Lionel)

v4: Fix inconsistency between FEATURE/PLATFORM macros (Ville)

Signed-off-by: Lionel Landwerlin lionel.g.landwerlin@intel.com Reviewed-by: Chris Wilson chris@chris-wilson.co.uk Link: https://patchwork.freedesktop.org/patch/msgid/20170830161208.29221-2-lionel.... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/gpu/drm/i915/i915_drv.h | 1 drivers/gpu/drm/i915/i915_pci.c | 193 +++++++++++++++++++++++++++++++--------- include/drm/i915_pciids.h | 152 +++++++++++++++++++------------ 3 files changed, 246 insertions(+), 100 deletions(-)

--- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -842,6 +842,7 @@ struct intel_device_info { u8 gen; u16 gen_mask; enum intel_platform platform; + u8 gt; /* GT number, 0 if undefined */ u8 ring_mask; /* Rings supported by the HW */ u8 num_rings; #define DEFINE_FLAG(name) u8 name:1 --- a/drivers/gpu/drm/i915/i915_pci.c +++ b/drivers/gpu/drm/i915/i915_pci.c @@ -224,15 +224,34 @@ static const struct intel_device_info in GEN_DEFAULT_PIPEOFFSETS, \ CURSOR_OFFSETS

-static const struct intel_device_info intel_sandybridge_d_info = { - GEN6_FEATURES, - .platform = INTEL_SANDYBRIDGE, +#define SNB_D_PLATFORM \ + GEN6_FEATURES, \ + .platform = INTEL_SANDYBRIDGE + +static const struct intel_device_info intel_sandybridge_d_gt1_info = { + SNB_D_PLATFORM, + .gt = 1, +}; + +static const struct intel_device_info intel_sandybridge_d_gt2_info = { + SNB_D_PLATFORM, + .gt = 2, +}; + +#define SNB_M_PLATFORM \ + GEN6_FEATURES, \ + .platform = INTEL_SANDYBRIDGE, \ + .is_mobile = 1 + + +static const struct intel_device_info intel_sandybridge_m_gt1_info = { + SNB_M_PLATFORM, + .gt = 1, };

-static const struct intel_device_info intel_sandybridge_m_info = { - GEN6_FEATURES, - .platform = INTEL_SANDYBRIDGE, - .is_mobile = 1, +static const struct intel_device_info intel_sandybridge_m_gt2_info = { + SNB_M_PLATFORM, + .gt = 2, };

#define GEN7_FEATURES \ @@ -249,22 +268,41 @@ static const struct intel_device_info in GEN_DEFAULT_PIPEOFFSETS, \ IVB_CURSOR_OFFSETS

-static const struct intel_device_info intel_ivybridge_d_info = { - GEN7_FEATURES, - .platform = INTEL_IVYBRIDGE, - .has_l3_dpf = 1, +#define IVB_D_PLATFORM \ + GEN7_FEATURES, \ + .platform = INTEL_IVYBRIDGE, \ + .has_l3_dpf = 1 + +static const struct intel_device_info intel_ivybridge_d_gt1_info = { + IVB_D_PLATFORM, + .gt = 1, };

-static const struct intel_device_info intel_ivybridge_m_info = { - GEN7_FEATURES, - .platform = INTEL_IVYBRIDGE, - .is_mobile = 1, - .has_l3_dpf = 1, +static const struct intel_device_info intel_ivybridge_d_gt2_info = { + IVB_D_PLATFORM, + .gt = 2, +}; + +#define IVB_M_PLATFORM \ + GEN7_FEATURES, \ + .platform = INTEL_IVYBRIDGE, \ + .is_mobile = 1, \ + .has_l3_dpf = 1 + +static const struct intel_device_info intel_ivybridge_m_gt1_info = { + IVB_M_PLATFORM, + .gt = 1, +}; + +static const struct intel_device_info intel_ivybridge_m_gt2_info = { + IVB_M_PLATFORM, + .gt = 2, };

static const struct intel_device_info intel_ivybridge_q_info = { GEN7_FEATURES, .platform = INTEL_IVYBRIDGE, + .gt = 2, .num_pipes = 0, /* legal, last one wins */ .has_l3_dpf = 1, }; @@ -299,10 +337,24 @@ static const struct intel_device_info in .has_rc6p = 0 /* RC6p removed-by HSW */, \ .has_runtime_pm = 1

-static const struct intel_device_info intel_haswell_info = { - HSW_FEATURES, - .platform = INTEL_HASWELL, - .has_l3_dpf = 1, +#define HSW_PLATFORM \ + HSW_FEATURES, \ + .platform = INTEL_HASWELL, \ + .has_l3_dpf = 1 + +static const struct intel_device_info intel_haswell_gt1_info = { + HSW_PLATFORM, + .gt = 1, +}; + +static const struct intel_device_info intel_haswell_gt2_info = { + HSW_PLATFORM, + .gt = 2, +}; + +static const struct intel_device_info intel_haswell_gt3_info = { + HSW_PLATFORM, + .gt = 3, };

#define BDW_FEATURES \ @@ -318,12 +370,27 @@ static const struct intel_device_info in .gen = 8, \ .platform = INTEL_BROADWELL

-static const struct intel_device_info intel_broadwell_info = { +static const struct intel_device_info intel_broadwell_gt1_info = { + BDW_PLATFORM, + .gt = 1, +}; + +static const struct intel_device_info intel_broadwell_gt2_info = { BDW_PLATFORM, + .gt = 2, +}; + +static const struct intel_device_info intel_broadwell_rsvd_info = { + BDW_PLATFORM, + .gt = 3, + /* According to the device ID those devices are GT3, they were + * previously treated as not GT3, keep it like that. + */ };

static const struct intel_device_info intel_broadwell_gt3_info = { BDW_PLATFORM, + .gt = 3, .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING, };

@@ -358,13 +425,29 @@ static const struct intel_device_info in .has_guc = 1, \ .ddb_size = 896

-static const struct intel_device_info intel_skylake_info = { +static const struct intel_device_info intel_skylake_gt1_info = { SKL_PLATFORM, + .gt = 1, };

-static const struct intel_device_info intel_skylake_gt3_info = { +static const struct intel_device_info intel_skylake_gt2_info = { SKL_PLATFORM, - .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING, + .gt = 2, +}; + +#define SKL_GT3_PLUS_PLATFORM \ + SKL_PLATFORM, \ + .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING + + +static const struct intel_device_info intel_skylake_gt3_info = { + SKL_GT3_PLUS_PLATFORM, + .gt = 3, +}; + +static const struct intel_device_info intel_skylake_gt4_info = { + SKL_GT3_PLUS_PLATFORM, + .gt = 4, };

#define GEN9_LP_FEATURES \ @@ -416,12 +499,19 @@ static const struct intel_device_info in .has_guc = 1, \ .ddb_size = 896

-static const struct intel_device_info intel_kabylake_info = { +static const struct intel_device_info intel_kabylake_gt1_info = { KBL_PLATFORM, + .gt = 1, +}; + +static const struct intel_device_info intel_kabylake_gt2_info = { + KBL_PLATFORM, + .gt = 2, };

static const struct intel_device_info intel_kabylake_gt3_info = { KBL_PLATFORM, + .gt = 3, .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING, };

@@ -434,20 +524,28 @@ static const struct intel_device_info in .has_guc = 1, \ .ddb_size = 896

-static const struct intel_device_info intel_coffeelake_info = { +static const struct intel_device_info intel_coffeelake_gt1_info = { + CFL_PLATFORM, + .gt = 1, +}; + +static const struct intel_device_info intel_coffeelake_gt2_info = { CFL_PLATFORM, + .gt = 2, };

static const struct intel_device_info intel_coffeelake_gt3_info = { CFL_PLATFORM, + .gt = 3, .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING, };

-static const struct intel_device_info intel_cannonlake_info = { +static const struct intel_device_info intel_cannonlake_gt2_info = { BDW_FEATURES, .is_alpha_support = 1, .platform = INTEL_CANNONLAKE, .gen = 10, + .gt = 2, .ddb_size = 1024, .has_csr = 1, .color = { .degamma_lut_size = 0, .gamma_lut_size = 1024 } @@ -476,31 +574,40 @@ static const struct pci_device_id pciidl INTEL_PINEVIEW_IDS(&intel_pineview_info), INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info), INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info), - INTEL_SNB_D_IDS(&intel_sandybridge_d_info), - INTEL_SNB_M_IDS(&intel_sandybridge_m_info), + INTEL_SNB_D_GT1_IDS(&intel_sandybridge_d_gt1_info), + INTEL_SNB_D_GT2_IDS(&intel_sandybridge_d_gt2_info), + INTEL_SNB_M_GT1_IDS(&intel_sandybridge_m_gt1_info), + INTEL_SNB_M_GT2_IDS(&intel_sandybridge_m_gt2_info), INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */ - INTEL_IVB_M_IDS(&intel_ivybridge_m_info), - INTEL_IVB_D_IDS(&intel_ivybridge_d_info), - INTEL_HSW_IDS(&intel_haswell_info), + INTEL_IVB_M_GT1_IDS(&intel_ivybridge_m_gt1_info), + INTEL_IVB_M_GT2_IDS(&intel_ivybridge_m_gt2_info), + INTEL_IVB_D_GT1_IDS(&intel_ivybridge_d_gt1_info), + INTEL_IVB_D_GT2_IDS(&intel_ivybridge_d_gt2_info), + INTEL_HSW_GT1_IDS(&intel_haswell_gt1_info), + INTEL_HSW_GT2_IDS(&intel_haswell_gt2_info), + INTEL_HSW_GT3_IDS(&intel_haswell_gt3_info), INTEL_VLV_IDS(&intel_valleyview_info), - INTEL_BDW_GT12_IDS(&intel_broadwell_info), + INTEL_BDW_GT1_IDS(&intel_broadwell_gt1_info), + INTEL_BDW_GT2_IDS(&intel_broadwell_gt2_info), INTEL_BDW_GT3_IDS(&intel_broadwell_gt3_info), - INTEL_BDW_RSVD_IDS(&intel_broadwell_info), + INTEL_BDW_RSVD_IDS(&intel_broadwell_rsvd_info), INTEL_CHV_IDS(&intel_cherryview_info), - INTEL_SKL_GT1_IDS(&intel_skylake_info), - INTEL_SKL_GT2_IDS(&intel_skylake_info), + INTEL_SKL_GT1_IDS(&intel_skylake_gt1_info), + INTEL_SKL_GT2_IDS(&intel_skylake_gt2_info), INTEL_SKL_GT3_IDS(&intel_skylake_gt3_info), - INTEL_SKL_GT4_IDS(&intel_skylake_gt3_info), + INTEL_SKL_GT4_IDS(&intel_skylake_gt4_info), INTEL_BXT_IDS(&intel_broxton_info), INTEL_GLK_IDS(&intel_geminilake_info), - INTEL_KBL_GT1_IDS(&intel_kabylake_info), - INTEL_KBL_GT2_IDS(&intel_kabylake_info), + INTEL_KBL_GT1_IDS(&intel_kabylake_gt1_info), + INTEL_KBL_GT2_IDS(&intel_kabylake_gt2_info), INTEL_KBL_GT3_IDS(&intel_kabylake_gt3_info), INTEL_KBL_GT4_IDS(&intel_kabylake_gt3_info), - INTEL_CFL_S_IDS(&intel_coffeelake_info), - INTEL_CFL_H_IDS(&intel_coffeelake_info), - INTEL_CFL_U_IDS(&intel_coffeelake_gt3_info), - INTEL_CNL_IDS(&intel_cannonlake_info), + INTEL_CFL_S_GT1_IDS(&intel_coffeelake_gt1_info), + INTEL_CFL_S_GT2_IDS(&intel_coffeelake_gt2_info), + INTEL_CFL_H_GT2_IDS(&intel_coffeelake_gt2_info), + INTEL_CFL_U_GT3_IDS(&intel_coffeelake_gt3_info), + INTEL_CNL_U_GT2_IDS(&intel_cannonlake_gt2_info), + INTEL_CNL_Y_GT2_IDS(&intel_cannonlake_gt2_info), {0, 0, 0} }; MODULE_DEVICE_TABLE(pci, pciidlist); --- a/include/drm/i915_pciids.h +++ b/include/drm/i915_pciids.h @@ -118,92 +118,125 @@ #define INTEL_IRONLAKE_M_IDS(info) \ INTEL_VGA_DEVICE(0x0046, info)

-#define INTEL_SNB_D_IDS(info) \ +#define INTEL_SNB_D_GT1_IDS(info) \ INTEL_VGA_DEVICE(0x0102, info), \ - INTEL_VGA_DEVICE(0x0112, info), \ - INTEL_VGA_DEVICE(0x0122, info), \ INTEL_VGA_DEVICE(0x010A, info)

-#define INTEL_SNB_M_IDS(info) \ - INTEL_VGA_DEVICE(0x0106, info), \ +#define INTEL_SNB_D_GT2_IDS(info) \ + INTEL_VGA_DEVICE(0x0112, info), \ + INTEL_VGA_DEVICE(0x0122, info) + +#define INTEL_SNB_D_IDS(info) \ + INTEL_SNB_D_GT1_IDS(info), \ + INTEL_SNB_D_GT2_IDS(info) + +#define INTEL_SNB_M_GT1_IDS(info) \ + INTEL_VGA_DEVICE(0x0106, info) + +#define INTEL_SNB_M_GT2_IDS(info) \ INTEL_VGA_DEVICE(0x0116, info), \ INTEL_VGA_DEVICE(0x0126, info)

+#define INTEL_SNB_M_IDS(info) \ + INTEL_SNB_M_GT1_IDS(info), \ + INTEL_SNB_M_GT2_IDS(info) + +#define INTEL_IVB_M_GT1_IDS(info) \ + INTEL_VGA_DEVICE(0x0156, info) /* GT1 mobile */ + +#define INTEL_IVB_M_GT2_IDS(info) \ + INTEL_VGA_DEVICE(0x0166, info) /* GT2 mobile */ + #define INTEL_IVB_M_IDS(info) \ - INTEL_VGA_DEVICE(0x0156, info), /* GT1 mobile */ \ - INTEL_VGA_DEVICE(0x0166, info) /* GT2 mobile */ + INTEL_IVB_M_GT1_IDS(info), \ + INTEL_IVB_M_GT2_IDS(info)

-#define INTEL_IVB_D_IDS(info) \ +#define INTEL_IVB_D_GT1_IDS(info) \ INTEL_VGA_DEVICE(0x0152, info), /* GT1 desktop */ \ + INTEL_VGA_DEVICE(0x015a, info) /* GT1 server */ + +#define INTEL_IVB_D_GT2_IDS(info) \ INTEL_VGA_DEVICE(0x0162, info), /* GT2 desktop */ \ - INTEL_VGA_DEVICE(0x015a, info), /* GT1 server */ \ INTEL_VGA_DEVICE(0x016a, info) /* GT2 server */

+#define INTEL_IVB_D_IDS(info) \ + INTEL_IVB_D_GT1_IDS(info), \ + INTEL_IVB_D_GT2_IDS(info) + #define INTEL_IVB_Q_IDS(info) \ INTEL_QUANTA_VGA_DEVICE(info) /* Quanta transcode */

-#define INTEL_HSW_IDS(info) \ +#define INTEL_HSW_GT1_IDS(info) \ INTEL_VGA_DEVICE(0x0402, info), /* GT1 desktop */ \ - INTEL_VGA_DEVICE(0x0412, info), /* GT2 desktop */ \ - INTEL_VGA_DEVICE(0x0422, info), /* GT3 desktop */ \ INTEL_VGA_DEVICE(0x040a, info), /* GT1 server */ \ - INTEL_VGA_DEVICE(0x041a, info), /* GT2 server */ \ - INTEL_VGA_DEVICE(0x042a, info), /* GT3 server */ \ INTEL_VGA_DEVICE(0x040B, info), /* GT1 reserved */ \ - INTEL_VGA_DEVICE(0x041B, info), /* GT2 reserved */ \ - INTEL_VGA_DEVICE(0x042B, info), /* GT3 reserved */ \ INTEL_VGA_DEVICE(0x040E, info), /* GT1 reserved */ \ - INTEL_VGA_DEVICE(0x041E, info), /* GT2 reserved */ \ - INTEL_VGA_DEVICE(0x042E, info), /* GT3 reserved */ \ INTEL_VGA_DEVICE(0x0C02, info), /* SDV GT1 desktop */ \ - INTEL_VGA_DEVICE(0x0C12, info), /* SDV GT2 desktop */ \ - INTEL_VGA_DEVICE(0x0C22, info), /* SDV GT3 desktop */ \ INTEL_VGA_DEVICE(0x0C0A, info), /* SDV GT1 server */ \ - INTEL_VGA_DEVICE(0x0C1A, info), /* SDV GT2 server */ \ - INTEL_VGA_DEVICE(0x0C2A, info), /* SDV GT3 server */ \ INTEL_VGA_DEVICE(0x0C0B, info), /* SDV GT1 reserved */ \ - INTEL_VGA_DEVICE(0x0C1B, info), /* SDV GT2 reserved */ \ - INTEL_VGA_DEVICE(0x0C2B, info), /* SDV GT3 reserved */ \ INTEL_VGA_DEVICE(0x0C0E, info), /* SDV GT1 reserved */ \ - INTEL_VGA_DEVICE(0x0C1E, info), /* SDV GT2 reserved */ \ - INTEL_VGA_DEVICE(0x0C2E, info), /* SDV GT3 reserved */ \ INTEL_VGA_DEVICE(0x0A02, info), /* ULT GT1 desktop */ \ - INTEL_VGA_DEVICE(0x0A12, info), /* ULT GT2 desktop */ \ - INTEL_VGA_DEVICE(0x0A22, info), /* ULT GT3 desktop */ \ INTEL_VGA_DEVICE(0x0A0A, info), /* ULT GT1 server */ \ - INTEL_VGA_DEVICE(0x0A1A, info), /* ULT GT2 server */ \ - INTEL_VGA_DEVICE(0x0A2A, info), /* ULT GT3 server */ \ INTEL_VGA_DEVICE(0x0A0B, info), /* ULT GT1 reserved */ \ - INTEL_VGA_DEVICE(0x0A1B, info), /* ULT GT2 reserved */ \ - INTEL_VGA_DEVICE(0x0A2B, info), /* ULT GT3 reserved */ \ INTEL_VGA_DEVICE(0x0D02, info), /* CRW GT1 desktop */ \ - INTEL_VGA_DEVICE(0x0D12, info), /* CRW GT2 desktop */ \ - INTEL_VGA_DEVICE(0x0D22, info), /* CRW GT3 desktop */ \ INTEL_VGA_DEVICE(0x0D0A, info), /* CRW GT1 server */ \ - INTEL_VGA_DEVICE(0x0D1A, info), /* CRW GT2 server */ \ - INTEL_VGA_DEVICE(0x0D2A, info), /* CRW GT3 server */ \ INTEL_VGA_DEVICE(0x0D0B, info), /* CRW GT1 reserved */ \ - INTEL_VGA_DEVICE(0x0D1B, info), /* CRW GT2 reserved */ \ - INTEL_VGA_DEVICE(0x0D2B, info), /* CRW GT3 reserved */ \ INTEL_VGA_DEVICE(0x0D0E, info), /* CRW GT1 reserved */ \ - INTEL_VGA_DEVICE(0x0D1E, info), /* CRW GT2 reserved */ \ - INTEL_VGA_DEVICE(0x0D2E, info), /* CRW GT3 reserved */ \ INTEL_VGA_DEVICE(0x0406, info), /* GT1 mobile */ \ + INTEL_VGA_DEVICE(0x0C06, info), /* SDV GT1 mobile */ \ + INTEL_VGA_DEVICE(0x0A06, info), /* ULT GT1 mobile */ \ + INTEL_VGA_DEVICE(0x0A0E, info), /* ULX GT1 mobile */ \ + INTEL_VGA_DEVICE(0x0D06, info) /* CRW GT1 mobile */ + +#define INTEL_HSW_GT2_IDS(info) \ + INTEL_VGA_DEVICE(0x0412, info), /* GT2 desktop */ \ + INTEL_VGA_DEVICE(0x041a, info), /* GT2 server */ \ + INTEL_VGA_DEVICE(0x041B, info), /* GT2 reserved */ \ + INTEL_VGA_DEVICE(0x041E, info), /* GT2 reserved */ \ + INTEL_VGA_DEVICE(0x0C12, info), /* SDV GT2 desktop */ \ + INTEL_VGA_DEVICE(0x0C1A, info), /* SDV GT2 server */ \ + INTEL_VGA_DEVICE(0x0C1B, info), /* SDV GT2 reserved */ \ + INTEL_VGA_DEVICE(0x0C1E, info), /* SDV GT2 reserved */ \ + INTEL_VGA_DEVICE(0x0A12, info), /* ULT GT2 desktop */ \ + INTEL_VGA_DEVICE(0x0A1A, info), /* ULT GT2 server */ \ + INTEL_VGA_DEVICE(0x0A1B, info), /* ULT GT2 reserved */ \ + INTEL_VGA_DEVICE(0x0D12, info), /* CRW GT2 desktop */ \ + INTEL_VGA_DEVICE(0x0D1A, info), /* CRW GT2 server */ \ + INTEL_VGA_DEVICE(0x0D1B, info), /* CRW GT2 reserved */ \ + INTEL_VGA_DEVICE(0x0D1E, info), /* CRW GT2 reserved */ \ INTEL_VGA_DEVICE(0x0416, info), /* GT2 mobile */ \ INTEL_VGA_DEVICE(0x0426, info), /* GT2 mobile */ \ - INTEL_VGA_DEVICE(0x0C06, info), /* SDV GT1 mobile */ \ INTEL_VGA_DEVICE(0x0C16, info), /* SDV GT2 mobile */ \ - INTEL_VGA_DEVICE(0x0C26, info), /* SDV GT3 mobile */ \ - INTEL_VGA_DEVICE(0x0A06, info), /* ULT GT1 mobile */ \ INTEL_VGA_DEVICE(0x0A16, info), /* ULT GT2 mobile */ \ - INTEL_VGA_DEVICE(0x0A26, info), /* ULT GT3 mobile */ \ - INTEL_VGA_DEVICE(0x0A0E, info), /* ULX GT1 mobile */ \ INTEL_VGA_DEVICE(0x0A1E, info), /* ULX GT2 mobile */ \ + INTEL_VGA_DEVICE(0x0D16, info) /* CRW GT2 mobile */ + +#define INTEL_HSW_GT3_IDS(info) \ + INTEL_VGA_DEVICE(0x0422, info), /* GT3 desktop */ \ + INTEL_VGA_DEVICE(0x042a, info), /* GT3 server */ \ + INTEL_VGA_DEVICE(0x042B, info), /* GT3 reserved */ \ + INTEL_VGA_DEVICE(0x042E, info), /* GT3 reserved */ \ + INTEL_VGA_DEVICE(0x0C22, info), /* SDV GT3 desktop */ \ + INTEL_VGA_DEVICE(0x0C2A, info), /* SDV GT3 server */ \ + INTEL_VGA_DEVICE(0x0C2B, info), /* SDV GT3 reserved */ \ + INTEL_VGA_DEVICE(0x0C2E, info), /* SDV GT3 reserved */ \ + INTEL_VGA_DEVICE(0x0A22, info), /* ULT GT3 desktop */ \ + INTEL_VGA_DEVICE(0x0A2A, info), /* ULT GT3 server */ \ + INTEL_VGA_DEVICE(0x0A2B, info), /* ULT GT3 reserved */ \ + INTEL_VGA_DEVICE(0x0D22, info), /* CRW GT3 desktop */ \ + INTEL_VGA_DEVICE(0x0D2A, info), /* CRW GT3 server */ \ + INTEL_VGA_DEVICE(0x0D2B, info), /* CRW GT3 reserved */ \ + INTEL_VGA_DEVICE(0x0D2E, info), /* CRW GT3 reserved */ \ + INTEL_VGA_DEVICE(0x0C26, info), /* SDV GT3 mobile */ \ + INTEL_VGA_DEVICE(0x0A26, info), /* ULT GT3 mobile */ \ INTEL_VGA_DEVICE(0x0A2E, info), /* ULT GT3 reserved */ \ - INTEL_VGA_DEVICE(0x0D06, info), /* CRW GT1 mobile */ \ - INTEL_VGA_DEVICE(0x0D16, info), /* CRW GT2 mobile */ \ INTEL_VGA_DEVICE(0x0D26, info) /* CRW GT3 mobile */

+#define INTEL_HSW_IDS(info) \ + INTEL_HSW_GT1_IDS(info), \ + INTEL_HSW_GT2_IDS(info), \ + INTEL_HSW_GT3_IDS(info) + #define INTEL_VLV_IDS(info) \ INTEL_VGA_DEVICE(0x0f30, info), \ INTEL_VGA_DEVICE(0x0f31, info), \ @@ -212,17 +245,19 @@ INTEL_VGA_DEVICE(0x0157, info), \ INTEL_VGA_DEVICE(0x0155, info)

-#define INTEL_BDW_GT12_IDS(info) \ +#define INTEL_BDW_GT1_IDS(info) \ INTEL_VGA_DEVICE(0x1602, info), /* GT1 ULT */ \ INTEL_VGA_DEVICE(0x1606, info), /* GT1 ULT */ \ INTEL_VGA_DEVICE(0x160B, info), /* GT1 Iris */ \ INTEL_VGA_DEVICE(0x160E, info), /* GT1 ULX */ \ - INTEL_VGA_DEVICE(0x1612, info), /* GT2 Halo */ \ + INTEL_VGA_DEVICE(0x160A, info), /* GT1 Server */ \ + INTEL_VGA_DEVICE(0x160D, info) /* GT1 Workstation */ + +#define INTEL_BDW_GT2_IDS(info) \ + INTEL_VGA_DEVICE(0x1612, info), /* GT2 Halo */ \ INTEL_VGA_DEVICE(0x1616, info), /* GT2 ULT */ \ INTEL_VGA_DEVICE(0x161B, info), /* GT2 ULT */ \ - INTEL_VGA_DEVICE(0x161E, info), /* GT2 ULX */ \ - INTEL_VGA_DEVICE(0x160A, info), /* GT1 Server */ \ - INTEL_VGA_DEVICE(0x160D, info), /* GT1 Workstation */ \ + INTEL_VGA_DEVICE(0x161E, info), /* GT2 ULX */ \ INTEL_VGA_DEVICE(0x161A, info), /* GT2 Server */ \ INTEL_VGA_DEVICE(0x161D, info) /* GT2 Workstation */

@@ -243,7 +278,8 @@ INTEL_VGA_DEVICE(0x163D, info) /* Workstation */

#define INTEL_BDW_IDS(info) \ - INTEL_BDW_GT12_IDS(info), \ + INTEL_BDW_GT1_IDS(info), \ + INTEL_BDW_GT2_IDS(info), \ INTEL_BDW_GT3_IDS(info), \ INTEL_BDW_RSVD_IDS(info)

@@ -335,20 +371,22 @@ INTEL_KBL_GT4_IDS(info)

/* CFL S */ -#define INTEL_CFL_S_IDS(info) \ +#define INTEL_CFL_S_GT1_IDS(info) \ INTEL_VGA_DEVICE(0x3E90, info), /* SRV GT1 */ \ - INTEL_VGA_DEVICE(0x3E93, info), /* SRV GT1 */ \ + INTEL_VGA_DEVICE(0x3E93, info) /* SRV GT1 */ + +#define INTEL_CFL_S_GT2_IDS(info) \ INTEL_VGA_DEVICE(0x3E91, info), /* SRV GT2 */ \ INTEL_VGA_DEVICE(0x3E92, info), /* SRV GT2 */ \ INTEL_VGA_DEVICE(0x3E96, info) /* SRV GT2 */

/* CFL H */ -#define INTEL_CFL_H_IDS(info) \ +#define INTEL_CFL_H_GT2_IDS(info) \ INTEL_VGA_DEVICE(0x3E9B, info), /* Halo GT2 */ \ INTEL_VGA_DEVICE(0x3E94, info) /* Halo GT2 */

/* CFL U */ -#define INTEL_CFL_U_IDS(info) \ +#define INTEL_CFL_U_GT3_IDS(info) \ INTEL_VGA_DEVICE(0x3EA6, info), /* ULT GT3 */ \ INTEL_VGA_DEVICE(0x3EA7, info), /* ULT GT3 */ \ INTEL_VGA_DEVICE(0x3EA8, info), /* ULT GT3 */ \

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Lucas De Marchi lucas.demarchi@intel.com

commit 33aa69ed8aacd92dea12671e52eb3ca6ac2d7a49 upstream.

CFL was missing from intel_early_ids[]. The PCI ID needs to be there to allow the memory region to be stolen, otherwise we could have RAM being arbitrarily overwritten if for example we keep using the UEFI framebuffer, depending on how BIOS has set up the e820 map.

Fixes: b056f8f3d6b9 ("drm/i915/cfl: Add Coffee Lake PCI IDs for S Skus.") Signed-off-by: Lucas De Marchi lucas.demarchi@intel.com Cc: Rodrigo Vivi rodrigo.vivi@intel.com Cc: Anusha Srivatsa anusha.srivatsa@intel.com Cc: Jani Nikula jani.nikula@linux.intel.com Cc: Joonas Lahtinen joonas.lahtinen@linux.intel.com Cc: David Airlie airlied@linux.ie Cc: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org Cc: Ingo Molnar mingo@kernel.org Cc: H. Peter Anvin hpa@zytor.com Cc: Thomas Gleixner tglx@linutronix.de Cc: x86@kernel.org Cc: stable@vger.kernel.org # v4.13+ 0890540e21cf drm/i915: add GT number to intel_device_info Cc: stable@vger.kernel.org # v4.13+ 41693fd52373 drm/i915/kbl: Change a KBL pci id to GT2 from GT1.5 Cc: stable@vger.kernel.org # v4.13+ Reviewed-by: Rodrigo Vivi rodrigo.vivi@intel.com Acked-by: Jani Nikula jani.nikula@intel.com Acked-by: Ingo Molnar mingo@kernel.org Signed-off-by: Rodrigo Vivi rodrigo.vivi@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20171213200425.2954-1-lucas.de... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/kernel/early-quirks.c | 1 + include/drm/i915_pciids.h | 6 ++++++ 2 files changed, 7 insertions(+)

--- a/arch/x86/kernel/early-quirks.c +++ b/arch/x86/kernel/early-quirks.c @@ -527,6 +527,7 @@ static const struct pci_device_id intel_ INTEL_SKL_IDS(&gen9_early_ops), INTEL_BXT_IDS(&gen9_early_ops), INTEL_KBL_IDS(&gen9_early_ops), + INTEL_CFL_IDS(&gen9_early_ops), INTEL_GLK_IDS(&gen9_early_ops), INTEL_CNL_IDS(&gen9_early_ops), }; --- a/include/drm/i915_pciids.h +++ b/include/drm/i915_pciids.h @@ -392,6 +392,12 @@ INTEL_VGA_DEVICE(0x3EA8, info), /* ULT GT3 */ \ INTEL_VGA_DEVICE(0x3EA5, info) /* ULT GT3 */

+#define INTEL_CFL_IDS(info) \ + INTEL_CFL_S_GT1_IDS(info), \ + INTEL_CFL_S_GT2_IDS(info), \ + INTEL_CFL_H_GT2_IDS(info), \ + INTEL_CFL_U_GT3_IDS(info) + /* CNL U 2+2 */ #define INTEL_CNL_U_GT2_IDS(info) \ INTEL_VGA_DEVICE(0x5A52, info), \

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Juergen Gross jgross@suse.com

commit 4f277295e54c5b7340e48efea3fc5cc21a2872b7 upstream.

When running as Xen pv guest %gs is initialized some time after C code is started. Depending on stack protector usage this might be too late, resulting in page faults.

So setup %gs and MSR_GS_BASE in assembly code already.

Cc: stable@vger.kernel.org Signed-off-by: Juergen Gross jgross@suse.com Reviewed-by: Boris Ostrovsky boris.ostrovsky@oracle.com Tested-by: Chris Patterson cjp256@gmail.com Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/xen/xen-head.S | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)

--- a/arch/x86/xen/xen-head.S +++ b/arch/x86/xen/xen-head.S @@ -9,7 +9,9 @@

#include <asm/boot.h> #include <asm/asm.h> +#include <asm/msr.h> #include <asm/page_types.h> +#include <asm/percpu.h> #include <asm/unwind_hints.h>

#include <xen/interface/elfnote.h> @@ -35,6 +37,20 @@ ENTRY(startup_xen) mov %_ASM_SI, xen_start_info mov $init_thread_union+THREAD_SIZE, %_ASM_SP

+#ifdef CONFIG_X86_64 + /* Set up %gs. + * + * The base of %gs always points to the bottom of the irqstack + * union. If the stack protector canary is enabled, it is + * located at %gs:40. Note that, on SMP, the boot cpu uses + * init data section till per cpu areas are set up. + */ + movl $MSR_GS_BASE,%ecx + movq $INIT_PER_CPU_VAR(irq_stack_union),%rax + cdq + wrmsr +#endif + jmp xen_start_kernel END(startup_xen) __FINIT

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dan Williams dan.j.williams@intel.com

commit 6b8cf5cc9965673951f1ab3f0e3cf23d06e3e2ee upstream.

At entry userspace may have populated registers with values that could otherwise be useful in a speculative execution attack. Clear them to minimize the kernel's attack surface.

Originally-From: Andi Kleen ak@linux.intel.com Signed-off-by: Dan Williams dan.j.williams@intel.com Cc: stable@vger.kernel.org Cc: Andy Lutomirski luto@kernel.org Cc: Borislav Petkov bp@alien8.de Cc: Brian Gerst brgerst@gmail.com Cc: Denys Vlasenko dvlasenk@redhat.com Cc: H. Peter Anvin hpa@zytor.com Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Link: http://lkml.kernel.org/r/151787989697.7847.4083702787288600552.stgit@dwillia... [ Made small improvements to the changelog. ] Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/entry/entry_64_compat.S | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)

--- a/arch/x86/entry/entry_64_compat.S +++ b/arch/x86/entry/entry_64_compat.S @@ -85,15 +85,25 @@ ENTRY(entry_SYSENTER_compat) pushq %rcx /* pt_regs->cx */ pushq $-ENOSYS /* pt_regs->ax */ pushq $0 /* pt_regs->r8 = 0 */ + xorq %r8, %r8 /* nospec r8 */ pushq $0 /* pt_regs->r9 = 0 */ + xorq %r9, %r9 /* nospec r9 */ pushq $0 /* pt_regs->r10 = 0 */ + xorq %r10, %r10 /* nospec r10 */ pushq $0 /* pt_regs->r11 = 0 */ + xorq %r11, %r11 /* nospec r11 */ pushq %rbx /* pt_regs->rbx */ + xorl %ebx, %ebx /* nospec rbx */ pushq %rbp /* pt_regs->rbp (will be overwritten) */ + xorl %ebp, %ebp /* nospec rbp */ pushq $0 /* pt_regs->r12 = 0 */ + xorq %r12, %r12 /* nospec r12 */ pushq $0 /* pt_regs->r13 = 0 */ + xorq %r13, %r13 /* nospec r13 */ pushq $0 /* pt_regs->r14 = 0 */ + xorq %r14, %r14 /* nospec r14 */ pushq $0 /* pt_regs->r15 = 0 */ + xorq %r15, %r15 /* nospec r15 */ cld

/* @@ -214,15 +224,25 @@ GLOBAL(entry_SYSCALL_compat_after_hwfram pushq %rbp /* pt_regs->cx (stashed in bp) */ pushq $-ENOSYS /* pt_regs->ax */ pushq $0 /* pt_regs->r8 = 0 */ + xorq %r8, %r8 /* nospec r8 */ pushq $0 /* pt_regs->r9 = 0 */ + xorq %r9, %r9 /* nospec r9 */ pushq $0 /* pt_regs->r10 = 0 */ + xorq %r10, %r10 /* nospec r10 */ pushq $0 /* pt_regs->r11 = 0 */ + xorq %r11, %r11 /* nospec r11 */ pushq %rbx /* pt_regs->rbx */ + xorl %ebx, %ebx /* nospec rbx */ pushq %rbp /* pt_regs->rbp (will be overwritten) */ + xorl %ebp, %ebp /* nospec rbp */ pushq $0 /* pt_regs->r12 = 0 */ + xorq %r12, %r12 /* nospec r12 */ pushq $0 /* pt_regs->r13 = 0 */ + xorq %r13, %r13 /* nospec r13 */ pushq $0 /* pt_regs->r14 = 0 */ + xorq %r14, %r14 /* nospec r14 */ pushq $0 /* pt_regs->r15 = 0 */ + xorq %r15, %r15 /* nospec r15 */

/* * User mode is traced as though IRQs are on, and SYSENTER @@ -338,15 +358,25 @@ ENTRY(entry_INT80_compat) pushq %rcx /* pt_regs->cx */ pushq $-ENOSYS /* pt_regs->ax */ pushq $0 /* pt_regs->r8 = 0 */ + xorq %r8, %r8 /* nospec r8 */ pushq $0 /* pt_regs->r9 = 0 */ + xorq %r9, %r9 /* nospec r9 */ pushq $0 /* pt_regs->r10 = 0 */ + xorq %r10, %r10 /* nospec r10 */ pushq $0 /* pt_regs->r11 = 0 */ + xorq %r11, %r11 /* nospec r11 */ pushq %rbx /* pt_regs->rbx */ + xorl %ebx, %ebx /* nospec rbx */ pushq %rbp /* pt_regs->rbp */ + xorl %ebp, %ebp /* nospec rbp */ pushq %r12 /* pt_regs->r12 */ + xorq %r12, %r12 /* nospec r12 */ pushq %r13 /* pt_regs->r13 */ + xorq %r13, %r13 /* nospec r13 */ pushq %r14 /* pt_regs->r14 */ + xorq %r14, %r14 /* nospec r14 */ pushq %r15 /* pt_regs->r15 */ + xorq %r15, %r15 /* nospec r15 */ cld

/*

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Artem Savkov artem.savkov@gmail.com

commit dd78c832ffaf86eb6434e56de4bc3bc31f03f771 upstream.

According to crypto/rng.h generate function should return 0 on success and < 0 on error.

Fixes: b8ae5c7387ad ("crypto: sun4i-ss - support the Security System PRNG") Signed-off-by: Artem Savkov artem.savkov@gmail.com Acked-by: Corentin Labbe clabbe.montjoie@gmail.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/crypto/sunxi-ss/sun4i-ss-prng.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/crypto/sunxi-ss/sun4i-ss-prng.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-prng.c @@ -52,5 +52,5 @@ int sun4i_ss_prng_generate(struct crypto

writel(0, ss->base + SS_CTL); spin_unlock(&ss->slock); - return dlen; + return 0; }

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Balbir Singh bsingharora@gmail.com

commit 4dd5f8a99e791a8c6500e3592f3ce81ae7edcde1 upstream.

This patch splits the linear mapping if the hot-unplug range is smaller than the mapping size. The code detects if the mapping needs to be split into a smaller size and if so, uses the stop machine infrastructure to clear the existing mapping and then remap the remaining range using a smaller page size.

The code will skip any region of the mapping that overlaps with kernel text and warn about it once. We don't want to remove a mapping where the kernel text and the LMB we intend to remove overlap in the same TLB mapping as it may affect the currently executing code.

I've tested these changes under a kvm guest with 2 vcpus, from a split mapping point of view, some of the caveats mentioned above applied to the testing I did.

Fixes: 4b5d62ca17a1 ("powerpc/mm: add radix__remove_section_mapping()") Signed-off-by: Balbir Singh bsingharora@gmail.com [mpe: Tweak change log to match updated behaviour] Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/powerpc/mm/pgtable-radix.c | 95 +++++++++++++++++++++++++++++++--------- 1 file changed, 74 insertions(+), 21 deletions(-)

--- a/arch/powerpc/mm/pgtable-radix.c +++ b/arch/powerpc/mm/pgtable-radix.c @@ -17,6 +17,7 @@ #include <linux/of_fdt.h> #include <linux/mm.h> #include <linux/string_helpers.h> +#include <linux/stop_machine.h>

#include <asm/pgtable.h> #include <asm/pgalloc.h> @@ -671,6 +672,30 @@ static void free_pmd_table(pmd_t *pmd_st pud_clear(pud); }

+struct change_mapping_params { + pte_t *pte; + unsigned long start; + unsigned long end; + unsigned long aligned_start; + unsigned long aligned_end; +}; + +static int stop_machine_change_mapping(void *data) +{ + struct change_mapping_params *params = + (struct change_mapping_params *)data; + + if (!data) + return -1; + + spin_unlock(&init_mm.page_table_lock); + pte_clear(&init_mm, params->aligned_start, params->pte); + create_physical_mapping(params->aligned_start, params->start); + create_physical_mapping(params->end, params->aligned_end); + spin_lock(&init_mm.page_table_lock); + return 0; +} + static void remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end) { @@ -699,6 +724,52 @@ static void remove_pte_table(pte_t *pte_ } }

+/* + * clear the pte and potentially split the mapping helper + */ +static void split_kernel_mapping(unsigned long addr, unsigned long end, + unsigned long size, pte_t *pte) +{ + unsigned long mask = ~(size - 1); + unsigned long aligned_start = addr & mask; + unsigned long aligned_end = addr + size; + struct change_mapping_params params; + bool split_region = false; + + if ((end - addr) < size) { + /* + * We're going to clear the PTE, but not flushed + * the mapping, time to remap and flush. The + * effects if visible outside the processor or + * if we are running in code close to the + * mapping we cleared, we are in trouble. + */ + if (overlaps_kernel_text(aligned_start, addr) || + overlaps_kernel_text(end, aligned_end)) { + /* + * Hack, just return, don't pte_clear + */ + WARN_ONCE(1, "Linear mapping %lx->%lx overlaps kernel " + "text, not splitting\n", addr, end); + return; + } + split_region = true; + } + + if (split_region) { + params.pte = pte; + params.start = addr; + params.end = end; + params.aligned_start = addr & ~(size - 1); + params.aligned_end = min_t(unsigned long, aligned_end, + (unsigned long)__va(memblock_end_of_DRAM())); + stop_machine(stop_machine_change_mapping, &params, NULL); + return; + } + + pte_clear(&init_mm, addr, pte); +} + static void remove_pmd_table(pmd_t *pmd_start, unsigned long addr, unsigned long end) { @@ -714,13 +785,7 @@ static void remove_pmd_table(pmd_t *pmd_ continue;

if (pmd_huge(*pmd)) { - if (!IS_ALIGNED(addr, PMD_SIZE) || - !IS_ALIGNED(next, PMD_SIZE)) { - WARN_ONCE(1, "%s: unaligned range\n", __func__); - continue; - } - - pte_clear(&init_mm, addr, (pte_t *)pmd); + split_kernel_mapping(addr, end, PMD_SIZE, (pte_t *)pmd); continue; }

@@ -745,13 +810,7 @@ static void remove_pud_table(pud_t *pud_ continue;

if (pud_huge(*pud)) { - if (!IS_ALIGNED(addr, PUD_SIZE) || - !IS_ALIGNED(next, PUD_SIZE)) { - WARN_ONCE(1, "%s: unaligned range\n", __func__); - continue; - } - - pte_clear(&init_mm, addr, (pte_t *)pud); + split_kernel_mapping(addr, end, PUD_SIZE, (pte_t *)pud); continue; }

@@ -777,13 +836,7 @@ static void remove_pagetable(unsigned lo continue;

if (pgd_huge(*pgd)) { - if (!IS_ALIGNED(addr, PGDIR_SIZE) || - !IS_ALIGNED(next, PGDIR_SIZE)) { - WARN_ONCE(1, "%s: unaligned range\n", __func__); - continue; - } - - pte_clear(&init_mm, addr, (pte_t *)pgd); + split_kernel_mapping(addr, end, PGDIR_SIZE, (pte_t *)pgd); continue; }

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: David Woodhouse dwmw@amazon.co.uk

commit 1751342095f0d2b36fa8114d8e12c5688c455ac4 upstream.

Intel have retroactively blessed the 0xc2 microcode on Skylake mobile and desktop parts, and the Gemini Lake 0x22 microcode is apparently fine too. We blacklisted the latter purely because it was present with all the other problematic ones in the 2018-01-08 release, but now it's explicitly listed as OK.

We still list 0x84 for the various Kaby Lake / Coffee Lake parts, as that appeared in one version of the blacklist and then reverted to 0x80 again. We can change it if 0x84 is actually announced to be safe.

Signed-off-by: David Woodhouse dwmw@amazon.co.uk Cc: Andy Lutomirski luto@kernel.org Cc: Arjan van de Ven arjan@linux.intel.com Cc: Borislav Petkov bp@alien8.de Cc: Dan Williams dan.j.williams@intel.com Cc: Dave Hansen dave.hansen@linux.intel.com Cc: David Woodhouse dwmw2@infradead.org Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: arjan.van.de.ven@intel.com Cc: jmattson@google.com Cc: karahmed@amazon.de Cc: kvm@vger.kernel.org Cc: pbonzini@redhat.com Cc: rkrcmar@redhat.com Cc: sironi@amazon.de Link: http://lkml.kernel.org/r/1518305967-31356-2-git-send-email-dwmw@amazon.co.uk Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/kernel/cpu/intel.c | 4 ---- 1 file changed, 4 deletions(-)

--- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -123,8 +123,6 @@ static const struct sku_microcode spectr { INTEL_FAM6_KABYLAKE_MOBILE, 0x09, 0x84 }, { INTEL_FAM6_SKYLAKE_X, 0x03, 0x0100013e }, { INTEL_FAM6_SKYLAKE_X, 0x04, 0x0200003c }, - { INTEL_FAM6_SKYLAKE_MOBILE, 0x03, 0xc2 }, - { INTEL_FAM6_SKYLAKE_DESKTOP, 0x03, 0xc2 }, { INTEL_FAM6_BROADWELL_CORE, 0x04, 0x28 }, { INTEL_FAM6_BROADWELL_GT3E, 0x01, 0x1b }, { INTEL_FAM6_BROADWELL_XEON_D, 0x02, 0x14 }, @@ -136,8 +134,6 @@ static const struct sku_microcode spectr { INTEL_FAM6_HASWELL_X, 0x02, 0x3b }, { INTEL_FAM6_HASWELL_X, 0x04, 0x10 }, { INTEL_FAM6_IVYBRIDGE_X, 0x04, 0x42a }, - /* Updated in the 20180108 release; blacklist until we know otherwise */ - { INTEL_FAM6_ATOM_GEMINI_LAKE, 0x01, 0x22 }, /* Observed in the wild */ { INTEL_FAM6_SANDYBRIDGE_X, 0x06, 0x61b }, { INTEL_FAM6_SANDYBRIDGE_X, 0x07, 0x712 },

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: David Woodhouse dwmw@amazon.co.uk

commit f208820a321f9b23d77d7eed89945d862d62a3ed upstream.

This reverts commit 64e16720ea0879f8ab4547e3b9758936d483909b.

We cannot call C functions like that, without marking all the call-clobbered registers as, well, clobbered. We might have got away with it for now because the __ibp_barrier() function was *fairly* unlikely to actually use any other registers. But no. Just no.

Signed-off-by: David Woodhouse dwmw@amazon.co.uk Cc: Andy Lutomirski luto@kernel.org Cc: Arjan van de Ven arjan@linux.intel.com Cc: Borislav Petkov bp@alien8.de Cc: Dan Williams dan.j.williams@intel.com Cc: Dave Hansen dave.hansen@linux.intel.com Cc: David Woodhouse dwmw2@infradead.org Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: arjan.van.de.ven@intel.com Cc: dave.hansen@intel.com Cc: jmattson@google.com Cc: karahmed@amazon.de Cc: kvm@vger.kernel.org Cc: pbonzini@redhat.com Cc: rkrcmar@redhat.com Cc: sironi@amazon.de Link: http://lkml.kernel.org/r/1518305967-31356-3-git-send-email-dwmw@amazon.co.uk Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/include/asm/nospec-branch.h | 13 +++++++++---- arch/x86/include/asm/processor.h | 3 --- arch/x86/kernel/cpu/bugs.c | 6 ------ 3 files changed, 9 insertions(+), 13 deletions(-)

--- a/arch/x86/include/asm/nospec-branch.h +++ b/arch/x86/include/asm/nospec-branch.h @@ -164,10 +164,15 @@ static inline void vmexit_fill_RSB(void)

static inline void indirect_branch_prediction_barrier(void) { - alternative_input("", - "call __ibp_barrier", - X86_FEATURE_USE_IBPB, - ASM_NO_INPUT_CLOBBER("eax", "ecx", "edx", "memory")); + asm volatile(ALTERNATIVE("", + "movl %[msr], %%ecx\n\t" + "movl %[val], %%eax\n\t" + "movl $0, %%edx\n\t" + "wrmsr", + X86_FEATURE_USE_IBPB) + : : [msr] "i" (MSR_IA32_PRED_CMD), + [val] "i" (PRED_CMD_IBPB) + : "eax", "ecx", "edx", "memory"); }

#endif /* __ASSEMBLY__ */ --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -968,7 +968,4 @@ bool xen_set_default_idle(void);

void stop_this_cpu(void *dummy); void df_debug(struct pt_regs *regs, long error_code); - -void __ibp_barrier(void); - #endif /* _ASM_X86_PROCESSOR_H */ --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -337,9 +337,3 @@ ssize_t cpu_show_spectre_v2(struct devic spectre_v2_module_string()); } #endif - -void __ibp_barrier(void) -{ - __wrmsr(MSR_IA32_PRED_CMD, PRED_CMD_IBPB, 0); -} -EXPORT_SYMBOL_GPL(__ibp_barrier);

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Lukas Wunner lukas@wunner.de

commit 433986c2c265d106d6a8e88006e0131fefc92b7b upstream.

Commit baa8809f6097 (PM / runtime: Optimize the use of device links) added an invocation of pm_runtime_drop_link() to __device_link_del(). However there are two variants of that function, one for CONFIG_SRCU and another for !CONFIG_SRCU, and the commit only modified the former.

Fixes: baa8809f6097 (PM / runtime: Optimize the use of device links) Cc: v4.10+ stable@vger.kernel.org # v4.10+ Signed-off-by: Lukas Wunner lukas@wunner.de Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/base/core.c | 3 +++ 1 file changed, 3 insertions(+)

--- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -313,6 +313,9 @@ static void __device_link_del(struct dev dev_info(link->consumer, "Dropping the link to %s\n", dev_name(link->supplier));

+ if (link->flags & DL_FLAG_PM_RUNTIME) + pm_runtime_drop_link(link->consumer); + list_del(&link->s_node); list_del(&link->c_node); device_link_free(link);

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dan Williams dan.j.williams@intel.com

commit 3ac6d8c787b835b997eb23e43e09aa0895ef7d58 upstream.

Clear the 'extra' registers on entering the 64-bit kernel for exceptions and interrupts. The common registers are not cleared since they are likely clobbered well before they can be exploited in a speculative execution attack.

Originally-From: Andi Kleen ak@linux.intel.com Signed-off-by: Dan Williams dan.j.williams@intel.com Cc: stable@vger.kernel.org Cc: Andy Lutomirski luto@kernel.org Cc: Borislav Petkov bp@alien8.de Cc: Brian Gerst brgerst@gmail.com Cc: Denys Vlasenko dvlasenk@redhat.com Cc: H. Peter Anvin hpa@zytor.com Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Link: http://lkml.kernel.org/r/151787989146.7847.15749181712358213254.stgit@dwilli... [ Made small improvements to the changelog and the code comments. ] Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/entry/calling.h | 19 +++++++++++++++++++ arch/x86/entry/entry_64.S | 6 +++++- 2 files changed, 24 insertions(+), 1 deletion(-)

--- a/arch/x86/entry/calling.h +++ b/arch/x86/entry/calling.h @@ -147,6 +147,25 @@ For 32-bit we have the following convent UNWIND_HINT_REGS offset=\offset .endm

+ /* + * Sanitize registers of values that a speculation attack + * might otherwise want to exploit. The lower registers are + * likely clobbered well before they could be put to use in + * a speculative execution gadget: + */ + .macro CLEAR_REGS_NOSPEC + xorl %ebp, %ebp + xorl %ebx, %ebx + xorq %r8, %r8 + xorq %r9, %r9 + xorq %r10, %r10 + xorq %r11, %r11 + xorq %r12, %r12 + xorq %r13, %r13 + xorq %r14, %r14 + xorq %r15, %r15 + .endm + .macro POP_EXTRA_REGS popq %r15 popq %r14 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -571,6 +571,7 @@ END(irq_entries_start) ALLOC_PT_GPREGS_ON_STACK SAVE_C_REGS SAVE_EXTRA_REGS + CLEAR_REGS_NOSPEC ENCODE_FRAME_POINTER

testb $3, CS(%rsp) @@ -1127,6 +1128,7 @@ ENTRY(xen_failsafe_callback) ALLOC_PT_GPREGS_ON_STACK SAVE_C_REGS SAVE_EXTRA_REGS + CLEAR_REGS_NOSPEC ENCODE_FRAME_POINTER jmp error_exit END(xen_failsafe_callback) @@ -1172,6 +1174,7 @@ ENTRY(paranoid_entry) cld SAVE_C_REGS 8 SAVE_EXTRA_REGS 8 + CLEAR_REGS_NOSPEC ENCODE_FRAME_POINTER 8 movl $1, %ebx movl $MSR_GS_BASE, %ecx @@ -1224,8 +1227,8 @@ ENTRY(error_entry) cld SAVE_C_REGS 8 SAVE_EXTRA_REGS 8 + CLEAR_REGS_NOSPEC ENCODE_FRAME_POINTER 8 - xorl %ebx, %ebx testb $3, CS+8(%rsp) jz .Lerror_kernelspace

@@ -1422,6 +1425,7 @@ ENTRY(nmi) pushq %r14 /* pt_regs->r14 */ pushq %r15 /* pt_regs->r15 */ UNWIND_HINT_REGS + CLEAR_REGS_NOSPEC ENCODE_FRAME_POINTER

/*

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dominik Brodowski linux@dominikbrodowski.net

commit 502af0d70843c2a9405d7ba1f79b4b0305aaf5f5 upstream.

The two special, opencoded cases for POP_C_REGS can be handled by ASM macros.

Signed-off-by: Dominik Brodowski linux@dominikbrodowski.net Cc: Andy Lutomirski luto@kernel.org Cc: Borislav Petkov bp@alien8.de Cc: Brian Gerst brgerst@gmail.com Cc: Denys Vlasenko dvlasenk@redhat.com Cc: H. Peter Anvin hpa@zytor.com Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: dan.j.williams@intel.com Link: http://lkml.kernel.org/r/20180211104949.12992-3-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/entry/calling.h | 15 +++++++++++---- arch/x86/entry/entry_64.S | 26 ++++---------------------- 2 files changed, 15 insertions(+), 26 deletions(-)

--- a/arch/x86/entry/calling.h +++ b/arch/x86/entry/calling.h @@ -139,25 +139,32 @@ For 32-bit we have the following convent xorq %r15, %r15 .endm

- .macro POP_EXTRA_REGS + .macro POP_REGS pop_rdi=1 skip_r11rcx=0 popq %r15 popq %r14 popq %r13 popq %r12 popq %rbp popq %rbx - .endm - - .macro POP_C_REGS + .if \skip_r11rcx + popq %rsi + .else popq %r11 + .endif popq %r10 popq %r9 popq %r8 popq %rax + .if \skip_r11rcx + popq %rsi + .else popq %rcx + .endif popq %rdx popq %rsi + .if \pop_rdi popq %rdi + .endif .endm

.macro icebp --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -330,15 +330,7 @@ GLOBAL(entry_SYSCALL_64_after_hwframe) syscall_return_via_sysret: /* rcx and r11 are already restored (see code above) */ UNWIND_HINT_EMPTY - POP_EXTRA_REGS - popq %rsi /* skip r11 */ - popq %r10 - popq %r9 - popq %r8 - popq %rax - popq %rsi /* skip rcx */ - popq %rdx - popq %rsi + POP_REGS pop_rdi=0 skip_r11rcx=1

/* * Now all regs are restored except RSP and RDI. @@ -631,15 +623,7 @@ GLOBAL(swapgs_restore_regs_and_return_to ud2 1: #endif - POP_EXTRA_REGS - popq %r11 - popq %r10 - popq %r9 - popq %r8 - popq %rax - popq %rcx - popq %rdx - popq %rsi + POP_REGS pop_rdi=0

/* * The stack is now user RDI, orig_ax, RIP, CS, EFLAGS, RSP, SS. @@ -697,8 +681,7 @@ GLOBAL(restore_regs_and_return_to_kernel ud2 1: #endif - POP_EXTRA_REGS - POP_C_REGS + POP_REGS addq $8, %rsp /* skip regs->orig_ax */ INTERRUPT_RETURN

@@ -1655,8 +1638,7 @@ end_repeat_nmi: nmi_swapgs: SWAPGS_UNSAFE_STACK nmi_restore: - POP_EXTRA_REGS - POP_C_REGS + POP_REGS

/* * Skip orig_ax and the "outermost" frame to point RSP at the "iret"

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dominik Brodowski linux@dominikbrodowski.net

commit 3f01daecd545e818098d84fd1ad43e19a508d705 upstream.

Those instances where ALLOC_PT_GPREGS_ON_STACK is called just before SAVE_AND_CLEAR_REGS can trivially be replaced by PUSH_AND_CLEAN_REGS. This macro uses PUSH instead of MOV and should therefore be faster, at least on newer CPUs.

Suggested-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Dominik Brodowski linux@dominikbrodowski.net Cc: Andy Lutomirski luto@kernel.org Cc: Borislav Petkov bp@alien8.de Cc: Brian Gerst brgerst@gmail.com Cc: Denys Vlasenko dvlasenk@redhat.com Cc: H. Peter Anvin hpa@zytor.com Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: dan.j.williams@intel.com Link: http://lkml.kernel.org/r/20180211104949.12992-5-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/entry/calling.h | 36 ++++++++++++++++++++++++++++++++++++ arch/x86/entry/entry_64.S | 6 ++---- 2 files changed, 38 insertions(+), 4 deletions(-)

--- a/arch/x86/entry/calling.h +++ b/arch/x86/entry/calling.h @@ -137,6 +137,42 @@ For 32-bit we have the following convent UNWIND_HINT_REGS offset=\offset .endm

+ .macro PUSH_AND_CLEAR_REGS + /* + * Push registers and sanitize registers of values that a + * speculation attack might otherwise want to exploit. The + * lower registers are likely clobbered well before they + * could be put to use in a speculative execution gadget. + * Interleave XOR with PUSH for better uop scheduling: + */ + pushq %rdi /* pt_regs->di */ + pushq %rsi /* pt_regs->si */ + pushq %rdx /* pt_regs->dx */ + pushq %rcx /* pt_regs->cx */ + pushq %rax /* pt_regs->ax */ + pushq %r8 /* pt_regs->r8 */ + xorq %r8, %r8 /* nospec r8 */ + pushq %r9 /* pt_regs->r9 */ + xorq %r9, %r9 /* nospec r9 */ + pushq %r10 /* pt_regs->r10 */ + xorq %r10, %r10 /* nospec r10 */ + pushq %r11 /* pt_regs->r11 */ + xorq %r11, %r11 /* nospec r11*/ + pushq %rbx /* pt_regs->rbx */ + xorl %ebx, %ebx /* nospec rbx*/ + pushq %rbp /* pt_regs->rbp */ + xorl %ebp, %ebp /* nospec rbp*/ + pushq %r12 /* pt_regs->r12 */ + xorq %r12, %r12 /* nospec r12*/ + pushq %r13 /* pt_regs->r13 */ + xorq %r13, %r13 /* nospec r13*/ + pushq %r14 /* pt_regs->r14 */ + xorq %r14, %r14 /* nospec r14*/ + pushq %r15 /* pt_regs->r15 */ + xorq %r15, %r15 /* nospec r15*/ + UNWIND_HINT_REGS + .endm + .macro POP_REGS pop_rdi=1 skip_r11rcx=0 popq %r15 popq %r14 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -560,8 +560,7 @@ END(irq_entries_start) call switch_to_thread_stack 1:

- ALLOC_PT_GPREGS_ON_STACK - SAVE_AND_CLEAR_REGS + PUSH_AND_CLEAR_REGS ENCODE_FRAME_POINTER

testb $3, CS(%rsp) @@ -1106,8 +1105,7 @@ ENTRY(xen_failsafe_callback) addq $0x30, %rsp UNWIND_HINT_IRET_REGS pushq $-1 /* orig_ax = -1 => not a system call */ - ALLOC_PT_GPREGS_ON_STACK - SAVE_AND_CLEAR_REGS + PUSH_AND_CLEAR_REGS ENCODE_FRAME_POINTER jmp error_exit END(xen_failsafe_callback)

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dominik Brodowski linux@dominikbrodowski.net

commit dde3036d62ba3375840b10ab9ec0d568fd773b07 upstream.

Previously, error_entry() and paranoid_entry() saved the GP registers onto stack space previously allocated by its callers. Combine these two steps in the callers, and use the generic PUSH_AND_CLEAR_REGS macro for that.

This adds a significant amount ot text size. However, Ingo Molnar points out that:

"these numbers also _very_ significantly over-represent the extra footprint. The assumptions that resulted in us compressing the IRQ entry code have changed very significantly with the new x86 IRQ allocation code we introduced in the last year:

- IRQ vectors are usually populated in tightly clustered groups.

With our new vector allocator code the typical per CPU allocation percentage on x86 systems is ~3 device vectors and ~10 fixed vectors out of ~220 vectors - i.e. a very low ~6% utilization (!). [...]

The days where we allocated a lot of vectors on every CPU and the compression of the IRQ entry code text mattered are over.

- Another issue is that only a small minority of vectors is frequent enough to actually matter to cache utilization in practice: 3-4 key IPIs and 1-2 device IRQs at most - and those vectors tend to be tightly clustered as well into about two groups, and are probably already on 2-3 cache lines in practice.

For the common case of 'cache cold' IRQs it's the depth of the call chain and the fragmentation of the resulting I$ that should be the main performance limit - not the overall size of it.

- The CPU side cost of IRQ delivery is still very expensive even in the best, most cached case, as in 'over a thousand cycles'. So much stuff is done that maybe contemporary x86 IRQ entry microcode already prefetches the IDT entry and its expected call target address."[*]

[*] http://lkml.kernel.org/r/20180208094710.qnjixhm6hybebdv7@gmail.com

The "testb $3, CS(%rsp)" instruction in the idtentry macro does not need modification. Previously, %rsp was manually decreased by 15*8; with this patch, %rsp is decreased by 15 pushq instructions.

[jpoimboe@redhat.com: unwind hint improvements]

Suggested-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Dominik Brodowski linux@dominikbrodowski.net Cc: Andy Lutomirski luto@kernel.org Cc: Borislav Petkov bp@alien8.de Cc: Brian Gerst brgerst@gmail.com Cc: Denys Vlasenko dvlasenk@redhat.com Cc: H. Peter Anvin hpa@zytor.com Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: dan.j.williams@intel.com Link: http://lkml.kernel.org/r/20180211104949.12992-7-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/entry/calling.h | 42 +----------------------------------------- arch/x86/entry/entry_64.S | 20 +++++++++----------- 2 files changed, 10 insertions(+), 52 deletions(-)

--- a/arch/x86/entry/calling.h +++ b/arch/x86/entry/calling.h @@ -97,46 +97,6 @@ For 32-bit we have the following convent

#define SIZEOF_PTREGS 21*8

- .macro ALLOC_PT_GPREGS_ON_STACK - addq $-(15*8), %rsp - .endm - - .macro SAVE_AND_CLEAR_REGS offset=0 - /* - * Save registers and sanitize registers of values that a - * speculation attack might otherwise want to exploit. The - * lower registers are likely clobbered well before they - * could be put to use in a speculative execution gadget. - * Interleave XOR with PUSH for better uop scheduling: - */ - movq %rdi, 14*8+\offset(%rsp) - movq %rsi, 13*8+\offset(%rsp) - movq %rdx, 12*8+\offset(%rsp) - movq %rcx, 11*8+\offset(%rsp) - movq %rax, 10*8+\offset(%rsp) - movq %r8, 9*8+\offset(%rsp) - xorq %r8, %r8 /* nospec r8 */ - movq %r9, 8*8+\offset(%rsp) - xorq %r9, %r9 /* nospec r9 */ - movq %r10, 7*8+\offset(%rsp) - xorq %r10, %r10 /* nospec r10 */ - movq %r11, 6*8+\offset(%rsp) - xorq %r11, %r11 /* nospec r11 */ - movq %rbx, 5*8+\offset(%rsp) - xorl %ebx, %ebx /* nospec rbx */ - movq %rbp, 4*8+\offset(%rsp) - xorl %ebp, %ebp /* nospec rbp */ - movq %r12, 3*8+\offset(%rsp) - xorq %r12, %r12 /* nospec r12 */ - movq %r13, 2*8+\offset(%rsp) - xorq %r13, %r13 /* nospec r13 */ - movq %r14, 1*8+\offset(%rsp) - xorq %r14, %r14 /* nospec r14 */ - movq %r15, 0*8+\offset(%rsp) - xorq %r15, %r15 /* nospec r15 */ - UNWIND_HINT_REGS offset=\offset - .endm - .macro PUSH_AND_CLEAR_REGS rdx=%rdx rax=%rax /* * Push registers and sanitize registers of values that a @@ -211,7 +171,7 @@ For 32-bit we have the following convent * is just setting the LSB, which makes it an invalid stack address and is also * a signal to the unwinder that it's a pt_regs pointer in disguise. * - * NOTE: This macro must be used *after* SAVE_AND_CLEAR_REGS because it corrupts + * NOTE: This macro must be used *after* PUSH_AND_CLEAR_REGS because it corrupts * the original rbp. */ .macro ENCODE_FRAME_POINTER ptregs_offset=0 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -867,7 +867,9 @@ ENTRY(\sym) pushq $-1 /* ORIG_RAX: no syscall to restart */ .endif

- ALLOC_PT_GPREGS_ON_STACK + /* Save all registers in pt_regs */ + PUSH_AND_CLEAR_REGS + ENCODE_FRAME_POINTER

.if \paranoid < 2 testb $3, CS(%rsp) /* If coming from userspace, switch stacks */ @@ -1115,15 +1117,12 @@ idtentry machine_check do_mce has_err #endif

/* - * Save all registers in pt_regs, and switch gs if needed. + * Switch gs if needed. * Use slow, but surefire "are we in kernel?" check. * Return: ebx=0: need swapgs on exit, ebx=1: otherwise */ ENTRY(paranoid_entry) - UNWIND_HINT_FUNC cld - SAVE_AND_CLEAR_REGS 8 - ENCODE_FRAME_POINTER 8 movl $1, %ebx movl $MSR_GS_BASE, %ecx rdmsr @@ -1136,7 +1135,7 @@ ENTRY(paranoid_entry) SAVE_AND_SWITCH_TO_KERNEL_CR3 scratch_reg=%rax save_reg=%r14

ret -END(paranoid_entry) +ENDPROC(paranoid_entry)

/* * "Paranoid" exit path from exception stack. This is invoked @@ -1167,14 +1166,12 @@ ENTRY(paranoid_exit) END(paranoid_exit)

/* - * Save all registers in pt_regs, and switch gs if needed. + * Switch gs if needed. * Return: EBX=0: came from user mode; EBX=1: otherwise */ ENTRY(error_entry) - UNWIND_HINT_FUNC + UNWIND_HINT_REGS offset=8 cld - SAVE_AND_CLEAR_REGS 8 - ENCODE_FRAME_POINTER 8 testb $3, CS+8(%rsp) jz .Lerror_kernelspace

@@ -1565,7 +1562,8 @@ end_repeat_nmi: * frame to point back to repeat_nmi. */ pushq $-1 /* ORIG_RAX: no syscall to restart */ - ALLOC_PT_GPREGS_ON_STACK + PUSH_AND_CLEAR_REGS + ENCODE_FRAME_POINTER

/* * Use paranoid_entry to handle SWAPGS, but no need to use paranoid_exit

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Josh Poimboeuf jpoimboe@redhat.com

commit b3ccefaed922529e6a67de7b30af5aa38c76ace9 upstream.

With the following commit:

f09d160992d1 ("x86/entry/64: Get rid of the ALLOC_PT_GPREGS_ON_STACK and SAVE_AND_CLEAR_REGS macros")

... one of my suggested improvements triggered a frame pointer warning:

arch/x86/entry/entry_64.o: warning: objtool: paranoid_entry()+0x11: call without frame pointer save/setup

The warning is correct for the build-time code, but it's actually not relevant at runtime because of paravirt patching. The paravirt swapgs call gets replaced with either a SWAPGS instruction or NOPs at runtime.

Go back to the previous behavior by removing the ELF function annotation for paranoid_entry() and adding an unwind hint, which effectively silences the warning.

Reported-by: kbuild test robot fengguang.wu@intel.com Signed-off-by: Josh Poimboeuf jpoimboe@redhat.com Cc: Dominik Brodowski linux@dominikbrodowski.net Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: kbuild-all@01.org Cc: tipbuild@zytor.com Fixes: f09d160992d1 ("x86/entry/64: Get rid of the ALLOC_PT_GPREGS_ON_STACK and SAVE_AND_CLEAR_REGS macros") Link: http://lkml.kernel.org/r/20180212174503.5acbymg5z6p32snu@treble Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/entry/entry_64.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -1122,6 +1122,7 @@ idtentry machine_check do_mce has_err * Return: ebx=0: need swapgs on exit, ebx=1: otherwise */ ENTRY(paranoid_entry) + UNWIND_HINT_FUNC cld movl $1, %ebx movl $MSR_GS_BASE, %ecx @@ -1135,7 +1136,7 @@ ENTRY(paranoid_entry) SAVE_AND_SWITCH_TO_KERNEL_CR3 scratch_reg=%rax save_reg=%r14

ret -ENDPROC(paranoid_entry) +END(paranoid_entry)

/* * "Paranoid" exit path from exception stack. This is invoked

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dominik Brodowski linux@dominikbrodowski.net

commit 198ee8e17502da2634f7366395db1d77630e0219 upstream.

The vDSO selftest tries to execute a vsyscall unconditionally, even if it is not present on the test system (e.g. if booted with vsyscall=none or with CONFIG_LEGACY_VSYSCALL_NONE=y set. Fix this by copying (and tweaking) the vsyscall check from test_vsyscall.c

Signed-off-by: Dominik Brodowski linux@dominikbrodowski.net Cc: Andrew Lutomirski luto@kernel.org Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: linux-kselftest@vger.kernel.org Cc: shuah@kernel.org Link: http://lkml.kernel.org/r/20180211111013.16888-3-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- tools/testing/selftests/x86/test_vdso.c | 50 +++++++++++++++++++++++++++----- 1 file changed, 43 insertions(+), 7 deletions(-)

--- a/tools/testing/selftests/x86/test_vdso.c +++ b/tools/testing/selftests/x86/test_vdso.c @@ -28,18 +28,52 @@

int nerrs = 0;

+typedef long (*getcpu_t)(unsigned *, unsigned *, void *); + +getcpu_t vgetcpu; +getcpu_t vdso_getcpu; + +static void *vsyscall_getcpu(void) +{ #ifdef __x86_64__ -# define VSYS(x) (x) + FILE *maps; + char line[128]; + bool found = false; + + maps = fopen("/proc/self/maps", "r"); + if (!maps) /* might still be present, but ignore it here, as we test vDSO not vsyscall */ + return NULL; + + while (fgets(line, sizeof(line), maps)) { + char r, x; + void *start, *end; + char name[128]; + if (sscanf(line, "%p-%p %c-%cp %*x %*x:%*x %*u %s", + &start, &end, &r, &x, name) != 5) + continue; + + if (strcmp(name, "[vsyscall]")) + continue; + + /* assume entries are OK, as we test vDSO here not vsyscall */ + found = true; + break; + } + + fclose(maps); + + if (!found) { + printf("Warning: failed to find vsyscall getcpu\n"); + return NULL; + } + return (void *) (0xffffffffff600800); #else -# define VSYS(x) 0 + return NULL; #endif +}

-typedef long (*getcpu_t)(unsigned *, unsigned *, void *); - -const getcpu_t vgetcpu = (getcpu_t)VSYS(0xffffffffff600800); -getcpu_t vdso_getcpu;

-void fill_function_pointers() +static void fill_function_pointers() { void *vdso = dlopen("linux-vdso.so.1", RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD); @@ -54,6 +88,8 @@ void fill_function_pointers() vdso_getcpu = (getcpu_t)dlsym(vdso, "__vdso_getcpu"); if (!vdso_getcpu) printf("Warning: failed to find getcpu in vDSO\n"); + + vgetcpu = (getcpu_t) vsyscall_getcpu(); }

static long sys_getcpu(unsigned * cpu, unsigned * node,

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dominik Brodowski linux@dominikbrodowski.net

commit 2cbc0d66de0480449c75636f55697c7ff3af61fc upstream.

On 64-bit builds, we should not rely on "int $0x80" working (it only does if CONFIG_IA32_EMULATION=y is enabled).

Without this patch, the move test may succeed, but the "int $0x80" causes a segfault, resulting in a false negative output of this self-test.

Signed-off-by: Dominik Brodowski linux@dominikbrodowski.net Cc: Andy Lutomirski luto@kernel.org Cc: Dmitry Safonov dsafonov@virtuozzo.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: linux-kselftest@vger.kernel.org Cc: shuah@kernel.org Link: http://lkml.kernel.org/r/20180211111013.16888-4-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- tools/testing/selftests/x86/test_mremap_vdso.c | 4 ++++ 1 file changed, 4 insertions(+)

--- a/tools/testing/selftests/x86/test_mremap_vdso.c +++ b/tools/testing/selftests/x86/test_mremap_vdso.c @@ -90,8 +90,12 @@ int main(int argc, char **argv, char **e vdso_size += PAGE_SIZE; }

+#ifdef __i386__ /* Glibc is likely to explode now - exit with raw syscall */ asm volatile ("int $0x80" : : "a" (__NR_exit), "b" (!!ret)); +#else /* __x86_64__ */ + syscall(SYS_exit, ret); +#endif } else { int status;

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dominik Brodowski linux@dominikbrodowski.net

commit 9279ddf23ce78ff2676e8e8e19fec0f022c26d04 upstream.

The ldt_gdt and ptrace_syscall selftests, even in their 64-bit variant, use hard-coded 32-bit syscall numbers and call "int $0x80".

This will fail on 64-bit systems with CONFIG_IA32_EMULATION=y disabled.

Therefore, do not build these tests if we cannot build 32-bit binaries (which should be a good approximation for CONFIG_IA32_EMULATION=y being enabled).

Signed-off-by: Dominik Brodowski linux@dominikbrodowski.net Cc: Andy Lutomirski luto@kernel.org Cc: Dmitry Safonov dsafonov@virtuozzo.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: linux-kselftest@vger.kernel.org Cc: shuah@kernel.org Link: http://lkml.kernel.org/r/20180211111013.16888-6-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- tools/testing/selftests/x86/Makefile | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-)

--- a/tools/testing/selftests/x86/Makefile +++ b/tools/testing/selftests/x86/Makefile @@ -5,16 +5,26 @@ include ../lib.mk

.PHONY: all all_32 all_64 warn_32bit_failure clean

-TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs syscall_nt ptrace_syscall test_mremap_vdso \ - check_initial_reg_state sigreturn ldt_gdt iopl mpx-mini-test ioperm \ +UNAME_M := $(shell uname -m) +CAN_BUILD_I386 := $(shell ./check_cc.sh $(CC) trivial_32bit_program.c -m32) +CAN_BUILD_X86_64 := $(shell ./check_cc.sh $(CC) trivial_64bit_program.c) + +TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs syscall_nt test_mremap_vdso \ + check_initial_reg_state sigreturn iopl mpx-mini-test ioperm \ protection_keys test_vdso test_vsyscall TARGETS_C_32BIT_ONLY := entry_from_vm86 syscall_arg_fault test_syscall_vdso unwind_vdso \ test_FCMOV test_FCOMI test_FISTTP \ vdso_restorer TARGETS_C_64BIT_ONLY := fsgsbase sysret_rip +# Some selftests require 32bit support enabled also on 64bit systems +TARGETS_C_32BIT_NEEDED := ldt_gdt ptrace_syscall

-TARGETS_C_32BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_32BIT_ONLY) +TARGETS_C_32BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_32BIT_ONLY) $(TARGETS_C_32BIT_NEEDED) TARGETS_C_64BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_64BIT_ONLY) +ifeq ($(CAN_BUILD_I386)$(CAN_BUILD_X86_64),11) +TARGETS_C_64BIT_ALL += $(TARGETS_C_32BIT_NEEDED) +endif + BINARIES_32 := $(TARGETS_C_32BIT_ALL:%=%_32) BINARIES_64 := $(TARGETS_C_64BIT_ALL:%=%_64)

@@ -23,10 +33,6 @@ BINARIES_64 := $(patsubst %,$(OUTPUT)/%,

CFLAGS := -O2 -g -std=gnu99 -pthread -Wall -no-pie

-UNAME_M := $(shell uname -m) -CAN_BUILD_I386 := $(shell ./check_cc.sh $(CC) trivial_32bit_program.c -m32) -CAN_BUILD_X86_64 := $(shell ./check_cc.sh $(CC) trivial_64bit_program.c) - ifeq ($(CAN_BUILD_I386),1) all: all_32 TEST_PROGS += $(BINARIES_32)

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Josh Poimboeuf jpoimboe@redhat.com

commit 2b5db66862b95532cb6cca8165ae6eb73633cf85 upstream.

By default, objtool assumes that a UD2 is a dead end. This is mainly because GCC 7+ sometimes inserts a UD2 when it detects a divide-by-zero condition.

Now that WARN() is moving back to UD2, annotate the code after it as reachable so objtool can follow the code flow.

Reported-by: Borislav Petkov bp@alien8.de Signed-off-by: Josh Poimboeuf jpoimboe@redhat.com Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Cc: Andy Lutomirski luto@kernel.org Cc: Arjan van de Ven arjan@linux.intel.com Cc: Brian Gerst brgerst@gmail.com Cc: Denys Vlasenko dvlasenk@redhat.com Cc: H. Peter Anvin hpa@zytor.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: kbuild test robot fengguang.wu@intel.com Link: http://lkml.kernel.org/r/0e483379275a42626ba8898117f918e1bf661e40.1518130694... Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/include/asm/bug.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/arch/x86/include/asm/bug.h +++ b/arch/x86/include/asm/bug.h @@ -77,7 +77,11 @@ do { \ unreachable(); \ } while (0)

-#define __WARN_FLAGS(flags) _BUG_FLAGS(ASM_UD0, BUGFLAG_WARNING|(flags)) +#define __WARN_FLAGS(flags) \ +do { \ + _BUG_FLAGS(ASM_UD0, BUGFLAG_WARNING|(flags)); \ + annotate_reachable(); \ +} while (0)

#include <asm-generic/bug.h>

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dan Williams dan.j.williams@intel.com

commit be3233fbfcb8f5acb6e3bcd0895c3ef9e100d470 upstream.

Allow the compiler to handle @size as an immediate value or memory directly rather than allocating a register.

Reported-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Dan Williams dan.j.williams@intel.com Cc: Andy Lutomirski luto@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Link: http://lkml.kernel.org/r/151797010204.1289.1510000292250184993.stgit@dwillia... Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/include/asm/barrier.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/include/asm/barrier.h +++ b/arch/x86/include/asm/barrier.h @@ -40,7 +40,7 @@ static inline unsigned long array_index_

asm ("cmp %1,%2; sbb %0,%0;" :"=r" (mask) - :"r"(size),"r" (index) + :"g"(size),"r" (index) :"cc"); return mask; }

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Peter Zijlstra peterz@infradead.org

commit ea00f301285ea2f07393678cd2b6057878320c9d upstream.

Joe Konno reported a compile failure resulting from using an MSR without inclusion of <asm/msr-index.h>, and while the current code builds fine (by accident) this needs fixing for future patches.

Reported-by: Joe Konno joe.konno@linux.intel.com Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: arjan@linux.intel.com Cc: bp@alien8.de Cc: dan.j.williams@intel.com Cc: dave.hansen@linux.intel.com Cc: dwmw2@infradead.org Cc: dwmw@amazon.co.uk Cc: gregkh@linuxfoundation.org Cc: hpa@zytor.com Cc: jpoimboe@redhat.com Cc: linux-tip-commits@vger.kernel.org Cc: luto@kernel.org Fixes: 20ffa1caecca ("x86/speculation: Add basic IBPB (Indirect Branch Prediction Barrier) support") Link: http://lkml.kernel.org/r/20180213132819.GJ25201@hirez.programming.kicks-ass.... Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/include/asm/nospec-branch.h | 1 + 1 file changed, 1 insertion(+)

--- a/arch/x86/include/asm/nospec-branch.h +++ b/arch/x86/include/asm/nospec-branch.h @@ -6,6 +6,7 @@ #include <asm/alternative.h> #include <asm/alternative-asm.h> #include <asm/cpufeatures.h> +#include <asm/msr-index.h>

#ifdef __ASSEMBLY__

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Levin, Alexander (Sasha Levin) alexander.levin@verizon.com

commit 75f296d93bcebcfe375884ddac79e30263a31766 upstream.

Convert all allocations that used a NOTRACK flag to stop using it.

Link: http://lkml.kernel.org/r/20171007030159.22241-3-alexander.levin@verizon.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Cc: Alexander Potapenko glider@google.com Cc: Eric W. Biederman ebiederm@xmission.com Cc: Michal Hocko mhocko@kernel.org Cc: Pekka Enberg penberg@kernel.org Cc: Steven Rostedt rostedt@goodmis.org Cc: Tim Hansen devtimhansen@gmail.com Cc: Vegard Nossum vegardno@ifi.uio.no Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/arm/include/asm/pgalloc.h | 2 +- arch/arm64/include/asm/pgalloc.h | 2 +- arch/powerpc/include/asm/pgalloc.h | 2 +- arch/sh/kernel/dwarf.c | 4 ++-- arch/sh/kernel/process.c | 2 +- arch/sparc/mm/init_64.c | 4 ++-- arch/unicore32/include/asm/pgalloc.h | 2 +- arch/x86/kernel/espfix_64.c | 2 +- arch/x86/mm/init.c | 3 +-- arch/x86/mm/init_64.c | 2 +- arch/x86/mm/pageattr.c | 10 +++++----- arch/x86/mm/pgtable.c | 2 +- arch/x86/platform/efi/efi_64.c | 2 +- crypto/xor.c | 7 +------ include/linux/thread_info.h | 5 ++--- init/do_mounts.c | 3 +-- kernel/fork.c | 12 ++++++------ kernel/signal.c | 3 +-- mm/kmemcheck.c | 2 +- mm/slab.c | 2 +- mm/slab.h | 5 ++--- mm/slab_common.c | 2 +- mm/slub.c | 4 +--- 23 files changed, 36 insertions(+), 48 deletions(-)

--- a/arch/arm/include/asm/pgalloc.h +++ b/arch/arm/include/asm/pgalloc.h @@ -57,7 +57,7 @@ static inline void pud_populate(struct m extern pgd_t *pgd_alloc(struct mm_struct *mm); extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);

-#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) +#define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO)

static inline void clean_pte_table(pte_t *pte) { --- a/arch/arm64/include/asm/pgalloc.h +++ b/arch/arm64/include/asm/pgalloc.h @@ -26,7 +26,7 @@

#define check_pgt_cache() do { } while (0)

-#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) +#define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO) #define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t))

#if CONFIG_PGTABLE_LEVELS > 2 --- a/arch/powerpc/include/asm/pgalloc.h +++ b/arch/powerpc/include/asm/pgalloc.h @@ -18,7 +18,7 @@ static inline gfp_t pgtable_gfp_flags(st } #endif /* MODULE */

-#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) +#define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO)

#ifdef CONFIG_PPC_BOOK3S #include <asm/book3s/pgalloc.h> --- a/arch/sh/kernel/dwarf.c +++ b/arch/sh/kernel/dwarf.c @@ -1172,11 +1172,11 @@ static int __init dwarf_unwinder_init(vo

dwarf_frame_cachep = kmem_cache_create("dwarf_frames", sizeof(struct dwarf_frame), 0, - SLAB_PANIC | SLAB_HWCACHE_ALIGN | SLAB_NOTRACK, NULL); + SLAB_PANIC | SLAB_HWCACHE_ALIGN, NULL);

dwarf_reg_cachep = kmem_cache_create("dwarf_regs", sizeof(struct dwarf_reg), 0, - SLAB_PANIC | SLAB_HWCACHE_ALIGN | SLAB_NOTRACK, NULL); + SLAB_PANIC | SLAB_HWCACHE_ALIGN, NULL);

dwarf_frame_pool = mempool_create_slab_pool(DWARF_FRAME_MIN_REQ, dwarf_frame_cachep); --- a/arch/sh/kernel/process.c +++ b/arch/sh/kernel/process.c @@ -59,7 +59,7 @@ void arch_task_cache_init(void)

task_xstate_cachep = kmem_cache_create("task_xstate", xstate_size, __alignof__(union thread_xstate), - SLAB_PANIC | SLAB_NOTRACK, NULL); + SLAB_PANIC, NULL); }

#ifdef CONFIG_SH_FPU_EMU --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -2934,7 +2934,7 @@ void __flush_tlb_all(void) pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) { - struct page *page = alloc_page(GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO); + struct page *page = alloc_page(GFP_KERNEL | __GFP_ZERO); pte_t *pte = NULL;

if (page) @@ -2946,7 +2946,7 @@ pte_t *pte_alloc_one_kernel(struct mm_st pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) { - struct page *page = alloc_page(GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO); + struct page *page = alloc_page(GFP_KERNEL | __GFP_ZERO); if (!page) return NULL; if (!pgtable_page_ctor(page)) { --- a/arch/unicore32/include/asm/pgalloc.h +++ b/arch/unicore32/include/asm/pgalloc.h @@ -28,7 +28,7 @@ extern void free_pgd_slow(struct mm_stru #define pgd_alloc(mm) get_pgd_slow(mm) #define pgd_free(mm, pgd) free_pgd_slow(mm, pgd)

-#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) +#define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO)

/* * Allocate one PTE table. --- a/arch/x86/kernel/espfix_64.c +++ b/arch/x86/kernel/espfix_64.c @@ -57,7 +57,7 @@ # error "Need more virtual address space for the ESPFIX hack" #endif

-#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) +#define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO)

/* This contains the *bottom* address of the espfix stack */ DEFINE_PER_CPU_READ_MOSTLY(unsigned long, espfix_stack); --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -93,8 +93,7 @@ __ref void *alloc_low_pages(unsigned int unsigned int order;

order = get_order((unsigned long)num << PAGE_SHIFT); - return (void *)__get_free_pages(GFP_ATOMIC | __GFP_NOTRACK | - __GFP_ZERO, order); + return (void *)__get_free_pages(GFP_ATOMIC | __GFP_ZERO, order); }

if ((pgt_buf_end + num) > pgt_buf_top || !can_use_brk_pgt) { --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -184,7 +184,7 @@ static __ref void *spp_getpage(void) void *ptr;

if (after_bootmem) - ptr = (void *) get_zeroed_page(GFP_ATOMIC | __GFP_NOTRACK); + ptr = (void *) get_zeroed_page(GFP_ATOMIC); else ptr = alloc_bootmem_pages(PAGE_SIZE);

--- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -753,7 +753,7 @@ static int split_large_page(struct cpa_d

if (!debug_pagealloc_enabled()) spin_unlock(&cpa_lock); - base = alloc_pages(GFP_KERNEL | __GFP_NOTRACK, 0); + base = alloc_pages(GFP_KERNEL, 0); if (!debug_pagealloc_enabled()) spin_lock(&cpa_lock); if (!base) @@ -904,7 +904,7 @@ static void unmap_pud_range(p4d_t *p4d,

static int alloc_pte_page(pmd_t *pmd) { - pte_t *pte = (pte_t *)get_zeroed_page(GFP_KERNEL | __GFP_NOTRACK); + pte_t *pte = (pte_t *)get_zeroed_page(GFP_KERNEL); if (!pte) return -1;

@@ -914,7 +914,7 @@ static int alloc_pte_page(pmd_t *pmd)

static int alloc_pmd_page(pud_t *pud) { - pmd_t *pmd = (pmd_t *)get_zeroed_page(GFP_KERNEL | __GFP_NOTRACK); + pmd_t *pmd = (pmd_t *)get_zeroed_page(GFP_KERNEL); if (!pmd) return -1;

@@ -1120,7 +1120,7 @@ static int populate_pgd(struct cpa_data pgd_entry = cpa->pgd + pgd_index(addr);

if (pgd_none(*pgd_entry)) { - p4d = (p4d_t *)get_zeroed_page(GFP_KERNEL | __GFP_NOTRACK); + p4d = (p4d_t *)get_zeroed_page(GFP_KERNEL); if (!p4d) return -1;

@@ -1132,7 +1132,7 @@ static int populate_pgd(struct cpa_data */ p4d = p4d_offset(pgd_entry, addr); if (p4d_none(*p4d)) { - pud = (pud_t *)get_zeroed_page(GFP_KERNEL | __GFP_NOTRACK); + pud = (pud_t *)get_zeroed_page(GFP_KERNEL); if (!pud) return -1;

--- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -7,7 +7,7 @@ #include <asm/fixmap.h> #include <asm/mtrr.h>

-#define PGALLOC_GFP (GFP_KERNEL_ACCOUNT | __GFP_NOTRACK | __GFP_ZERO) +#define PGALLOC_GFP (GFP_KERNEL_ACCOUNT | __GFP_ZERO)

#ifdef CONFIG_HIGHPTE #define PGALLOC_USER_GFP __GFP_HIGHMEM --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -211,7 +211,7 @@ int __init efi_alloc_page_tables(void) if (efi_enabled(EFI_OLD_MEMMAP)) return 0;

- gfp_mask = GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO; + gfp_mask = GFP_KERNEL | __GFP_ZERO; efi_pgd = (pgd_t *)__get_free_pages(gfp_mask, PGD_ALLOCATION_ORDER); if (!efi_pgd) return -ENOMEM; --- a/crypto/xor.c +++ b/crypto/xor.c @@ -122,12 +122,7 @@ calibrate_xor_blocks(void) goto out; }

- /* - * Note: Since the memory is not actually used for _anything_ but to - * test the XOR speed, we don't really want kmemcheck to warn about - * reading uninitialized bytes here. - */ - b1 = (void *) __get_free_pages(GFP_KERNEL | __GFP_NOTRACK, 2); + b1 = (void *) __get_free_pages(GFP_KERNEL, 2); if (!b1) { printk(KERN_WARNING "xor: Yikes! No memory available.\n"); return -ENOMEM; --- a/include/linux/thread_info.h +++ b/include/linux/thread_info.h @@ -44,10 +44,9 @@ enum { #endif

#if IS_ENABLED(CONFIG_DEBUG_STACK_USAGE) || IS_ENABLED(CONFIG_DEBUG_KMEMLEAK) -# define THREADINFO_GFP (GFP_KERNEL_ACCOUNT | __GFP_NOTRACK | \ - __GFP_ZERO) +# define THREADINFO_GFP (GFP_KERNEL_ACCOUNT | __GFP_ZERO) #else -# define THREADINFO_GFP (GFP_KERNEL_ACCOUNT | __GFP_NOTRACK) +# define THREADINFO_GFP (GFP_KERNEL_ACCOUNT) #endif

/* --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -380,8 +380,7 @@ static int __init do_mount_root(char *na

void __init mount_block_root(char *name, int flags) { - struct page *page = alloc_page(GFP_KERNEL | - __GFP_NOTRACK_FALSE_POSITIVE); + struct page *page = alloc_page(GFP_KERNEL); char *fs_names = page_address(page); char *p; #ifdef CONFIG_BLOCK --- a/kernel/fork.c +++ b/kernel/fork.c @@ -469,7 +469,7 @@ void __init fork_init(void) /* create a slab on which task_structs can be allocated */ task_struct_cachep = kmem_cache_create("task_struct", arch_task_struct_size, align, - SLAB_PANIC|SLAB_NOTRACK|SLAB_ACCOUNT, NULL); + SLAB_PANIC|SLAB_ACCOUNT, NULL); #endif

/* do the arch specific task caches init */ @@ -2208,18 +2208,18 @@ void __init proc_caches_init(void) sighand_cachep = kmem_cache_create("sighand_cache", sizeof(struct sighand_struct), 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_TYPESAFE_BY_RCU| - SLAB_NOTRACK|SLAB_ACCOUNT, sighand_ctor); + SLAB_ACCOUNT, sighand_ctor); signal_cachep = kmem_cache_create("signal_cache", sizeof(struct signal_struct), 0, - SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK|SLAB_ACCOUNT, + SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT, NULL); files_cachep = kmem_cache_create("files_cache", sizeof(struct files_struct), 0, - SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK|SLAB_ACCOUNT, + SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT, NULL); fs_cachep = kmem_cache_create("fs_cache", sizeof(struct fs_struct), 0, - SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK|SLAB_ACCOUNT, + SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT, NULL); /* * FIXME! The "sizeof(struct mm_struct)" currently includes the @@ -2230,7 +2230,7 @@ void __init proc_caches_init(void) */ mm_cachep = kmem_cache_create("mm_struct", sizeof(struct mm_struct), ARCH_MIN_MMSTRUCT_ALIGN, - SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK|SLAB_ACCOUNT, + SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT, NULL); vm_area_cachep = KMEM_CACHE(vm_area_struct, SLAB_PANIC|SLAB_ACCOUNT); mmap_init(); --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1038,8 +1038,7 @@ static int __send_signal(int sig, struct else override_rlimit = 0;

- q = __sigqueue_alloc(sig, t, GFP_ATOMIC | __GFP_NOTRACK_FALSE_POSITIVE, - override_rlimit); + q = __sigqueue_alloc(sig, t, GFP_ATOMIC, override_rlimit); if (q) { list_add_tail(&q->list, &pending->list); switch ((unsigned long) info) { --- a/mm/kmemcheck.c +++ b/mm/kmemcheck.c @@ -18,7 +18,7 @@ void kmemcheck_alloc_shadow(struct page * With kmemcheck enabled, we need to allocate a memory area for the * shadow bits as well. */ - shadow = alloc_pages_node(node, flags | __GFP_NOTRACK, order); + shadow = alloc_pages_node(node, flags, order); if (!shadow) { if (printk_ratelimit()) pr_err("kmemcheck: failed to allocate shadow bitmap\n"); --- a/mm/slab.c +++ b/mm/slab.c @@ -1412,7 +1412,7 @@ static struct page *kmem_getpages(struct if (cachep->flags & SLAB_RECLAIM_ACCOUNT) flags |= __GFP_RECLAIMABLE;

- page = __alloc_pages_node(nodeid, flags | __GFP_NOTRACK, cachep->gfporder); + page = __alloc_pages_node(nodeid, flags, cachep->gfporder); if (!page) { slab_out_of_memory(cachep, flags, nodeid); return NULL; --- a/mm/slab.h +++ b/mm/slab.h @@ -141,10 +141,10 @@ static inline unsigned long kmem_cache_f #if defined(CONFIG_SLAB) #define SLAB_CACHE_FLAGS (SLAB_MEM_SPREAD | SLAB_NOLEAKTRACE | \ SLAB_RECLAIM_ACCOUNT | SLAB_TEMPORARY | \ - SLAB_NOTRACK | SLAB_ACCOUNT) + SLAB_ACCOUNT) #elif defined(CONFIG_SLUB) #define SLAB_CACHE_FLAGS (SLAB_NOLEAKTRACE | SLAB_RECLAIM_ACCOUNT | \ - SLAB_TEMPORARY | SLAB_NOTRACK | SLAB_ACCOUNT) + SLAB_TEMPORARY | SLAB_ACCOUNT) #else #define SLAB_CACHE_FLAGS (0) #endif @@ -163,7 +163,6 @@ static inline unsigned long kmem_cache_f SLAB_NOLEAKTRACE | \ SLAB_RECLAIM_ACCOUNT | \ SLAB_TEMPORARY | \ - SLAB_NOTRACK | \ SLAB_ACCOUNT)

int __kmem_cache_shutdown(struct kmem_cache *); --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -44,7 +44,7 @@ static DECLARE_WORK(slab_caches_to_rcu_d SLAB_FAILSLAB | SLAB_KASAN)

#define SLAB_MERGE_SAME (SLAB_RECLAIM_ACCOUNT | SLAB_CACHE_DMA | \ - SLAB_NOTRACK | SLAB_ACCOUNT) + SLAB_ACCOUNT)

/* * Merge control. If this is set then no merging of slab caches will occur. --- a/mm/slub.c +++ b/mm/slub.c @@ -1434,8 +1434,6 @@ static inline struct page *alloc_slab_pa struct page *page; int order = oo_order(oo);

- flags |= __GFP_NOTRACK; - if (node == NUMA_NO_NODE) page = alloc_pages(flags, order); else @@ -3772,7 +3770,7 @@ static void *kmalloc_large_node(size_t s struct page *page; void *ptr = NULL;

- flags |= __GFP_COMP | __GFP_NOTRACK; + flags |= __GFP_COMP; page = alloc_pages_node(node, flags, get_order(size)); if (page) ptr = page_address(page);

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Levin, Alexander (Sasha Levin) alexander.levin@verizon.com

commit 4675ff05de2d76d167336b368bd07f3fef6ed5a6 upstream.

Fix up makefiles, remove references, and git rm kmemcheck.

Link: http://lkml.kernel.org/r/20171007030159.22241-4-alexander.levin@verizon.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Cc: Steven Rostedt rostedt@goodmis.org Cc: Vegard Nossum vegardno@ifi.uio.no Cc: Pekka Enberg penberg@kernel.org Cc: Michal Hocko mhocko@kernel.org Cc: Eric W. Biederman ebiederm@xmission.com Cc: Alexander Potapenko glider@google.com Cc: Tim Hansen devtimhansen@gmail.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- Documentation/admin-guide/kernel-parameters.txt | 7 Documentation/dev-tools/index.rst | 1 Documentation/dev-tools/kmemcheck.rst | 733 ------------------------ MAINTAINERS | 10 arch/x86/Kconfig | 3 arch/x86/include/asm/kmemcheck.h | 42 - arch/x86/include/asm/string_32.h | 9 arch/x86/include/asm/string_64.h | 8 arch/x86/kernel/cpu/intel.c | 15 arch/x86/mm/Makefile | 2 arch/x86/mm/init.c | 5 arch/x86/mm/kmemcheck/Makefile | 1 arch/x86/mm/kmemcheck/error.c | 227 ------- arch/x86/mm/kmemcheck/error.h | 15 arch/x86/mm/kmemcheck/kmemcheck.c | 658 --------------------- arch/x86/mm/kmemcheck/opcode.c | 106 --- arch/x86/mm/kmemcheck/opcode.h | 9 arch/x86/mm/kmemcheck/pte.c | 22 arch/x86/mm/kmemcheck/pte.h | 10 arch/x86/mm/kmemcheck/selftest.c | 70 -- arch/x86/mm/kmemcheck/selftest.h | 6 arch/x86/mm/kmemcheck/shadow.c | 173 ----- arch/x86/mm/kmemcheck/shadow.h | 18 include/linux/interrupt.h | 15 include/linux/kmemcheck.h | 171 ----- kernel/softirq.c | 10 kernel/sysctl.c | 10 lib/Kconfig.debug | 6 lib/Kconfig.kmemcheck | 94 --- mm/Kconfig.debug | 1 mm/Makefile | 2 mm/kmemcheck.c | 125 ---- mm/slub.c | 5 scripts/kernel-doc | 2 tools/include/linux/kmemcheck.h | 8 35 files changed, 7 insertions(+), 2592 deletions(-)

--- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1841,13 +1841,6 @@ Built with CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF=y, the default is off.

- kmemcheck= [X86] Boot-time kmemcheck enable/disable/one-shot mode - Valid arguments: 0, 1, 2 - kmemcheck=0 (disabled) - kmemcheck=1 (enabled) - kmemcheck=2 (one-shot mode) - Default: 2 (one-shot mode) - kvm.ignore_msrs=[KVM] Ignore guest accesses to unhandled MSRs. Default is 0 (don't ignore, but inject #GP)

--- a/Documentation/dev-tools/index.rst +++ b/Documentation/dev-tools/index.rst @@ -21,7 +21,6 @@ whole; patches welcome! kasan ubsan kmemleak - kmemcheck gdb-kernel-debugging kgdb kselftest --- a/Documentation/dev-tools/kmemcheck.rst +++ /dev/null @@ -1,733 +0,0 @@ -Getting started with kmemcheck -============================== - -Vegard Nossum vegardno@ifi.uio.no - - -Introduction ------------- - -kmemcheck is a debugging feature for the Linux Kernel. More specifically, it -is a dynamic checker that detects and warns about some uses of uninitialized -memory. - -Userspace programmers might be familiar with Valgrind's memcheck. The main -difference between memcheck and kmemcheck is that memcheck works for userspace -programs only, and kmemcheck works for the kernel only. The implementations -are of course vastly different. Because of this, kmemcheck is not as accurate -as memcheck, but it turns out to be good enough in practice to discover real -programmer errors that the compiler is not able to find through static -analysis. - -Enabling kmemcheck on a kernel will probably slow it down to the extent that -the machine will not be usable for normal workloads such as e.g. an -interactive desktop. kmemcheck will also cause the kernel to use about twice -as much memory as normal. For this reason, kmemcheck is strictly a debugging -feature. - - -Downloading ------------ - -As of version 2.6.31-rc1, kmemcheck is included in the mainline kernel. - - -Configuring and compiling -------------------------- - -kmemcheck only works for the x86 (both 32- and 64-bit) platform. A number of -configuration variables must have specific settings in order for the kmemcheck -menu to even appear in "menuconfig". These are: - -- ``CONFIG_CC_OPTIMIZE_FOR_SIZE=n`` - This option is located under "General setup" / "Optimize for size". - - Without this, gcc will use certain optimizations that usually lead to - false positive warnings from kmemcheck. An example of this is a 16-bit - field in a struct, where gcc may load 32 bits, then discard the upper - 16 bits. kmemcheck sees only the 32-bit load, and may trigger a - warning for the upper 16 bits (if they're uninitialized). - -- ``CONFIG_SLAB=y`` or ``CONFIG_SLUB=y`` - This option is located under "General setup" / "Choose SLAB - allocator". - -- ``CONFIG_FUNCTION_TRACER=n`` - This option is located under "Kernel hacking" / "Tracers" / "Kernel - Function Tracer" - - When function tracing is compiled in, gcc emits a call to another - function at the beginning of every function. This means that when the - page fault handler is called, the ftrace framework will be called - before kmemcheck has had a chance to handle the fault. If ftrace then - modifies memory that was tracked by kmemcheck, the result is an - endless recursive page fault. - -- ``CONFIG_DEBUG_PAGEALLOC=n`` - This option is located under "Kernel hacking" / "Memory Debugging" - / "Debug page memory allocations". - -In addition, I highly recommend turning on ``CONFIG_DEBUG_INFO=y``. This is also -located under "Kernel hacking". With this, you will be able to get line number -information from the kmemcheck warnings, which is extremely valuable in -debugging a problem. This option is not mandatory, however, because it slows -down the compilation process and produces a much bigger kernel image. - -Now the kmemcheck menu should be visible (under "Kernel hacking" / "Memory -Debugging" / "kmemcheck: trap use of uninitialized memory"). Here follows -a description of the kmemcheck configuration variables: - -- ``CONFIG_KMEMCHECK`` - This must be enabled in order to use kmemcheck at all... - -- ``CONFIG_KMEMCHECK_``[``DISABLED`` | ``ENABLED`` | ``ONESHOT``]``_BY_DEFAULT`` - This option controls the status of kmemcheck at boot-time. "Enabled" - will enable kmemcheck right from the start, "disabled" will boot the - kernel as normal (but with the kmemcheck code compiled in, so it can - be enabled at run-time after the kernel has booted), and "one-shot" is - a special mode which will turn kmemcheck off automatically after - detecting the first use of uninitialized memory. - - If you are using kmemcheck to actively debug a problem, then you - probably want to choose "enabled" here. - - The one-shot mode is mostly useful in automated test setups because it - can prevent floods of warnings and increase the chances of the machine - surviving in case something is really wrong. In other cases, the one- - shot mode could actually be counter-productive because it would turn - itself off at the very first error -- in the case of a false positive - too -- and this would come in the way of debugging the specific - problem you were interested in. - - If you would like to use your kernel as normal, but with a chance to - enable kmemcheck in case of some problem, it might be a good idea to - choose "disabled" here. When kmemcheck is disabled, most of the run- - time overhead is not incurred, and the kernel will be almost as fast - as normal. - -- ``CONFIG_KMEMCHECK_QUEUE_SIZE`` - Select the maximum number of error reports to store in an internal - (fixed-size) buffer. Since errors can occur virtually anywhere and in - any context, we need a temporary storage area which is guaranteed not - to generate any other page faults when accessed. The queue will be - emptied as soon as a tasklet may be scheduled. If the queue is full, - new error reports will be lost. - - The default value of 64 is probably fine. If some code produces more - than 64 errors within an irqs-off section, then the code is likely to - produce many, many more, too, and these additional reports seldom give - any more information (the first report is usually the most valuable - anyway). - - This number might have to be adjusted if you are not using serial - console or similar to capture the kernel log. If you are using the - "dmesg" command to save the log, then getting a lot of kmemcheck - warnings might overflow the kernel log itself, and the earlier reports - will get lost in that way instead. Try setting this to 10 or so on - such a setup. - -- ``CONFIG_KMEMCHECK_SHADOW_COPY_SHIFT`` - Select the number of shadow bytes to save along with each entry of the - error-report queue. These bytes indicate what parts of an allocation - are initialized, uninitialized, etc. and will be displayed when an - error is detected to help the debugging of a particular problem. - - The number entered here is actually the logarithm of the number of - bytes that will be saved. So if you pick for example 5 here, kmemcheck - will save 2^5 = 32 bytes. - - The default value should be fine for debugging most problems. It also - fits nicely within 80 columns. - -- ``CONFIG_KMEMCHECK_PARTIAL_OK`` - This option (when enabled) works around certain GCC optimizations that - produce 32-bit reads from 16-bit variables where the upper 16 bits are - thrown away afterwards. - - The default value (enabled) is recommended. This may of course hide - some real errors, but disabling it would probably produce a lot of - false positives. - -- ``CONFIG_KMEMCHECK_BITOPS_OK`` - This option silences warnings that would be generated for bit-field - accesses where not all the bits are initialized at the same time. This - may also hide some real bugs. - - This option is probably obsolete, or it should be replaced with - the kmemcheck-/bitfield-annotations for the code in question. The - default value is therefore fine. - -Now compile the kernel as usual. - - -How to use ----------- - -Booting -~~~~~~~ - -First some information about the command-line options. There is only one -option specific to kmemcheck, and this is called "kmemcheck". It can be used -to override the default mode as chosen by the ``CONFIG_KMEMCHECK_*_BY_DEFAULT`` -option. Its possible settings are: - -- ``kmemcheck=0`` (disabled) -- ``kmemcheck=1`` (enabled) -- ``kmemcheck=2`` (one-shot mode) - -If SLUB debugging has been enabled in the kernel, it may take precedence over -kmemcheck in such a way that the slab caches which are under SLUB debugging -will not be tracked by kmemcheck. In order to ensure that this doesn't happen -(even though it shouldn't by default), use SLUB's boot option ``slub_debug``, -like this: ``slub_debug=-`` - -In fact, this option may also be used for fine-grained control over SLUB vs. -kmemcheck. For example, if the command line includes -``kmemcheck=1 slub_debug=,dentry``, then SLUB debugging will be used only -for the "dentry" slab cache, and with kmemcheck tracking all the other -caches. This is advanced usage, however, and is not generally recommended. - - -Run-time enable/disable -~~~~~~~~~~~~~~~~~~~~~~~ - -When the kernel has booted, it is possible to enable or disable kmemcheck at -run-time. WARNING: This feature is still experimental and may cause false -positive warnings to appear. Therefore, try not to use this. If you find that -it doesn't work properly (e.g. you see an unreasonable amount of warnings), I -will be happy to take bug reports. - -Use the file ``/proc/sys/kernel/kmemcheck`` for this purpose, e.g.:: - - $ echo 0 > /proc/sys/kernel/kmemcheck # disables kmemcheck - -The numbers are the same as for the ``kmemcheck=`` command-line option. - - -Debugging -~~~~~~~~~ - -A typical report will look something like this:: - - WARNING: kmemcheck: Caught 32-bit read from uninitialized memory (ffff88003e4a2024) - 80000000000000000000000000000000000000000088ffff0000000000000000 - i i i i u u u u i i i i i i i i u u u u u u u u u u u u u u u u - ^ - - Pid: 1856, comm: ntpdate Not tainted 2.6.29-rc5 #264 945P-A - RIP: 0010:[<ffffffff8104ede8>] [<ffffffff8104ede8>] __dequeue_signal+0xc8/0x190 - RSP: 0018:ffff88003cdf7d98 EFLAGS: 00210002 - RAX: 0000000000000030 RBX: ffff88003d4ea968 RCX: 0000000000000009 - RDX: ffff88003e5d6018 RSI: ffff88003e5d6024 RDI: ffff88003cdf7e84 - RBP: ffff88003cdf7db8 R08: ffff88003e5d6000 R09: 0000000000000000 - R10: 0000000000000080 R11: 0000000000000000 R12: 000000000000000e - R13: ffff88003cdf7e78 R14: ffff88003d530710 R15: ffff88003d5a98c8 - FS: 0000000000000000(0000) GS:ffff880001982000(0063) knlGS:00000 - CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 - CR2: ffff88003f806ea0 CR3: 000000003c036000 CR4: 00000000000006a0 - DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 - DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 - [<ffffffff8104f04e>] dequeue_signal+0x8e/0x170 - [<ffffffff81050bd8>] get_signal_to_deliver+0x98/0x390 - [<ffffffff8100b87d>] do_notify_resume+0xad/0x7d0 - [<ffffffff8100c7b5>] int_signal+0x12/0x17 - [<ffffffffffffffff>] 0xffffffffffffffff - -The single most valuable information in this report is the RIP (or EIP on 32- -bit) value. This will help us pinpoint exactly which instruction that caused -the warning. - -If your kernel was compiled with ``CONFIG_DEBUG_INFO=y``, then all we have to do -is give this address to the addr2line program, like this:: - - $ addr2line -e vmlinux -i ffffffff8104ede8 - arch/x86/include/asm/string_64.h:12 - include/asm-generic/siginfo.h:287 - kernel/signal.c:380 - kernel/signal.c:410 - -The "``-e vmlinux``" tells addr2line which file to look in. **IMPORTANT:** -This must be the vmlinux of the kernel that produced the warning in the -first place! If not, the line number information will almost certainly be -wrong. - -The "``-i``" tells addr2line to also print the line numbers of inlined -functions. In this case, the flag was very important, because otherwise, -it would only have printed the first line, which is just a call to -``memcpy()``, which could be called from a thousand places in the kernel, and -is therefore not very useful. These inlined functions would not show up in -the stack trace above, simply because the kernel doesn't load the extra -debugging information. This technique can of course be used with ordinary -kernel oopses as well. - -In this case, it's the caller of ``memcpy()`` that is interesting, and it can be -found in ``include/asm-generic/siginfo.h``, line 287:: - - 281 static inline void copy_siginfo(struct siginfo *to, struct siginfo *from) - 282 { - 283 if (from->si_code < 0) - 284 memcpy(to, from, sizeof(*to)); - 285 else - 286 /* _sigchld is currently the largest know union member */ - 287 memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld)); - 288 } - -Since this was a read (kmemcheck usually warns about reads only, though it can -warn about writes to unallocated or freed memory as well), it was probably the -"from" argument which contained some uninitialized bytes. Following the chain -of calls, we move upwards to see where "from" was allocated or initialized, -``kernel/signal.c``, line 380:: - - 359 static void collect_signal(int sig, struct sigpending *list, siginfo_t *info) - 360 { - ... - 367 list_for_each_entry(q, &list->list, list) { - 368 if (q->info.si_signo == sig) { - 369 if (first) - 370 goto still_pending; - 371 first = q; - ... - 377 if (first) { - 378 still_pending: - 379 list_del_init(&first->list); - 380 copy_siginfo(info, &first->info); - 381 __sigqueue_free(first); - ... - 392 } - 393 } - -Here, it is ``&first->info`` that is being passed on to ``copy_siginfo()``. The -variable ``first`` was found on a list -- passed in as the second argument to -``collect_signal()``. We continue our journey through the stack, to figure out -where the item on "list" was allocated or initialized. We move to line 410:: - - 395 static int __dequeue_signal(struct sigpending *pending, sigset_t *mask, - 396 siginfo_t *info) - 397 { - ... - 410 collect_signal(sig, pending, info); - ... - 414 } - -Now we need to follow the ``pending`` pointer, since that is being passed on to -``collect_signal()`` as ``list``. At this point, we've run out of lines from the -"addr2line" output. Not to worry, we just paste the next addresses from the -kmemcheck stack dump, i.e.:: - - [<ffffffff8104f04e>] dequeue_signal+0x8e/0x170 - [<ffffffff81050bd8>] get_signal_to_deliver+0x98/0x390 - [<ffffffff8100b87d>] do_notify_resume+0xad/0x7d0 - [<ffffffff8100c7b5>] int_signal+0x12/0x17 - - $ addr2line -e vmlinux -i ffffffff8104f04e ffffffff81050bd8 \ - ffffffff8100b87d ffffffff8100c7b5 - kernel/signal.c:446 - kernel/signal.c:1806 - arch/x86/kernel/signal.c:805 - arch/x86/kernel/signal.c:871 - arch/x86/kernel/entry_64.S:694 - -Remember that since these addresses were found on the stack and not as the -RIP value, they actually point to the _next_ instruction (they are return -addresses). This becomes obvious when we look at the code for line 446:: - - 422 int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info) - 423 { - ... - 431 signr = __dequeue_signal(&tsk->signal->shared_pending, - 432 mask, info); - 433 /* - 434 * itimer signal ? - 435 * - 436 * itimers are process shared and we restart periodic - 437 * itimers in the signal delivery path to prevent DoS - 438 * attacks in the high resolution timer case. This is - 439 * compliant with the old way of self restarting - 440 * itimers, as the SIGALRM is a legacy signal and only - 441 * queued once. Changing the restart behaviour to - 442 * restart the timer in the signal dequeue path is - 443 * reducing the timer noise on heavy loaded !highres - 444 * systems too. - 445 */ - 446 if (unlikely(signr == SIGALRM)) { - ... - 489 } - -So instead of looking at 446, we should be looking at 431, which is the line -that executes just before 446. Here we see that what we are looking for is -``&tsk->signal->shared_pending``. - -Our next task is now to figure out which function that puts items on this -``shared_pending`` list. A crude, but efficient tool, is ``git grep``:: - - $ git grep -n 'shared_pending' kernel/ - ... - kernel/signal.c:828: pending = group ? &t->signal->shared_pending : &t->pending; - kernel/signal.c:1339: pending = group ? &t->signal->shared_pending : &t->pending; - ... - -There were more results, but none of them were related to list operations, -and these were the only assignments. We inspect the line numbers more closely -and find that this is indeed where items are being added to the list:: - - 816 static int send_signal(int sig, struct siginfo *info, struct task_struct *t, - 817 int group) - 818 { - ... - 828 pending = group ? &t->signal->shared_pending : &t->pending; - ... - 851 q = __sigqueue_alloc(t, GFP_ATOMIC, (sig < SIGRTMIN && - 852 (is_si_special(info) || - 853 info->si_code >= 0))); - 854 if (q) { - 855 list_add_tail(&q->list, &pending->list); - ... - 890 } - -and:: - - 1309 int send_sigqueue(struct sigqueue *q, struct task_struct *t, int group) - 1310 { - .... - 1339 pending = group ? &t->signal->shared_pending : &t->pending; - 1340 list_add_tail(&q->list, &pending->list); - .... - 1347 } - -In the first case, the list element we are looking for, ``q``, is being -returned from the function ``__sigqueue_alloc()``, which looks like an -allocation function. Let's take a look at it:: - - 187 static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags, - 188 int override_rlimit) - 189 { - 190 struct sigqueue *q = NULL; - 191 struct user_struct *user; - 192 - 193 /* - 194 * We won't get problems with the target's UID changing under us - 195 * because changing it requires RCU be used, and if t != current, the - 196 * caller must be holding the RCU readlock (by way of a spinlock) and - 197 * we use RCU protection here - 198 */ - 199 user = get_uid(__task_cred(t)->user); - 200 atomic_inc(&user->sigpending); - 201 if (override_rlimit || - 202 atomic_read(&user->sigpending) <= - 203 t->signal->rlim[RLIMIT_SIGPENDING].rlim_cur) - 204 q = kmem_cache_alloc(sigqueue_cachep, flags); - 205 if (unlikely(q == NULL)) { - 206 atomic_dec(&user->sigpending); - 207 free_uid(user); - 208 } else { - 209 INIT_LIST_HEAD(&q->list); - 210 q->flags = 0; - 211 q->user = user; - 212 } - 213 - 214 return q; - 215 } - -We see that this function initializes ``q->list``, ``q->flags``, and -``q->user``. It seems that now is the time to look at the definition of -``struct sigqueue``, e.g.:: - - 14 struct sigqueue { - 15 struct list_head list; - 16 int flags; - 17 siginfo_t info; - 18 struct user_struct *user; - 19 }; - -And, you might remember, it was a ``memcpy()`` on ``&first->info`` that -caused the warning, so this makes perfect sense. It also seems reasonable -to assume that it is the caller of ``__sigqueue_alloc()`` that has the -responsibility of filling out (initializing) this member. - -But just which fields of the struct were uninitialized? Let's look at -kmemcheck's report again:: - - WARNING: kmemcheck: Caught 32-bit read from uninitialized memory (ffff88003e4a2024) - 80000000000000000000000000000000000000000088ffff0000000000000000 - i i i i u u u u i i i i i i i i u u u u u u u u u u u u u u u u - ^ - -These first two lines are the memory dump of the memory object itself, and -the shadow bytemap, respectively. The memory object itself is in this case -``&first->info``. Just beware that the start of this dump is NOT the start -of the object itself! The position of the caret (^) corresponds with the -address of the read (ffff88003e4a2024). - -The shadow bytemap dump legend is as follows: - -- i: initialized -- u: uninitialized -- a: unallocated (memory has been allocated by the slab layer, but has not - yet been handed off to anybody) -- f: freed (memory has been allocated by the slab layer, but has been freed - by the previous owner) - -In order to figure out where (relative to the start of the object) the -uninitialized memory was located, we have to look at the disassembly. For -that, we'll need the RIP address again:: - - RIP: 0010:[<ffffffff8104ede8>] [<ffffffff8104ede8>] __dequeue_signal+0xc8/0x190 - - $ objdump -d --no-show-raw-insn vmlinux | grep -C 8 ffffffff8104ede8: - ffffffff8104edc8: mov %r8,0x8(%r8) - ffffffff8104edcc: test %r10d,%r10d - ffffffff8104edcf: js ffffffff8104ee88 <__dequeue_signal+0x168> - ffffffff8104edd5: mov %rax,%rdx - ffffffff8104edd8: mov $0xc,%ecx - ffffffff8104eddd: mov %r13,%rdi - ffffffff8104ede0: mov $0x30,%eax - ffffffff8104ede5: mov %rdx,%rsi - ffffffff8104ede8: rep movsl %ds:(%rsi),%es:(%rdi) - ffffffff8104edea: test $0x2,%al - ffffffff8104edec: je ffffffff8104edf0 <__dequeue_signal+0xd0> - ffffffff8104edee: movsw %ds:(%rsi),%es:(%rdi) - ffffffff8104edf0: test $0x1,%al - ffffffff8104edf2: je ffffffff8104edf5 <__dequeue_signal+0xd5> - ffffffff8104edf4: movsb %ds:(%rsi),%es:(%rdi) - ffffffff8104edf5: mov %r8,%rdi - ffffffff8104edf8: callq ffffffff8104de60 <__sigqueue_free> - -As expected, it's the "``rep movsl``" instruction from the ``memcpy()`` -that causes the warning. We know about ``REP MOVSL`` that it uses the register -``RCX`` to count the number of remaining iterations. By taking a look at the -register dump again (from the kmemcheck report), we can figure out how many -bytes were left to copy:: - - RAX: 0000000000000030 RBX: ffff88003d4ea968 RCX: 0000000000000009 - -By looking at the disassembly, we also see that ``%ecx`` is being loaded -with the value ``$0xc`` just before (ffffffff8104edd8), so we are very -lucky. Keep in mind that this is the number of iterations, not bytes. And -since this is a "long" operation, we need to multiply by 4 to get the -number of bytes. So this means that the uninitialized value was encountered -at 4 * (0xc - 0x9) = 12 bytes from the start of the object. - -We can now try to figure out which field of the "``struct siginfo``" that -was not initialized. This is the beginning of the struct:: - - 40 typedef struct siginfo { - 41 int si_signo; - 42 int si_errno; - 43 int si_code; - 44 - 45 union { - .. - 92 } _sifields; - 93 } siginfo_t; - -On 64-bit, the int is 4 bytes long, so it must the union member that has -not been initialized. We can verify this using gdb:: - - $ gdb vmlinux - ... - (gdb) p &((struct siginfo *) 0)->_sifields - $1 = (union {...} *) 0x10 - -Actually, it seems that the union member is located at offset 0x10 -- which -means that gcc has inserted 4 bytes of padding between the members ``si_code`` -and ``_sifields``. We can now get a fuller picture of the memory dump:: - - _----------------------------=> si_code - / _--------------------=> (padding) - | / _------------=> _sifields(._kill._pid) - | | / _----=> _sifields(._kill._uid) - | | | / - -------|-------|-------|-------| - 80000000000000000000000000000000000000000088ffff0000000000000000 - i i i i u u u u i i i i i i i i u u u u u u u u u u u u u u u u - -This allows us to realize another important fact: ``si_code`` contains the -value 0x80. Remember that x86 is little endian, so the first 4 bytes -"80000000" are really the number 0x00000080. With a bit of research, we -find that this is actually the constant ``SI_KERNEL`` defined in -``include/asm-generic/siginfo.h``:: - - 144 #define SI_KERNEL 0x80 /* sent by the kernel from somewhere */ - -This macro is used in exactly one place in the x86 kernel: In ``send_signal()`` -in ``kernel/signal.c``:: - - 816 static int send_signal(int sig, struct siginfo *info, struct task_struct *t, - 817 int group) - 818 { - ... - 828 pending = group ? &t->signal->shared_pending : &t->pending; - ... - 851 q = __sigqueue_alloc(t, GFP_ATOMIC, (sig < SIGRTMIN && - 852 (is_si_special(info) || - 853 info->si_code >= 0))); - 854 if (q) { - 855 list_add_tail(&q->list, &pending->list); - 856 switch ((unsigned long) info) { - ... - 865 case (unsigned long) SEND_SIG_PRIV: - 866 q->info.si_signo = sig; - 867 q->info.si_errno = 0; - 868 q->info.si_code = SI_KERNEL; - 869 q->info.si_pid = 0; - 870 q->info.si_uid = 0; - 871 break; - ... - 890 } - -Not only does this match with the ``.si_code`` member, it also matches the place -we found earlier when looking for where siginfo_t objects are enqueued on the -``shared_pending`` list. - -So to sum up: It seems that it is the padding introduced by the compiler -between two struct fields that is uninitialized, and this gets reported when -we do a ``memcpy()`` on the struct. This means that we have identified a false -positive warning. - -Normally, kmemcheck will not report uninitialized accesses in ``memcpy()`` calls -when both the source and destination addresses are tracked. (Instead, we copy -the shadow bytemap as well). In this case, the destination address clearly -was not tracked. We can dig a little deeper into the stack trace from above:: - - arch/x86/kernel/signal.c:805 - arch/x86/kernel/signal.c:871 - arch/x86/kernel/entry_64.S:694 - -And we clearly see that the destination siginfo object is located on the -stack:: - - 782 static void do_signal(struct pt_regs *regs) - 783 { - 784 struct k_sigaction ka; - 785 siginfo_t info; - ... - 804 signr = get_signal_to_deliver(&info, &ka, regs, NULL); - ... - 854 } - -And this ``&info`` is what eventually gets passed to ``copy_siginfo()`` as the -destination argument. - -Now, even though we didn't find an actual error here, the example is still a -good one, because it shows how one would go about to find out what the report -was all about. - - -Annotating false positives -~~~~~~~~~~~~~~~~~~~~~~~~~~ - -There are a few different ways to make annotations in the source code that -will keep kmemcheck from checking and reporting certain allocations. Here -they are: - -- ``__GFP_NOTRACK_FALSE_POSITIVE`` - This flag can be passed to ``kmalloc()`` or ``kmem_cache_alloc()`` - (therefore also to other functions that end up calling one of - these) to indicate that the allocation should not be tracked - because it would lead to a false positive report. This is a "big - hammer" way of silencing kmemcheck; after all, even if the false - positive pertains to particular field in a struct, for example, we - will now lose the ability to find (real) errors in other parts of - the same struct. - - Example:: - - /* No warnings will ever trigger on accessing any part of x */ - x = kmalloc(sizeof *x, GFP_KERNEL | __GFP_NOTRACK_FALSE_POSITIVE); - -- ``kmemcheck_bitfield_begin(name)``/``kmemcheck_bitfield_end(name)`` and - ``kmemcheck_annotate_bitfield(ptr, name)`` - The first two of these three macros can be used inside struct - definitions to signal, respectively, the beginning and end of a - bitfield. Additionally, this will assign the bitfield a name, which - is given as an argument to the macros. - - Having used these markers, one can later use - kmemcheck_annotate_bitfield() at the point of allocation, to indicate - which parts of the allocation is part of a bitfield. - - Example:: - - struct foo { - int x; - - kmemcheck_bitfield_begin(flags); - int flag_a:1; - int flag_b:1; - kmemcheck_bitfield_end(flags); - - int y; - }; - - struct foo *x = kmalloc(sizeof *x); - - /* No warnings will trigger on accessing the bitfield of x */ - kmemcheck_annotate_bitfield(x, flags); - - Note that ``kmemcheck_annotate_bitfield()`` can be used even before the - return value of ``kmalloc()`` is checked -- in other words, passing NULL - as the first argument is legal (and will do nothing). - - -Reporting errors ----------------- - -As we have seen, kmemcheck will produce false positive reports. Therefore, it -is not very wise to blindly post kmemcheck warnings to mailing lists and -maintainers. Instead, I encourage maintainers and developers to find errors -in their own code. If you get a warning, you can try to work around it, try -to figure out if it's a real error or not, or simply ignore it. Most -developers know their own code and will quickly and efficiently determine the -root cause of a kmemcheck report. This is therefore also the most efficient -way to work with kmemcheck. - -That said, we (the kmemcheck maintainers) will always be on the lookout for -false positives that we can annotate and silence. So whatever you find, -please drop us a note privately! Kernel configs and steps to reproduce (if -available) are of course a great help too. - -Happy hacking! - - -Technical description ---------------------- - -kmemcheck works by marking memory pages non-present. This means that whenever -somebody attempts to access the page, a page fault is generated. The page -fault handler notices that the page was in fact only hidden, and so it calls -on the kmemcheck code to make further investigations. - -When the investigations are completed, kmemcheck "shows" the page by marking -it present (as it would be under normal circumstances). This way, the -interrupted code can continue as usual. - -But after the instruction has been executed, we should hide the page again, so -that we can catch the next access too! Now kmemcheck makes use of a debugging -feature of the processor, namely single-stepping. When the processor has -finished the one instruction that generated the memory access, a debug -exception is raised. From here, we simply hide the page again and continue -execution, this time with the single-stepping feature turned off. - -kmemcheck requires some assistance from the memory allocator in order to work. -The memory allocator needs to - - 1. Tell kmemcheck about newly allocated pages and pages that are about to - be freed. This allows kmemcheck to set up and tear down the shadow memory - for the pages in question. The shadow memory stores the status of each - byte in the allocation proper, e.g. whether it is initialized or - uninitialized. - - 2. Tell kmemcheck which parts of memory should be marked uninitialized. - There are actually a few more states, such as "not yet allocated" and - "recently freed". - -If a slab cache is set up using the SLAB_NOTRACK flag, it will never return -memory that can take page faults because of kmemcheck. - -If a slab cache is NOT set up using the SLAB_NOTRACK flag, callers can still -request memory with the __GFP_NOTRACK or __GFP_NOTRACK_FALSE_POSITIVE flags. -This does not prevent the page faults from occurring, however, but marks the -object in question as being initialized so that no warnings will ever be -produced for this object. - -Currently, the SLAB and SLUB allocators are supported by kmemcheck. --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7670,16 +7670,6 @@ F: include/linux/kdb.h F: include/linux/kgdb.h F: kernel/debug/

-KMEMCHECK -M: Vegard Nossum vegardno@ifi.uio.no -M: Pekka Enberg penberg@kernel.org -S: Maintained -F: Documentation/dev-tools/kmemcheck.rst -F: arch/x86/include/asm/kmemcheck.h -F: arch/x86/mm/kmemcheck/ -F: include/linux/kmemcheck.h -F: mm/kmemcheck.c - KMEMLEAK M: Catalin Marinas catalin.marinas@arm.com S: Maintained --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -111,7 +111,6 @@ config X86 select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_KASAN if X86_64 select HAVE_ARCH_KGDB - select HAVE_ARCH_KMEMCHECK select HAVE_ARCH_MMAP_RND_BITS if MMU select HAVE_ARCH_MMAP_RND_COMPAT_BITS if MMU && COMPAT select HAVE_ARCH_COMPAT_MMAP_BASES if MMU && COMPAT @@ -1443,7 +1442,7 @@ config ARCH_DMA_ADDR_T_64BIT

config X86_DIRECT_GBPAGES def_bool y - depends on X86_64 && !DEBUG_PAGEALLOC && !KMEMCHECK + depends on X86_64 && !DEBUG_PAGEALLOC ---help--- Certain kernel features effectively disable kernel linear 1 GB mappings (even if the CPU otherwise --- a/arch/x86/include/asm/kmemcheck.h +++ b/arch/x86/include/asm/kmemcheck.h @@ -1,43 +1 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#ifndef ASM_X86_KMEMCHECK_H -#define ASM_X86_KMEMCHECK_H - -#include <linux/types.h> -#include <asm/ptrace.h> - -#ifdef CONFIG_KMEMCHECK -bool kmemcheck_active(struct pt_regs *regs); - -void kmemcheck_show(struct pt_regs *regs); -void kmemcheck_hide(struct pt_regs *regs); - -bool kmemcheck_fault(struct pt_regs *regs, - unsigned long address, unsigned long error_code); -bool kmemcheck_trap(struct pt_regs *regs); -#else -static inline bool kmemcheck_active(struct pt_regs *regs) -{ - return false; -} - -static inline void kmemcheck_show(struct pt_regs *regs) -{ -} - -static inline void kmemcheck_hide(struct pt_regs *regs) -{ -} - -static inline bool kmemcheck_fault(struct pt_regs *regs, - unsigned long address, unsigned long error_code) -{ - return false; -} - -static inline bool kmemcheck_trap(struct pt_regs *regs) -{ - return false; -} -#endif /* CONFIG_KMEMCHECK */ - -#endif --- a/arch/x86/include/asm/string_32.h +++ b/arch/x86/include/asm/string_32.h @@ -179,8 +179,6 @@ static inline void *__memcpy3d(void *to, * No 3D Now! */

-#ifndef CONFIG_KMEMCHECK - #if (__GNUC__ >= 4) #define memcpy(t, f, n) __builtin_memcpy(t, f, n) #else @@ -189,13 +187,6 @@ static inline void *__memcpy3d(void *to, ? __constant_memcpy((t), (f), (n)) \ : __memcpy((t), (f), (n))) #endif -#else -/* - * kmemcheck becomes very happy if we use the REP instructions unconditionally, - * because it means that we know both memory operands in advance. - */ -#define memcpy(t, f, n) __memcpy((t), (f), (n)) -#endif

#endif #endif /* !CONFIG_FORTIFY_SOURCE */ --- a/arch/x86/include/asm/string_64.h +++ b/arch/x86/include/asm/string_64.h @@ -33,7 +33,6 @@ extern void *memcpy(void *to, const void extern void *__memcpy(void *to, const void *from, size_t len);

#ifndef CONFIG_FORTIFY_SOURCE -#ifndef CONFIG_KMEMCHECK #if (__GNUC__ == 4 && __GNUC_MINOR__ < 3) || __GNUC__ < 4 #define memcpy(dst, src, len) \ ({ \ @@ -46,13 +45,6 @@ extern void *__memcpy(void *to, const vo __ret; \ }) #endif -#else -/* - * kmemcheck becomes very happy if we use the REP instructions unconditionally, - * because it means that we know both memory operands in advance. - */ -#define memcpy(dst, src, len) __inline_memcpy((dst), (src), (len)) -#endif #endif /* !CONFIG_FORTIFY_SOURCE */

#define __HAVE_ARCH_MEMSET --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -250,21 +250,6 @@ static void early_init_intel(struct cpui if (c->x86 == 6 && c->x86_model < 15) clear_cpu_cap(c, X86_FEATURE_PAT);

-#ifdef CONFIG_KMEMCHECK - /* - * P4s have a "fast strings" feature which causes single- - * stepping REP instructions to only generate a #DB on - * cache-line boundaries. - * - * Ingo Molnar reported a Pentium D (model 6) and a Xeon - * (model 2) with the same problem. - */ - if (c->x86 == 15) - if (msr_clear_bit(MSR_IA32_MISC_ENABLE, - MSR_IA32_MISC_ENABLE_FAST_STRING_BIT) > 0) - pr_info("kmemcheck: Disabling fast string operations\n"); -#endif - /* * If fast string is not enabled in IA32_MISC_ENABLE for any reason, * clear the fast string and enhanced fast string CPU capabilities. --- a/arch/x86/mm/Makefile +++ b/arch/x86/mm/Makefile @@ -29,8 +29,6 @@ obj-$(CONFIG_X86_PTDUMP) += debug_pageta

obj-$(CONFIG_HIGHMEM) += highmem_32.o

-obj-$(CONFIG_KMEMCHECK) += kmemcheck/ - KASAN_SANITIZE_kasan_init_$(BITS).o := n obj-$(CONFIG_KASAN) += kasan_init_$(BITS).o

--- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -170,12 +170,11 @@ static void enable_global_pages(void) static void __init probe_page_size_mask(void) { /* - * For CONFIG_KMEMCHECK or pagealloc debugging, identity mapping will - * use small pages. + * For pagealloc debugging, identity mapping will use small pages. * This will simplify cpa(), which otherwise needs to support splitting * large pages into small in interrupt context, etc. */ - if (boot_cpu_has(X86_FEATURE_PSE) && !debug_pagealloc_enabled() && !IS_ENABLED(CONFIG_KMEMCHECK)) + if (boot_cpu_has(X86_FEATURE_PSE) && !debug_pagealloc_enabled()) page_size_mask |= 1 << PG_LEVEL_2M; else direct_gbpages = 0; --- a/arch/x86/mm/kmemcheck/Makefile +++ /dev/null @@ -1 +0,0 @@ -obj-y := error.o kmemcheck.o opcode.o pte.o selftest.o shadow.o --- a/arch/x86/mm/kmemcheck/error.c +++ b/arch/x86/mm/kmemcheck/error.c @@ -1,228 +1 @@ // SPDX-License-Identifier: GPL-2.0 -#include <linux/interrupt.h> -#include <linux/kdebug.h> -#include <linux/kmemcheck.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/ptrace.h> -#include <linux/stacktrace.h> -#include <linux/string.h> - -#include "error.h" -#include "shadow.h" - -enum kmemcheck_error_type { - KMEMCHECK_ERROR_INVALID_ACCESS, - KMEMCHECK_ERROR_BUG, -}; - -#define SHADOW_COPY_SIZE (1 << CONFIG_KMEMCHECK_SHADOW_COPY_SHIFT) - -struct kmemcheck_error { - enum kmemcheck_error_type type; - - union { - /* KMEMCHECK_ERROR_INVALID_ACCESS */ - struct { - /* Kind of access that caused the error */ - enum kmemcheck_shadow state; - /* Address and size of the erroneous read */ - unsigned long address; - unsigned int size; - }; - }; - - struct pt_regs regs; - struct stack_trace trace; - unsigned long trace_entries[32]; - - /* We compress it to a char. */ - unsigned char shadow_copy[SHADOW_COPY_SIZE]; - unsigned char memory_copy[SHADOW_COPY_SIZE]; -}; - -/* - * Create a ring queue of errors to output. We can't call printk() directly - * from the kmemcheck traps, since this may call the console drivers and - * result in a recursive fault. - */ -static struct kmemcheck_error error_fifo[CONFIG_KMEMCHECK_QUEUE_SIZE]; -static unsigned int error_count; -static unsigned int error_rd; -static unsigned int error_wr; -static unsigned int error_missed_count; - -static struct kmemcheck_error *error_next_wr(void) -{ - struct kmemcheck_error *e; - - if (error_count == ARRAY_SIZE(error_fifo)) { - ++error_missed_count; - return NULL; - } - - e = &error_fifo[error_wr]; - if (++error_wr == ARRAY_SIZE(error_fifo)) - error_wr = 0; - ++error_count; - return e; -} - -static struct kmemcheck_error *error_next_rd(void) -{ - struct kmemcheck_error *e; - - if (error_count == 0) - return NULL; - - e = &error_fifo[error_rd]; - if (++error_rd == ARRAY_SIZE(error_fifo)) - error_rd = 0; - --error_count; - return e; -} - -void kmemcheck_error_recall(void) -{ - static const char *desc[] = { - [KMEMCHECK_SHADOW_UNALLOCATED] = "unallocated", - [KMEMCHECK_SHADOW_UNINITIALIZED] = "uninitialized", - [KMEMCHECK_SHADOW_INITIALIZED] = "initialized", - [KMEMCHECK_SHADOW_FREED] = "freed", - }; - - static const char short_desc[] = { - [KMEMCHECK_SHADOW_UNALLOCATED] = 'a', - [KMEMCHECK_SHADOW_UNINITIALIZED] = 'u', - [KMEMCHECK_SHADOW_INITIALIZED] = 'i', - [KMEMCHECK_SHADOW_FREED] = 'f', - }; - - struct kmemcheck_error *e; - unsigned int i; - - e = error_next_rd(); - if (!e) - return; - - switch (e->type) { - case KMEMCHECK_ERROR_INVALID_ACCESS: - printk(KERN_WARNING "WARNING: kmemcheck: Caught %d-bit read from %s memory (%p)\n", - 8 * e->size, e->state < ARRAY_SIZE(desc) ? - desc[e->state] : "(invalid shadow state)", - (void *) e->address); - - printk(KERN_WARNING); - for (i = 0; i < SHADOW_COPY_SIZE; ++i) - printk(KERN_CONT "%02x", e->memory_copy[i]); - printk(KERN_CONT "\n"); - - printk(KERN_WARNING); - for (i = 0; i < SHADOW_COPY_SIZE; ++i) { - if (e->shadow_copy[i] < ARRAY_SIZE(short_desc)) - printk(KERN_CONT " %c", short_desc[e->shadow_copy[i]]); - else - printk(KERN_CONT " ?"); - } - printk(KERN_CONT "\n"); - printk(KERN_WARNING "%*c\n", 2 + 2 - * (int) (e->address & (SHADOW_COPY_SIZE - 1)), '^'); - break; - case KMEMCHECK_ERROR_BUG: - printk(KERN_EMERG "ERROR: kmemcheck: Fatal error\n"); - break; - } - - __show_regs(&e->regs, 1); - print_stack_trace(&e->trace, 0); -} - -static void do_wakeup(unsigned long data) -{ - while (error_count > 0) - kmemcheck_error_recall(); - - if (error_missed_count > 0) { - printk(KERN_WARNING "kmemcheck: Lost %d error reports because " - "the queue was too small\n", error_missed_count); - error_missed_count = 0; - } -} - -static DECLARE_TASKLET(kmemcheck_tasklet, &do_wakeup, 0); - -/* - * Save the context of an error report. - */ -void kmemcheck_error_save(enum kmemcheck_shadow state, - unsigned long address, unsigned int size, struct pt_regs *regs) -{ - static unsigned long prev_ip; - - struct kmemcheck_error *e; - void *shadow_copy; - void *memory_copy; - - /* Don't report several adjacent errors from the same EIP. */ - if (regs->ip == prev_ip) - return; - prev_ip = regs->ip; - - e = error_next_wr(); - if (!e) - return; - - e->type = KMEMCHECK_ERROR_INVALID_ACCESS; - - e->state = state; - e->address = address; - e->size = size; - - /* Save regs */ - memcpy(&e->regs, regs, sizeof(*regs)); - - /* Save stack trace */ - e->trace.nr_entries = 0; - e->trace.entries = e->trace_entries; - e->trace.max_entries = ARRAY_SIZE(e->trace_entries); - e->trace.skip = 0; - save_stack_trace_regs(regs, &e->trace); - - /* Round address down to nearest 16 bytes */ - shadow_copy = kmemcheck_shadow_lookup(address - & ~(SHADOW_COPY_SIZE - 1)); - BUG_ON(!shadow_copy); - - memcpy(e->shadow_copy, shadow_copy, SHADOW_COPY_SIZE); - - kmemcheck_show_addr(address); - memory_copy = (void *) (address & ~(SHADOW_COPY_SIZE - 1)); - memcpy(e->memory_copy, memory_copy, SHADOW_COPY_SIZE); - kmemcheck_hide_addr(address); - - tasklet_hi_schedule_first(&kmemcheck_tasklet); -} - -/* - * Save the context of a kmemcheck bug. - */ -void kmemcheck_error_save_bug(struct pt_regs *regs) -{ - struct kmemcheck_error *e; - - e = error_next_wr(); - if (!e) - return; - - e->type = KMEMCHECK_ERROR_BUG; - - memcpy(&e->regs, regs, sizeof(*regs)); - - e->trace.nr_entries = 0; - e->trace.entries = e->trace_entries; - e->trace.max_entries = ARRAY_SIZE(e->trace_entries); - e->trace.skip = 1; - save_stack_trace(&e->trace); - - tasklet_hi_schedule_first(&kmemcheck_tasklet); -} --- a/arch/x86/mm/kmemcheck/error.h +++ b/arch/x86/mm/kmemcheck/error.h @@ -1,16 +1 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#ifndef ARCH__X86__MM__KMEMCHECK__ERROR_H -#define ARCH__X86__MM__KMEMCHECK__ERROR_H - -#include <linux/ptrace.h> - -#include "shadow.h" - -void kmemcheck_error_save(enum kmemcheck_shadow state, - unsigned long address, unsigned int size, struct pt_regs *regs); - -void kmemcheck_error_save_bug(struct pt_regs *regs); - -void kmemcheck_error_recall(void); - -#endif --- a/arch/x86/mm/kmemcheck/kmemcheck.c +++ /dev/null @@ -1,658 +0,0 @@ -/** - * kmemcheck - a heavyweight memory checker for the linux kernel - * Copyright (C) 2007, 2008 Vegard Nossum vegardno@ifi.uio.no - * (With a lot of help from Ingo Molnar and Pekka Enberg.) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License (version 2) as - * published by the Free Software Foundation. - */ - -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/kallsyms.h> -#include <linux/kernel.h> -#include <linux/kmemcheck.h> -#include <linux/mm.h> -#include <linux/page-flags.h> -#include <linux/percpu.h> -#include <linux/ptrace.h> -#include <linux/string.h> -#include <linux/types.h> - -#include <asm/cacheflush.h> -#include <asm/kmemcheck.h> -#include <asm/pgtable.h> -#include <asm/tlbflush.h> - -#include "error.h" -#include "opcode.h" -#include "pte.h" -#include "selftest.h" -#include "shadow.h" - - -#ifdef CONFIG_KMEMCHECK_DISABLED_BY_DEFAULT -# define KMEMCHECK_ENABLED 0 -#endif - -#ifdef CONFIG_KMEMCHECK_ENABLED_BY_DEFAULT -# define KMEMCHECK_ENABLED 1 -#endif - -#ifdef CONFIG_KMEMCHECK_ONESHOT_BY_DEFAULT -# define KMEMCHECK_ENABLED 2 -#endif - -int kmemcheck_enabled = KMEMCHECK_ENABLED; - -int __init kmemcheck_init(void) -{ -#ifdef CONFIG_SMP - /* - * Limit SMP to use a single CPU. We rely on the fact that this code - * runs before SMP is set up. - */ - if (setup_max_cpus > 1) { - printk(KERN_INFO - "kmemcheck: Limiting number of CPUs to 1.\n"); - setup_max_cpus = 1; - } -#endif - - if (!kmemcheck_selftest()) { - printk(KERN_INFO "kmemcheck: self-tests failed; disabling\n"); - kmemcheck_enabled = 0; - return -EINVAL; - } - - printk(KERN_INFO "kmemcheck: Initialized\n"); - return 0; -} - -early_initcall(kmemcheck_init); - -/* - * We need to parse the kmemcheck= option before any memory is allocated. - */ -static int __init param_kmemcheck(char *str) -{ - int val; - int ret; - - if (!str) - return -EINVAL; - - ret = kstrtoint(str, 0, &val); - if (ret) - return ret; - kmemcheck_enabled = val; - return 0; -} - -early_param("kmemcheck", param_kmemcheck); - -int kmemcheck_show_addr(unsigned long address) -{ - pte_t *pte; - - pte = kmemcheck_pte_lookup(address); - if (!pte) - return 0; - - set_pte(pte, __pte(pte_val(*pte) | _PAGE_PRESENT)); - __flush_tlb_one(address); - return 1; -} - -int kmemcheck_hide_addr(unsigned long address) -{ - pte_t *pte; - - pte = kmemcheck_pte_lookup(address); - if (!pte) - return 0; - - set_pte(pte, __pte(pte_val(*pte) & ~_PAGE_PRESENT)); - __flush_tlb_one(address); - return 1; -} - -struct kmemcheck_context { - bool busy; - int balance; - - /* - * There can be at most two memory operands to an instruction, but - * each address can cross a page boundary -- so we may need up to - * four addresses that must be hidden/revealed for each fault. - */ - unsigned long addr[4]; - unsigned long n_addrs; - unsigned long flags; - - /* Data size of the instruction that caused a fault. */ - unsigned int size; -}; - -static DEFINE_PER_CPU(struct kmemcheck_context, kmemcheck_context); - -bool kmemcheck_active(struct pt_regs *regs) -{ - struct kmemcheck_context *data = this_cpu_ptr(&kmemcheck_context); - - return data->balance > 0; -} - -/* Save an address that needs to be shown/hidden */ -static void kmemcheck_save_addr(unsigned long addr) -{ - struct kmemcheck_context *data = this_cpu_ptr(&kmemcheck_context); - - BUG_ON(data->n_addrs >= ARRAY_SIZE(data->addr)); - data->addr[data->n_addrs++] = addr; -} - -static unsigned int kmemcheck_show_all(void) -{ - struct kmemcheck_context *data = this_cpu_ptr(&kmemcheck_context); - unsigned int i; - unsigned int n; - - n = 0; - for (i = 0; i < data->n_addrs; ++i) - n += kmemcheck_show_addr(data->addr[i]); - - return n; -} - -static unsigned int kmemcheck_hide_all(void) -{ - struct kmemcheck_context *data = this_cpu_ptr(&kmemcheck_context); - unsigned int i; - unsigned int n; - - n = 0; - for (i = 0; i < data->n_addrs; ++i) - n += kmemcheck_hide_addr(data->addr[i]); - - return n; -} - -/* - * Called from the #PF handler. - */ -void kmemcheck_show(struct pt_regs *regs) -{ - struct kmemcheck_context *data = this_cpu_ptr(&kmemcheck_context); - - BUG_ON(!irqs_disabled()); - - if (unlikely(data->balance != 0)) { - kmemcheck_show_all(); - kmemcheck_error_save_bug(regs); - data->balance = 0; - return; - } - - /* - * None of the addresses actually belonged to kmemcheck. Note that - * this is not an error. - */ - if (kmemcheck_show_all() == 0) - return; - - ++data->balance; - - /* - * The IF needs to be cleared as well, so that the faulting - * instruction can run "uninterrupted". Otherwise, we might take - * an interrupt and start executing that before we've had a chance - * to hide the page again. - * - * NOTE: In the rare case of multiple faults, we must not override - * the original flags: - */ - if (!(regs->flags & X86_EFLAGS_TF)) - data->flags = regs->flags; - - regs->flags |= X86_EFLAGS_TF; - regs->flags &= ~X86_EFLAGS_IF; -} - -/* - * Called from the #DB handler. - */ -void kmemcheck_hide(struct pt_regs *regs) -{ - struct kmemcheck_context *data = this_cpu_ptr(&kmemcheck_context); - int n; - - BUG_ON(!irqs_disabled()); - - if (unlikely(data->balance != 1)) { - kmemcheck_show_all(); - kmemcheck_error_save_bug(regs); - data->n_addrs = 0; - data->balance = 0; - - if (!(data->flags & X86_EFLAGS_TF)) - regs->flags &= ~X86_EFLAGS_TF; - if (data->flags & X86_EFLAGS_IF) - regs->flags |= X86_EFLAGS_IF; - return; - } - - if (kmemcheck_enabled) - n = kmemcheck_hide_all(); - else - n = kmemcheck_show_all(); - - if (n == 0) - return; - - --data->balance; - - data->n_addrs = 0; - - if (!(data->flags & X86_EFLAGS_TF)) - regs->flags &= ~X86_EFLAGS_TF; - if (data->flags & X86_EFLAGS_IF) - regs->flags |= X86_EFLAGS_IF; -} - -void kmemcheck_show_pages(struct page *p, unsigned int n) -{ - unsigned int i; - - for (i = 0; i < n; ++i) { - unsigned long address; - pte_t *pte; - unsigned int level; - - address = (unsigned long) page_address(&p[i]); - pte = lookup_address(address, &level); - BUG_ON(!pte); - BUG_ON(level != PG_LEVEL_4K); - - set_pte(pte, __pte(pte_val(*pte) | _PAGE_PRESENT)); - set_pte(pte, __pte(pte_val(*pte) & ~_PAGE_HIDDEN)); - __flush_tlb_one(address); - } -} - -bool kmemcheck_page_is_tracked(struct page *p) -{ - /* This will also check the "hidden" flag of the PTE. */ - return kmemcheck_pte_lookup((unsigned long) page_address(p)); -} - -void kmemcheck_hide_pages(struct page *p, unsigned int n) -{ - unsigned int i; - - for (i = 0; i < n; ++i) { - unsigned long address; - pte_t *pte; - unsigned int level; - - address = (unsigned long) page_address(&p[i]); - pte = lookup_address(address, &level); - BUG_ON(!pte); - BUG_ON(level != PG_LEVEL_4K); - - set_pte(pte, __pte(pte_val(*pte) & ~_PAGE_PRESENT)); - set_pte(pte, __pte(pte_val(*pte) | _PAGE_HIDDEN)); - __flush_tlb_one(address); - } -} - -/* Access may NOT cross page boundary */ -static void kmemcheck_read_strict(struct pt_regs *regs, - unsigned long addr, unsigned int size) -{ - void *shadow; - enum kmemcheck_shadow status; - - shadow = kmemcheck_shadow_lookup(addr); - if (!shadow) - return; - - kmemcheck_save_addr(addr); - status = kmemcheck_shadow_test(shadow, size); - if (status == KMEMCHECK_SHADOW_INITIALIZED) - return; - - if (kmemcheck_enabled) - kmemcheck_error_save(status, addr, size, regs); - - if (kmemcheck_enabled == 2) - kmemcheck_enabled = 0; - - /* Don't warn about it again. */ - kmemcheck_shadow_set(shadow, size); -} - -bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size) -{ - enum kmemcheck_shadow status; - void *shadow; - - shadow = kmemcheck_shadow_lookup(addr); - if (!shadow) - return true; - - status = kmemcheck_shadow_test_all(shadow, size); - - return status == KMEMCHECK_SHADOW_INITIALIZED; -} - -/* Access may cross page boundary */ -static void kmemcheck_read(struct pt_regs *regs, - unsigned long addr, unsigned int size) -{ - unsigned long page = addr & PAGE_MASK; - unsigned long next_addr = addr + size - 1; - unsigned long next_page = next_addr & PAGE_MASK; - - if (likely(page == next_page)) { - kmemcheck_read_strict(regs, addr, size); - return; - } - - /* - * What we do is basically to split the access across the - * two pages and handle each part separately. Yes, this means - * that we may now see reads that are 3 + 5 bytes, for - * example (and if both are uninitialized, there will be two - * reports), but it makes the code a lot simpler. - */ - kmemcheck_read_strict(regs, addr, next_page - addr); - kmemcheck_read_strict(regs, next_page, next_addr - next_page); -} - -static void kmemcheck_write_strict(struct pt_regs *regs, - unsigned long addr, unsigned int size) -{ - void *shadow; - - shadow = kmemcheck_shadow_lookup(addr); - if (!shadow) - return; - - kmemcheck_save_addr(addr); - kmemcheck_shadow_set(shadow, size); -} - -static void kmemcheck_write(struct pt_regs *regs, - unsigned long addr, unsigned int size) -{ - unsigned long page = addr & PAGE_MASK; - unsigned long next_addr = addr + size - 1; - unsigned long next_page = next_addr & PAGE_MASK; - - if (likely(page == next_page)) { - kmemcheck_write_strict(regs, addr, size); - return; - } - - /* See comment in kmemcheck_read(). */ - kmemcheck_write_strict(regs, addr, next_page - addr); - kmemcheck_write_strict(regs, next_page, next_addr - next_page); -} - -/* - * Copying is hard. We have two addresses, each of which may be split across - * a page (and each page will have different shadow addresses). - */ -static void kmemcheck_copy(struct pt_regs *regs, - unsigned long src_addr, unsigned long dst_addr, unsigned int size) -{ - uint8_t shadow[8]; - enum kmemcheck_shadow status; - - unsigned long page; - unsigned long next_addr; - unsigned long next_page; - - uint8_t *x; - unsigned int i; - unsigned int n; - - BUG_ON(size > sizeof(shadow)); - - page = src_addr & PAGE_MASK; - next_addr = src_addr + size - 1; - next_page = next_addr & PAGE_MASK; - - if (likely(page == next_page)) { - /* Same page */ - x = kmemcheck_shadow_lookup(src_addr); - if (x) { - kmemcheck_save_addr(src_addr); - for (i = 0; i < size; ++i) - shadow[i] = x[i]; - } else { - for (i = 0; i < size; ++i) - shadow[i] = KMEMCHECK_SHADOW_INITIALIZED; - } - } else { - n = next_page - src_addr; - BUG_ON(n > sizeof(shadow)); - - /* First page */ - x = kmemcheck_shadow_lookup(src_addr); - if (x) { - kmemcheck_save_addr(src_addr); - for (i = 0; i < n; ++i) - shadow[i] = x[i]; - } else { - /* Not tracked */ - for (i = 0; i < n; ++i) - shadow[i] = KMEMCHECK_SHADOW_INITIALIZED; - } - - /* Second page */ - x = kmemcheck_shadow_lookup(next_page); - if (x) { - kmemcheck_save_addr(next_page); - for (i = n; i < size; ++i) - shadow[i] = x[i - n]; - } else { - /* Not tracked */ - for (i = n; i < size; ++i) - shadow[i] = KMEMCHECK_SHADOW_INITIALIZED; - } - } - - page = dst_addr & PAGE_MASK; - next_addr = dst_addr + size - 1; - next_page = next_addr & PAGE_MASK; - - if (likely(page == next_page)) { - /* Same page */ - x = kmemcheck_shadow_lookup(dst_addr); - if (x) { - kmemcheck_save_addr(dst_addr); - for (i = 0; i < size; ++i) { - x[i] = shadow[i]; - shadow[i] = KMEMCHECK_SHADOW_INITIALIZED; - } - } - } else { - n = next_page - dst_addr; - BUG_ON(n > sizeof(shadow)); - - /* First page */ - x = kmemcheck_shadow_lookup(dst_addr); - if (x) { - kmemcheck_save_addr(dst_addr); - for (i = 0; i < n; ++i) { - x[i] = shadow[i]; - shadow[i] = KMEMCHECK_SHADOW_INITIALIZED; - } - } - - /* Second page */ - x = kmemcheck_shadow_lookup(next_page); - if (x) { - kmemcheck_save_addr(next_page); - for (i = n; i < size; ++i) { - x[i - n] = shadow[i]; - shadow[i] = KMEMCHECK_SHADOW_INITIALIZED; - } - } - } - - status = kmemcheck_shadow_test(shadow, size); - if (status == KMEMCHECK_SHADOW_INITIALIZED) - return; - - if (kmemcheck_enabled) - kmemcheck_error_save(status, src_addr, size, regs); - - if (kmemcheck_enabled == 2) - kmemcheck_enabled = 0; -} - -enum kmemcheck_method { - KMEMCHECK_READ, - KMEMCHECK_WRITE, -}; - -static void kmemcheck_access(struct pt_regs *regs, - unsigned long fallback_address, enum kmemcheck_method fallback_method) -{ - const uint8_t *insn; - const uint8_t *insn_primary; - unsigned int size; - - struct kmemcheck_context *data = this_cpu_ptr(&kmemcheck_context); - - /* Recursive fault -- ouch. */ - if (data->busy) { - kmemcheck_show_addr(fallback_address); - kmemcheck_error_save_bug(regs); - return; - } - - data->busy = true; - - insn = (const uint8_t *) regs->ip; - insn_primary = kmemcheck_opcode_get_primary(insn); - - kmemcheck_opcode_decode(insn, &size); - - switch (insn_primary[0]) { -#ifdef CONFIG_KMEMCHECK_BITOPS_OK - /* AND, OR, XOR */ - /* - * Unfortunately, these instructions have to be excluded from - * our regular checking since they access only some (and not - * all) bits. This clears out "bogus" bitfield-access warnings. - */ - case 0x80: - case 0x81: - case 0x82: - case 0x83: - switch ((insn_primary[1] >> 3) & 7) { - /* OR */ - case 1: - /* AND */ - case 4: - /* XOR */ - case 6: - kmemcheck_write(regs, fallback_address, size); - goto out; - - /* ADD */ - case 0: - /* ADC */ - case 2: - /* SBB */ - case 3: - /* SUB */ - case 5: - /* CMP */ - case 7: - break; - } - break; -#endif - - /* MOVS, MOVSB, MOVSW, MOVSD */ - case 0xa4: - case 0xa5: - /* - * These instructions are special because they take two - * addresses, but we only get one page fault. - */ - kmemcheck_copy(regs, regs->si, regs->di, size); - goto out; - - /* CMPS, CMPSB, CMPSW, CMPSD */ - case 0xa6: - case 0xa7: - kmemcheck_read(regs, regs->si, size); - kmemcheck_read(regs, regs->di, size); - goto out; - } - - /* - * If the opcode isn't special in any way, we use the data from the - * page fault handler to determine the address and type of memory - * access. - */ - switch (fallback_method) { - case KMEMCHECK_READ: - kmemcheck_read(regs, fallback_address, size); - goto out; - case KMEMCHECK_WRITE: - kmemcheck_write(regs, fallback_address, size); - goto out; - } - -out: - data->busy = false; -} - -bool kmemcheck_fault(struct pt_regs *regs, unsigned long address, - unsigned long error_code) -{ - pte_t *pte; - - /* - * XXX: Is it safe to assume that memory accesses from virtual 86 - * mode or non-kernel code segments will _never_ access kernel - * memory (e.g. tracked pages)? For now, we need this to avoid - * invoking kmemcheck for PnP BIOS calls. - */ - if (regs->flags & X86_VM_MASK) - return false; - if (regs->cs != __KERNEL_CS) - return false; - - pte = kmemcheck_pte_lookup(address); - if (!pte) - return false; - - WARN_ON_ONCE(in_nmi()); - - if (error_code & 2) - kmemcheck_access(regs, address, KMEMCHECK_WRITE); - else - kmemcheck_access(regs, address, KMEMCHECK_READ); - - kmemcheck_show(regs); - return true; -} - -bool kmemcheck_trap(struct pt_regs *regs) -{ - if (!kmemcheck_active(regs)) - return false; - - /* We're done. */ - kmemcheck_hide(regs); - return true; -} --- a/arch/x86/mm/kmemcheck/opcode.c +++ b/arch/x86/mm/kmemcheck/opcode.c @@ -1,107 +1 @@ // SPDX-License-Identifier: GPL-2.0 -#include <linux/types.h> - -#include "opcode.h" - -static bool opcode_is_prefix(uint8_t b) -{ - return - /* Group 1 */ - b == 0xf0 || b == 0xf2 || b == 0xf3 - /* Group 2 */ - || b == 0x2e || b == 0x36 || b == 0x3e || b == 0x26 - || b == 0x64 || b == 0x65 - /* Group 3 */ - || b == 0x66 - /* Group 4 */ - || b == 0x67; -} - -#ifdef CONFIG_X86_64 -static bool opcode_is_rex_prefix(uint8_t b) -{ - return (b & 0xf0) == 0x40; -} -#else -static bool opcode_is_rex_prefix(uint8_t b) -{ - return false; -} -#endif - -#define REX_W (1 << 3) - -/* - * This is a VERY crude opcode decoder. We only need to find the size of the - * load/store that caused our #PF and this should work for all the opcodes - * that we care about. Moreover, the ones who invented this instruction set - * should be shot. - */ -void kmemcheck_opcode_decode(const uint8_t *op, unsigned int *size) -{ - /* Default operand size */ - int operand_size_override = 4; - - /* prefixes */ - for (; opcode_is_prefix(*op); ++op) { - if (*op == 0x66) - operand_size_override = 2; - } - - /* REX prefix */ - if (opcode_is_rex_prefix(*op)) { - uint8_t rex = *op; - - ++op; - if (rex & REX_W) { - switch (*op) { - case 0x63: - *size = 4; - return; - case 0x0f: - ++op; - - switch (*op) { - case 0xb6: - case 0xbe: - *size = 1; - return; - case 0xb7: - case 0xbf: - *size = 2; - return; - } - - break; - } - - *size = 8; - return; - } - } - - /* escape opcode */ - if (*op == 0x0f) { - ++op; - - /* - * This is move with zero-extend and sign-extend, respectively; - * we don't have to think about 0xb6/0xbe, because this is - * already handled in the conditional below. - */ - if (*op == 0xb7 || *op == 0xbf) - operand_size_override = 2; - } - - *size = (*op & 1) ? operand_size_override : 1; -} - -const uint8_t *kmemcheck_opcode_get_primary(const uint8_t *op) -{ - /* skip prefixes */ - while (opcode_is_prefix(*op)) - ++op; - if (opcode_is_rex_prefix(*op)) - ++op; - return op; -} --- a/arch/x86/mm/kmemcheck/opcode.h +++ b/arch/x86/mm/kmemcheck/opcode.h @@ -1,10 +1 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#ifndef ARCH__X86__MM__KMEMCHECK__OPCODE_H -#define ARCH__X86__MM__KMEMCHECK__OPCODE_H - -#include <linux/types.h> - -void kmemcheck_opcode_decode(const uint8_t *op, unsigned int *size); -const uint8_t *kmemcheck_opcode_get_primary(const uint8_t *op); - -#endif --- a/arch/x86/mm/kmemcheck/pte.c +++ b/arch/x86/mm/kmemcheck/pte.c @@ -1,23 +1 @@ // SPDX-License-Identifier: GPL-2.0 -#include <linux/mm.h> - -#include <asm/pgtable.h> - -#include "pte.h" - -pte_t *kmemcheck_pte_lookup(unsigned long address) -{ - pte_t *pte; - unsigned int level; - - pte = lookup_address(address, &level); - if (!pte) - return NULL; - if (level != PG_LEVEL_4K) - return NULL; - if (!pte_hidden(*pte)) - return NULL; - - return pte; -} - --- a/arch/x86/mm/kmemcheck/pte.h +++ b/arch/x86/mm/kmemcheck/pte.h @@ -1,11 +1 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#ifndef ARCH__X86__MM__KMEMCHECK__PTE_H -#define ARCH__X86__MM__KMEMCHECK__PTE_H - -#include <linux/mm.h> - -#include <asm/pgtable.h> - -pte_t *kmemcheck_pte_lookup(unsigned long address); - -#endif --- a/arch/x86/mm/kmemcheck/selftest.c +++ b/arch/x86/mm/kmemcheck/selftest.c @@ -1,71 +1 @@ // SPDX-License-Identifier: GPL-2.0 -#include <linux/bug.h> -#include <linux/kernel.h> - -#include "opcode.h" -#include "selftest.h" - -struct selftest_opcode { - unsigned int expected_size; - const uint8_t *insn; - const char *desc; -}; - -static const struct selftest_opcode selftest_opcodes[] = { - /* REP MOVS */ - {1, "\xf3\xa4", "rep movsb <mem8>, <mem8>"}, - {4, "\xf3\xa5", "rep movsl <mem32>, <mem32>"}, - - /* MOVZX / MOVZXD */ - {1, "\x66\x0f\xb6\x51\xf8", "movzwq <mem8>, <reg16>"}, - {1, "\x0f\xb6\x51\xf8", "movzwq <mem8>, <reg32>"}, - - /* MOVSX / MOVSXD */ - {1, "\x66\x0f\xbe\x51\xf8", "movswq <mem8>, <reg16>"}, - {1, "\x0f\xbe\x51\xf8", "movswq <mem8>, <reg32>"}, - -#ifdef CONFIG_X86_64 - /* MOVZX / MOVZXD */ - {1, "\x49\x0f\xb6\x51\xf8", "movzbq <mem8>, <reg64>"}, - {2, "\x49\x0f\xb7\x51\xf8", "movzbq <mem16>, <reg64>"}, - - /* MOVSX / MOVSXD */ - {1, "\x49\x0f\xbe\x51\xf8", "movsbq <mem8>, <reg64>"}, - {2, "\x49\x0f\xbf\x51\xf8", "movsbq <mem16>, <reg64>"}, - {4, "\x49\x63\x51\xf8", "movslq <mem32>, <reg64>"}, -#endif -}; - -static bool selftest_opcode_one(const struct selftest_opcode *op) -{ - unsigned size; - - kmemcheck_opcode_decode(op->insn, &size); - - if (size == op->expected_size) - return true; - - printk(KERN_WARNING "kmemcheck: opcode %s: expected size %d, got %d\n", - op->desc, op->expected_size, size); - return false; -} - -static bool selftest_opcodes_all(void) -{ - bool pass = true; - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(selftest_opcodes); ++i) - pass = pass && selftest_opcode_one(&selftest_opcodes[i]); - - return pass; -} - -bool kmemcheck_selftest(void) -{ - bool pass = true; - - pass = pass && selftest_opcodes_all(); - - return pass; -} --- a/arch/x86/mm/kmemcheck/selftest.h +++ b/arch/x86/mm/kmemcheck/selftest.h @@ -1,7 +1 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#ifndef ARCH_X86_MM_KMEMCHECK_SELFTEST_H -#define ARCH_X86_MM_KMEMCHECK_SELFTEST_H - -bool kmemcheck_selftest(void); - -#endif --- a/arch/x86/mm/kmemcheck/shadow.c +++ /dev/null @@ -1,173 +0,0 @@ -#include <linux/kmemcheck.h> -#include <linux/export.h> -#include <linux/mm.h> - -#include <asm/page.h> -#include <asm/pgtable.h> - -#include "pte.h" -#include "shadow.h" - -/* - * Return the shadow address for the given address. Returns NULL if the - * address is not tracked. - * - * We need to be extremely careful not to follow any invalid pointers, - * because this function can be called for *any* possible address. - */ -void *kmemcheck_shadow_lookup(unsigned long address) -{ - pte_t *pte; - struct page *page; - - if (!virt_addr_valid(address)) - return NULL; - - pte = kmemcheck_pte_lookup(address); - if (!pte) - return NULL; - - page = virt_to_page(address); - if (!page->shadow) - return NULL; - return page->shadow + (address & (PAGE_SIZE - 1)); -} - -static void mark_shadow(void *address, unsigned int n, - enum kmemcheck_shadow status) -{ - unsigned long addr = (unsigned long) address; - unsigned long last_addr = addr + n - 1; - unsigned long page = addr & PAGE_MASK; - unsigned long last_page = last_addr & PAGE_MASK; - unsigned int first_n; - void *shadow; - - /* If the memory range crosses a page boundary, stop there. */ - if (page == last_page) - first_n = n; - else - first_n = page + PAGE_SIZE - addr; - - shadow = kmemcheck_shadow_lookup(addr); - if (shadow) - memset(shadow, status, first_n); - - addr += first_n; - n -= first_n; - - /* Do full-page memset()s. */ - while (n >= PAGE_SIZE) { - shadow = kmemcheck_shadow_lookup(addr); - if (shadow) - memset(shadow, status, PAGE_SIZE); - - addr += PAGE_SIZE; - n -= PAGE_SIZE; - } - - /* Do the remaining page, if any. */ - if (n > 0) { - shadow = kmemcheck_shadow_lookup(addr); - if (shadow) - memset(shadow, status, n); - } -} - -void kmemcheck_mark_unallocated(void *address, unsigned int n) -{ - mark_shadow(address, n, KMEMCHECK_SHADOW_UNALLOCATED); -} - -void kmemcheck_mark_uninitialized(void *address, unsigned int n) -{ - mark_shadow(address, n, KMEMCHECK_SHADOW_UNINITIALIZED); -} - -/* - * Fill the shadow memory of the given address such that the memory at that - * address is marked as being initialized. - */ -void kmemcheck_mark_initialized(void *address, unsigned int n) -{ - mark_shadow(address, n, KMEMCHECK_SHADOW_INITIALIZED); -} -EXPORT_SYMBOL_GPL(kmemcheck_mark_initialized); - -void kmemcheck_mark_freed(void *address, unsigned int n) -{ - mark_shadow(address, n, KMEMCHECK_SHADOW_FREED); -} - -void kmemcheck_mark_unallocated_pages(struct page *p, unsigned int n) -{ - unsigned int i; - - for (i = 0; i < n; ++i) - kmemcheck_mark_unallocated(page_address(&p[i]), PAGE_SIZE); -} - -void kmemcheck_mark_uninitialized_pages(struct page *p, unsigned int n) -{ - unsigned int i; - - for (i = 0; i < n; ++i) - kmemcheck_mark_uninitialized(page_address(&p[i]), PAGE_SIZE); -} - -void kmemcheck_mark_initialized_pages(struct page *p, unsigned int n) -{ - unsigned int i; - - for (i = 0; i < n; ++i) - kmemcheck_mark_initialized(page_address(&p[i]), PAGE_SIZE); -} - -enum kmemcheck_shadow kmemcheck_shadow_test(void *shadow, unsigned int size) -{ -#ifdef CONFIG_KMEMCHECK_PARTIAL_OK - uint8_t *x; - unsigned int i; - - x = shadow; - - /* - * Make sure _some_ bytes are initialized. Gcc frequently generates - * code to access neighboring bytes. - */ - for (i = 0; i < size; ++i) { - if (x[i] == KMEMCHECK_SHADOW_INITIALIZED) - return x[i]; - } - - return x[0]; -#else - return kmemcheck_shadow_test_all(shadow, size); -#endif -} - -enum kmemcheck_shadow kmemcheck_shadow_test_all(void *shadow, unsigned int size) -{ - uint8_t *x; - unsigned int i; - - x = shadow; - - /* All bytes must be initialized. */ - for (i = 0; i < size; ++i) { - if (x[i] != KMEMCHECK_SHADOW_INITIALIZED) - return x[i]; - } - - return x[0]; -} - -void kmemcheck_shadow_set(void *shadow, unsigned int size) -{ - uint8_t *x; - unsigned int i; - - x = shadow; - for (i = 0; i < size; ++i) - x[i] = KMEMCHECK_SHADOW_INITIALIZED; -} --- a/arch/x86/mm/kmemcheck/shadow.h +++ b/arch/x86/mm/kmemcheck/shadow.h @@ -1,19 +1 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#ifndef ARCH__X86__MM__KMEMCHECK__SHADOW_H -#define ARCH__X86__MM__KMEMCHECK__SHADOW_H - -enum kmemcheck_shadow { - KMEMCHECK_SHADOW_UNALLOCATED, - KMEMCHECK_SHADOW_UNINITIALIZED, - KMEMCHECK_SHADOW_INITIALIZED, - KMEMCHECK_SHADOW_FREED, -}; - -void *kmemcheck_shadow_lookup(unsigned long address); - -enum kmemcheck_shadow kmemcheck_shadow_test(void *shadow, unsigned int size); -enum kmemcheck_shadow kmemcheck_shadow_test_all(void *shadow, - unsigned int size); -void kmemcheck_shadow_set(void *shadow, unsigned int size); - -#endif --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -594,21 +594,6 @@ static inline void tasklet_hi_schedule(s __tasklet_hi_schedule(t); }

-extern void __tasklet_hi_schedule_first(struct tasklet_struct *t); - -/* - * This version avoids touching any other tasklets. Needed for kmemcheck - * in order not to take any page faults while enqueueing this tasklet; - * consider VERY carefully whether you really need this or - * tasklet_hi_schedule()... - */ -static inline void tasklet_hi_schedule_first(struct tasklet_struct *t) -{ - if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state)) - __tasklet_hi_schedule_first(t); -} - - static inline void tasklet_disable_nosync(struct tasklet_struct *t) { atomic_inc(&t->count); --- a/include/linux/kmemcheck.h +++ b/include/linux/kmemcheck.h @@ -1,172 +1 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#ifndef LINUX_KMEMCHECK_H -#define LINUX_KMEMCHECK_H - -#include <linux/mm_types.h> -#include <linux/types.h> - -#ifdef CONFIG_KMEMCHECK -extern int kmemcheck_enabled; - -/* The slab-related functions. */ -void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node); -void kmemcheck_free_shadow(struct page *page, int order); -void kmemcheck_slab_alloc(struct kmem_cache *s, gfp_t gfpflags, void *object, - size_t size); -void kmemcheck_slab_free(struct kmem_cache *s, void *object, size_t size); - -void kmemcheck_pagealloc_alloc(struct page *p, unsigned int order, - gfp_t gfpflags); - -void kmemcheck_show_pages(struct page *p, unsigned int n); -void kmemcheck_hide_pages(struct page *p, unsigned int n); - -bool kmemcheck_page_is_tracked(struct page *p); - -void kmemcheck_mark_unallocated(void *address, unsigned int n); -void kmemcheck_mark_uninitialized(void *address, unsigned int n); -void kmemcheck_mark_initialized(void *address, unsigned int n); -void kmemcheck_mark_freed(void *address, unsigned int n); - -void kmemcheck_mark_unallocated_pages(struct page *p, unsigned int n); -void kmemcheck_mark_uninitialized_pages(struct page *p, unsigned int n); -void kmemcheck_mark_initialized_pages(struct page *p, unsigned int n); - -int kmemcheck_show_addr(unsigned long address); -int kmemcheck_hide_addr(unsigned long address); - -bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size); - -/* - * Bitfield annotations - * - * How to use: If you have a struct using bitfields, for example - * - * struct a { - * int x:8, y:8; - * }; - * - * then this should be rewritten as - * - * struct a { - * kmemcheck_bitfield_begin(flags); - * int x:8, y:8; - * kmemcheck_bitfield_end(flags); - * }; - * - * Now the "flags_begin" and "flags_end" members may be used to refer to the - * beginning and end, respectively, of the bitfield (and things like - * &x.flags_begin is allowed). As soon as the struct is allocated, the bit- - * fields should be annotated: - * - * struct a *a = kmalloc(sizeof(struct a), GFP_KERNEL); - * kmemcheck_annotate_bitfield(a, flags); - */ -#define kmemcheck_bitfield_begin(name) \ - int name##_begin[0]; - -#define kmemcheck_bitfield_end(name) \ - int name##_end[0]; - -#define kmemcheck_annotate_bitfield(ptr, name) \ - do { \ - int _n; \ - \ - if (!ptr) \ - break; \ - \ - _n = (long) &((ptr)->name##_end) \ - - (long) &((ptr)->name##_begin); \ - BUILD_BUG_ON(_n < 0); \ - \ - kmemcheck_mark_initialized(&((ptr)->name##_begin), _n); \ - } while (0) - -#define kmemcheck_annotate_variable(var) \ - do { \ - kmemcheck_mark_initialized(&(var), sizeof(var)); \ - } while (0) \ - -#else -#define kmemcheck_enabled 0 - -static inline void -kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node) -{ -} - -static inline void -kmemcheck_free_shadow(struct page *page, int order) -{ -} - -static inline void -kmemcheck_slab_alloc(struct kmem_cache *s, gfp_t gfpflags, void *object, - size_t size) -{ -} - -static inline void kmemcheck_slab_free(struct kmem_cache *s, void *object, - size_t size) -{ -} - -static inline void kmemcheck_pagealloc_alloc(struct page *p, - unsigned int order, gfp_t gfpflags) -{ -} - -static inline bool kmemcheck_page_is_tracked(struct page *p) -{ - return false; -} - -static inline void kmemcheck_mark_unallocated(void *address, unsigned int n) -{ -} - -static inline void kmemcheck_mark_uninitialized(void *address, unsigned int n) -{ -} - -static inline void kmemcheck_mark_initialized(void *address, unsigned int n) -{ -} - -static inline void kmemcheck_mark_freed(void *address, unsigned int n) -{ -} - -static inline void kmemcheck_mark_unallocated_pages(struct page *p, - unsigned int n) -{ -} - -static inline void kmemcheck_mark_uninitialized_pages(struct page *p, - unsigned int n) -{ -} - -static inline void kmemcheck_mark_initialized_pages(struct page *p, - unsigned int n) -{ -} - -static inline bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size) -{ - return true; -} - -#define kmemcheck_bitfield_begin(name) -#define kmemcheck_bitfield_end(name) -#define kmemcheck_annotate_bitfield(ptr, name) \ - do { \ - } while (0) - -#define kmemcheck_annotate_variable(var) \ - do { \ - } while (0) - -#endif /* CONFIG_KMEMCHECK */ - -#endif /* LINUX_KMEMCHECK_H */ --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -486,16 +486,6 @@ void __tasklet_hi_schedule(struct taskle } EXPORT_SYMBOL(__tasklet_hi_schedule);

-void __tasklet_hi_schedule_first(struct tasklet_struct *t) -{ - BUG_ON(!irqs_disabled()); - - t->next = __this_cpu_read(tasklet_hi_vec.head); - __this_cpu_write(tasklet_hi_vec.head, t); - __raise_softirq_irqoff(HI_SOFTIRQ); -} -EXPORT_SYMBOL(__tasklet_hi_schedule_first); - static __latent_entropy void tasklet_action(struct softirq_action *a) { struct tasklet_struct *list; --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -30,7 +30,6 @@ #include <linux/proc_fs.h> #include <linux/security.h> #include <linux/ctype.h> -#include <linux/kmemcheck.h> #include <linux/kmemleak.h> #include <linux/fs.h> #include <linux/init.h> @@ -1174,15 +1173,6 @@ static struct ctl_table kern_table[] = { .extra2 = &one_thousand, }, #endif -#ifdef CONFIG_KMEMCHECK - { - .procname = "kmemcheck", - .data = &kmemcheck_enabled, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec, - }, -#endif { .procname = "panic_on_warn", .data = &panic_on_warn, --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -504,7 +504,7 @@ config DEBUG_OBJECTS_ENABLE_DEFAULT

config DEBUG_SLAB bool "Debug slab memory allocations" - depends on DEBUG_KERNEL && SLAB && !KMEMCHECK + depends on DEBUG_KERNEL && SLAB help Say Y here to have the kernel do limited verification on memory allocation as well as poisoning memory on free to catch use of freed @@ -516,7 +516,7 @@ config DEBUG_SLAB_LEAK

config SLUB_DEBUG_ON bool "SLUB debugging on by default" - depends on SLUB && SLUB_DEBUG && !KMEMCHECK + depends on SLUB && SLUB_DEBUG default n help Boot with debugging on by default. SLUB boots by default with @@ -730,8 +730,6 @@ config DEBUG_STACKOVERFLOW

If in doubt, say "N".

-source "lib/Kconfig.kmemcheck" - source "lib/Kconfig.kasan"

endmenu # "Memory Debugging" --- a/lib/Kconfig.kmemcheck +++ /dev/null @@ -1,94 +0,0 @@ -config HAVE_ARCH_KMEMCHECK - bool - -if HAVE_ARCH_KMEMCHECK - -menuconfig KMEMCHECK - bool "kmemcheck: trap use of uninitialized memory" - depends on DEBUG_KERNEL - depends on !X86_USE_3DNOW - depends on SLUB || SLAB - depends on !CC_OPTIMIZE_FOR_SIZE - depends on !FUNCTION_TRACER - select FRAME_POINTER - select STACKTRACE - default n - help - This option enables tracing of dynamically allocated kernel memory - to see if memory is used before it has been given an initial value. - Be aware that this requires half of your memory for bookkeeping and - will insert extra code at *every* read and write to tracked memory - thus slow down the kernel code (but user code is unaffected). - - The kernel may be started with kmemcheck=0 or kmemcheck=1 to disable - or enable kmemcheck at boot-time. If the kernel is started with - kmemcheck=0, the large memory and CPU overhead is not incurred. - -choice - prompt "kmemcheck: default mode at boot" - depends on KMEMCHECK - default KMEMCHECK_ONESHOT_BY_DEFAULT - help - This option controls the default behaviour of kmemcheck when the - kernel boots and no kmemcheck= parameter is given. - -config KMEMCHECK_DISABLED_BY_DEFAULT - bool "disabled" - depends on KMEMCHECK - -config KMEMCHECK_ENABLED_BY_DEFAULT - bool "enabled" - depends on KMEMCHECK - -config KMEMCHECK_ONESHOT_BY_DEFAULT - bool "one-shot" - depends on KMEMCHECK - help - In one-shot mode, only the first error detected is reported before - kmemcheck is disabled. - -endchoice - -config KMEMCHECK_QUEUE_SIZE - int "kmemcheck: error queue size" - depends on KMEMCHECK - default 64 - help - Select the maximum number of errors to store in the queue. Since - errors can occur virtually anywhere and in any context, we need a - temporary storage area which is guarantueed not to generate any - other faults. The queue will be emptied as soon as a tasklet may - be scheduled. If the queue is full, new error reports will be - lost. - -config KMEMCHECK_SHADOW_COPY_SHIFT - int "kmemcheck: shadow copy size (5 => 32 bytes, 6 => 64 bytes)" - depends on KMEMCHECK - range 2 8 - default 5 - help - Select the number of shadow bytes to save along with each entry of - the queue. These bytes indicate what parts of an allocation are - initialized, uninitialized, etc. and will be displayed when an - error is detected to help the debugging of a particular problem. - -config KMEMCHECK_PARTIAL_OK - bool "kmemcheck: allow partially uninitialized memory" - depends on KMEMCHECK - default y - help - This option works around certain GCC optimizations that produce - 32-bit reads from 16-bit variables where the upper 16 bits are - thrown away afterwards. This may of course also hide some real - bugs. - -config KMEMCHECK_BITOPS_OK - bool "kmemcheck: allow bit-field manipulation" - depends on KMEMCHECK - default n - help - This option silences warnings that would be generated for bit-field - accesses where not all the bits are initialized at the same time. - This may also hide some real bugs. - -endif --- a/mm/Kconfig.debug +++ b/mm/Kconfig.debug @@ -11,7 +11,6 @@ config DEBUG_PAGEALLOC bool "Debug page memory allocations" depends on DEBUG_KERNEL depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC - depends on !KMEMCHECK select PAGE_EXTENSION select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC ---help--- --- a/mm/Makefile +++ b/mm/Makefile @@ -17,7 +17,6 @@ KCOV_INSTRUMENT_slub.o := n KCOV_INSTRUMENT_page_alloc.o := n KCOV_INSTRUMENT_debug-pagealloc.o := n KCOV_INSTRUMENT_kmemleak.o := n -KCOV_INSTRUMENT_kmemcheck.o := n KCOV_INSTRUMENT_memcontrol.o := n KCOV_INSTRUMENT_mmzone.o := n KCOV_INSTRUMENT_vmstat.o := n @@ -70,7 +69,6 @@ obj-$(CONFIG_KSM) += ksm.o obj-$(CONFIG_PAGE_POISONING) += page_poison.o obj-$(CONFIG_SLAB) += slab.o obj-$(CONFIG_SLUB) += slub.o -obj-$(CONFIG_KMEMCHECK) += kmemcheck.o obj-$(CONFIG_KASAN) += kasan/ obj-$(CONFIG_FAILSLAB) += failslab.o obj-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o --- a/mm/kmemcheck.c +++ b/mm/kmemcheck.c @@ -1,126 +1 @@ // SPDX-License-Identifier: GPL-2.0 -#include <linux/gfp.h> -#include <linux/mm_types.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include "slab.h" -#include <linux/kmemcheck.h> - -void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node) -{ - struct page *shadow; - int pages; - int i; - - pages = 1 << order; - - /* - * With kmemcheck enabled, we need to allocate a memory area for the - * shadow bits as well. - */ - shadow = alloc_pages_node(node, flags, order); - if (!shadow) { - if (printk_ratelimit()) - pr_err("kmemcheck: failed to allocate shadow bitmap\n"); - return; - } - - for(i = 0; i < pages; ++i) - page[i].shadow = page_address(&shadow[i]); - - /* - * Mark it as non-present for the MMU so that our accesses to - * this memory will trigger a page fault and let us analyze - * the memory accesses. - */ - kmemcheck_hide_pages(page, pages); -} - -void kmemcheck_free_shadow(struct page *page, int order) -{ - struct page *shadow; - int pages; - int i; - - if (!kmemcheck_page_is_tracked(page)) - return; - - pages = 1 << order; - - kmemcheck_show_pages(page, pages); - - shadow = virt_to_page(page[0].shadow); - - for(i = 0; i < pages; ++i) - page[i].shadow = NULL; - - __free_pages(shadow, order); -} - -void kmemcheck_slab_alloc(struct kmem_cache *s, gfp_t gfpflags, void *object, - size_t size) -{ - if (unlikely(!object)) /* Skip object if allocation failed */ - return; - - /* - * Has already been memset(), which initializes the shadow for us - * as well. - */ - if (gfpflags & __GFP_ZERO) - return; - - /* No need to initialize the shadow of a non-tracked slab. */ - if (s->flags & SLAB_NOTRACK) - return; - - if (!kmemcheck_enabled || gfpflags & __GFP_NOTRACK) { - /* - * Allow notracked objects to be allocated from - * tracked caches. Note however that these objects - * will still get page faults on access, they just - * won't ever be flagged as uninitialized. If page - * faults are not acceptable, the slab cache itself - * should be marked NOTRACK. - */ - kmemcheck_mark_initialized(object, size); - } else if (!s->ctor) { - /* - * New objects should be marked uninitialized before - * they're returned to the called. - */ - kmemcheck_mark_uninitialized(object, size); - } -} - -void kmemcheck_slab_free(struct kmem_cache *s, void *object, size_t size) -{ - /* TODO: RCU freeing is unsupported for now; hide false positives. */ - if (!s->ctor && !(s->flags & SLAB_TYPESAFE_BY_RCU)) - kmemcheck_mark_freed(object, size); -} - -void kmemcheck_pagealloc_alloc(struct page *page, unsigned int order, - gfp_t gfpflags) -{ - int pages; - - if (gfpflags & (__GFP_HIGHMEM | __GFP_NOTRACK)) - return; - - pages = 1 << order; - - /* - * NOTE: We choose to track GFP_ZERO pages too; in fact, they - * can become uninitialized by copying uninitialized memory - * into them. - */ - - /* XXX: Can use zone->node for node? */ - kmemcheck_alloc_shadow(page, order, gfpflags, -1); - - if (gfpflags & __GFP_ZERO) - kmemcheck_mark_initialized_pages(page, pages); - else - kmemcheck_mark_uninitialized_pages(page, pages); -} --- a/mm/slub.c +++ b/mm/slub.c @@ -1369,7 +1369,7 @@ static inline void *slab_free_hook(struc * So in order to make the debug calls that expect irqs to be * disabled we need to disable interrupts temporarily. */ -#if defined(CONFIG_KMEMCHECK) || defined(CONFIG_LOCKDEP) +#ifdef CONFIG_LOCKDEP { unsigned long flags;

@@ -1397,8 +1397,7 @@ static inline void slab_free_freelist_ho * Compiler cannot detect this function can be removed if slab_free_hook() * evaluates to nothing. Thus, catch all relevant config debug options here. */ -#if defined(CONFIG_KMEMCHECK) || \ - defined(CONFIG_LOCKDEP) || \ +#if defined(CONFIG_LOCKDEP) || \ defined(CONFIG_DEBUG_KMEMLEAK) || \ defined(CONFIG_DEBUG_OBJECTS_FREE) || \ defined(CONFIG_KASAN) --- a/scripts/kernel-doc +++ b/scripts/kernel-doc @@ -2182,8 +2182,6 @@ sub dump_struct($$) { # strip comments: $members =~ s//*.*?*///gos; $nested =~ s//*.*?*///gos; - # strip kmemcheck_bitfield_{begin,end}.*; - $members =~ s/kmemcheck_bitfield_.*?;//gos; # strip attributes $members =~ s/__attribute__\s*(([a-z,_*\s()]*))//i; $members =~ s/__aligned\s*([^;]*)//gos; --- a/tools/include/linux/kmemcheck.h +++ b/tools/include/linux/kmemcheck.h @@ -1,9 +1 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _LIBLOCKDEP_LINUX_KMEMCHECK_H_ -#define _LIBLOCKDEP_LINUX_KMEMCHECK_H_ - -static inline void kmemcheck_mark_initialized(void *address, unsigned int n) -{ -} - -#endif

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Andy Lutomirski luto@kernel.org

commit 1299ef1d8870d2d9f09a5aadf2f8b2c887c2d033 upstream.

flush_tlb_single() and flush_tlb_one() sound almost identical, but they really mean "flush one user translation" and "flush one kernel translation". Rename them to flush_tlb_one_user() and flush_tlb_one_kernel() to make the semantics more obvious.

[ I was looking at some PTI-related code, and the flush-one-address code is unnecessarily hard to understand because the names of the helpers are uninformative. This came up during PTI review, but no one got around to doing it. ]

Signed-off-by: Andy Lutomirski luto@kernel.org Acked-by: Peter Zijlstra (Intel) peterz@infradead.org Cc: Boris Ostrovsky boris.ostrovsky@oracle.com Cc: Borislav Petkov bp@alien8.de Cc: Brian Gerst brgerst@gmail.com Cc: Dave Hansen dave.hansen@intel.com Cc: Eduardo Valentin eduval@amazon.com Cc: Hugh Dickins hughd@google.com Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Juergen Gross jgross@suse.com Cc: Kees Cook keescook@google.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Linux-MM linux-mm@kvack.org Cc: Rik van Riel riel@redhat.com Cc: Thomas Gleixner tglx@linutronix.de Cc: Will Deacon will.deacon@arm.com Link: http://lkml.kernel.org/r/3303b02e3c3d049dc5235d5651e0ae6d29a34354.1517414378... Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/include/asm/paravirt.h | 4 ++-- arch/x86/include/asm/paravirt_types.h | 2 +- arch/x86/include/asm/pgtable_32.h | 2 +- arch/x86/include/asm/tlbflush.h | 27 ++++++++++++++++++++------- arch/x86/kernel/acpi/apei.c | 2 +- arch/x86/kernel/paravirt.c | 6 +++--- arch/x86/mm/init_64.c | 2 +- arch/x86/mm/ioremap.c | 2 +- arch/x86/mm/kmmio.c | 2 +- arch/x86/mm/pgtable_32.c | 2 +- arch/x86/mm/tlb.c | 6 +++--- arch/x86/platform/uv/tlb_uv.c | 2 +- arch/x86/xen/mmu_pv.c | 6 +++--- include/trace/events/xen.h | 2 +- 14 files changed, 40 insertions(+), 27 deletions(-)

--- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -297,9 +297,9 @@ static inline void __flush_tlb_global(vo { PVOP_VCALL0(pv_mmu_ops.flush_tlb_kernel); } -static inline void __flush_tlb_single(unsigned long addr) +static inline void __flush_tlb_one_user(unsigned long addr) { - PVOP_VCALL1(pv_mmu_ops.flush_tlb_single, addr); + PVOP_VCALL1(pv_mmu_ops.flush_tlb_one_user, addr); }

static inline void flush_tlb_others(const struct cpumask *cpumask, --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -217,7 +217,7 @@ struct pv_mmu_ops { /* TLB operations */ void (*flush_tlb_user)(void); void (*flush_tlb_kernel)(void); - void (*flush_tlb_single)(unsigned long addr); + void (*flush_tlb_one_user)(unsigned long addr); void (*flush_tlb_others)(const struct cpumask *cpus, const struct flush_tlb_info *info);

--- a/arch/x86/include/asm/pgtable_32.h +++ b/arch/x86/include/asm/pgtable_32.h @@ -61,7 +61,7 @@ void paging_init(void); #define kpte_clear_flush(ptep, vaddr) \ do { \ pte_clear(&init_mm, (vaddr), (ptep)); \ - __flush_tlb_one((vaddr)); \ + __flush_tlb_one_kernel((vaddr)); \ } while (0)

#endif /* !__ASSEMBLY__ */ --- a/arch/x86/include/asm/tlbflush.h +++ b/arch/x86/include/asm/tlbflush.h @@ -140,7 +140,7 @@ static inline unsigned long build_cr3_no #else #define __flush_tlb() __native_flush_tlb() #define __flush_tlb_global() __native_flush_tlb_global() -#define __flush_tlb_single(addr) __native_flush_tlb_single(addr) +#define __flush_tlb_one_user(addr) __native_flush_tlb_one_user(addr) #endif

static inline bool tlb_defer_switch_to_init_mm(void) @@ -397,7 +397,7 @@ static inline void __native_flush_tlb_gl /* * flush one page in the user mapping */ -static inline void __native_flush_tlb_single(unsigned long addr) +static inline void __native_flush_tlb_one_user(unsigned long addr) { u32 loaded_mm_asid = this_cpu_read(cpu_tlbstate.loaded_mm_asid);

@@ -434,18 +434,31 @@ static inline void __flush_tlb_all(void) /* * flush one page in the kernel mapping */ -static inline void __flush_tlb_one(unsigned long addr) +static inline void __flush_tlb_one_kernel(unsigned long addr) { count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ONE); - __flush_tlb_single(addr); + + /* + * If PTI is off, then __flush_tlb_one_user() is just INVLPG or its + * paravirt equivalent. Even with PCID, this is sufficient: we only + * use PCID if we also use global PTEs for the kernel mapping, and + * INVLPG flushes global translations across all address spaces. + * + * If PTI is on, then the kernel is mapped with non-global PTEs, and + * __flush_tlb_one_user() will flush the given address for the current + * kernel address space and for its usermode counterpart, but it does + * not flush it for other address spaces. + */ + __flush_tlb_one_user(addr);

if (!static_cpu_has(X86_FEATURE_PTI)) return;

/* - * __flush_tlb_single() will have cleared the TLB entry for this ASID, - * but since kernel space is replicated across all, we must also - * invalidate all others. + * See above. We need to propagate the flush to all other address + * spaces. In principle, we only need to propagate it to kernelmode + * address spaces, but the extra bookkeeping we would need is not + * worth it. */ invalidate_other_asid(); } --- a/arch/x86/kernel/acpi/apei.c +++ b/arch/x86/kernel/acpi/apei.c @@ -55,5 +55,5 @@ void arch_apei_report_mem_error(int sev,

void arch_apei_flush_tlb_one(unsigned long addr) { - __flush_tlb_one(addr); + __flush_tlb_one_kernel(addr); } --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -190,9 +190,9 @@ static void native_flush_tlb_global(void __native_flush_tlb_global(); }

-static void native_flush_tlb_single(unsigned long addr) +static void native_flush_tlb_one_user(unsigned long addr) { - __native_flush_tlb_single(addr); + __native_flush_tlb_one_user(addr); }

struct static_key paravirt_steal_enabled; @@ -391,7 +391,7 @@ struct pv_mmu_ops pv_mmu_ops __ro_after_

.flush_tlb_user = native_flush_tlb, .flush_tlb_kernel = native_flush_tlb_global, - .flush_tlb_single = native_flush_tlb_single, + .flush_tlb_one_user = native_flush_tlb_one_user, .flush_tlb_others = native_flush_tlb_others,

.pgd_alloc = __paravirt_pgd_alloc, --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -256,7 +256,7 @@ static void __set_pte_vaddr(pud_t *pud, * It's enough to flush this one mapping. * (PGE mappings get flushed as well) */ - __flush_tlb_one(vaddr); + __flush_tlb_one_kernel(vaddr); }

void set_pte_vaddr_p4d(p4d_t *p4d_page, unsigned long vaddr, pte_t new_pte) --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -749,5 +749,5 @@ void __init __early_set_fixmap(enum fixe set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags)); else pte_clear(&init_mm, addr, pte); - __flush_tlb_one(addr); + __flush_tlb_one_kernel(addr); } --- a/arch/x86/mm/kmmio.c +++ b/arch/x86/mm/kmmio.c @@ -168,7 +168,7 @@ static int clear_page_presence(struct km return -1; }

- __flush_tlb_one(f->addr); + __flush_tlb_one_kernel(f->addr); return 0; }

--- a/arch/x86/mm/pgtable_32.c +++ b/arch/x86/mm/pgtable_32.c @@ -63,7 +63,7 @@ void set_pte_vaddr(unsigned long vaddr, * It's enough to flush this one mapping. * (PGE mappings get flushed as well) */ - __flush_tlb_one(vaddr); + __flush_tlb_one_kernel(vaddr); }

unsigned long __FIXADDR_TOP = 0xfffff000; --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -492,7 +492,7 @@ static void flush_tlb_func_common(const * flush that changes context.tlb_gen from 2 to 3. If they get * processed on this CPU in reverse order, we'll see * local_tlb_gen == 1, mm_tlb_gen == 3, and end != TLB_FLUSH_ALL. - * If we were to use __flush_tlb_single() and set local_tlb_gen to + * If we were to use __flush_tlb_one_user() and set local_tlb_gen to * 3, we'd be break the invariant: we'd update local_tlb_gen above * 1 without the full flush that's needed for tlb_gen 2. * @@ -513,7 +513,7 @@ static void flush_tlb_func_common(const

addr = f->start; while (addr < f->end) { - __flush_tlb_single(addr); + __flush_tlb_one_user(addr); addr += PAGE_SIZE; } if (local) @@ -660,7 +660,7 @@ static void do_kernel_range_flush(void *

/* flush range by one by one 'invlpg' */ for (addr = f->start; addr < f->end; addr += PAGE_SIZE) - __flush_tlb_one(addr); + __flush_tlb_one_kernel(addr); }

void flush_tlb_kernel_range(unsigned long start, unsigned long end) --- a/arch/x86/platform/uv/tlb_uv.c +++ b/arch/x86/platform/uv/tlb_uv.c @@ -299,7 +299,7 @@ static void bau_process_message(struct m local_flush_tlb(); stat->d_alltlb++; } else { - __flush_tlb_single(msg->address); + __flush_tlb_one_user(msg->address); stat->d_onetlb++; } stat->d_requestee++; --- a/arch/x86/xen/mmu_pv.c +++ b/arch/x86/xen/mmu_pv.c @@ -1300,12 +1300,12 @@ static void xen_flush_tlb(void) preempt_enable(); }

-static void xen_flush_tlb_single(unsigned long addr) +static void xen_flush_tlb_one_user(unsigned long addr) { struct mmuext_op *op; struct multicall_space mcs;

- trace_xen_mmu_flush_tlb_single(addr); + trace_xen_mmu_flush_tlb_one_user(addr);

preempt_disable();

@@ -2360,7 +2360,7 @@ static const struct pv_mmu_ops xen_mmu_o

.flush_tlb_user = xen_flush_tlb, .flush_tlb_kernel = xen_flush_tlb, - .flush_tlb_single = xen_flush_tlb_single, + .flush_tlb_one_user = xen_flush_tlb_one_user, .flush_tlb_others = xen_flush_tlb_others,

.pgd_alloc = xen_pgd_alloc, --- a/include/trace/events/xen.h +++ b/include/trace/events/xen.h @@ -365,7 +365,7 @@ TRACE_EVENT(xen_mmu_flush_tlb, TP_printk("%s", "") );

-TRACE_EVENT(xen_mmu_flush_tlb_single, +TRACE_EVENT(xen_mmu_flush_tlb_one_user, TP_PROTO(unsigned long addr), TP_ARGS(addr), TP_STRUCT__entry(

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Jia Zhang qianyue.zj@alibaba-inc.com

commit b399151cb48db30ad1e0e93dd40d68c6d007b637 upstream.

x86_mask is a confusing name which is hard to associate with the processor's stepping.

Additionally, correct an indent issue in lib/cpu.c.

Signed-off-by: Jia Zhang qianyue.zj@alibaba-inc.com [ Updated it to more recent kernels. ] Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: bp@alien8.de Cc: tony.luck@intel.com Link: http://lkml.kernel.org/r/1514771530-70829-1-git-send-email-qianyue.zj@alibab... Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/events/intel/core.c | 2 +- arch/x86/events/intel/lbr.c | 2 +- arch/x86/events/intel/p6.c | 2 +- arch/x86/include/asm/acpi.h | 2 +- arch/x86/include/asm/processor.h | 2 +- arch/x86/kernel/amd_nb.c | 2 +- arch/x86/kernel/apic/apic.c | 6 +++--- arch/x86/kernel/asm-offsets_32.c | 2 +- arch/x86/kernel/cpu/amd.c | 28 ++++++++++++++-------------- arch/x86/kernel/cpu/centaur.c | 4 ++-- arch/x86/kernel/cpu/common.c | 8 ++++---- arch/x86/kernel/cpu/cyrix.c | 2 +- arch/x86/kernel/cpu/intel.c | 18 +++++++++--------- arch/x86/kernel/cpu/intel_rdt.c | 2 +- arch/x86/kernel/cpu/microcode/intel.c | 4 ++-- arch/x86/kernel/cpu/mtrr/generic.c | 2 +- arch/x86/kernel/cpu/mtrr/main.c | 4 ++-- arch/x86/kernel/cpu/proc.c | 4 ++-- arch/x86/kernel/head_32.S | 4 ++-- arch/x86/kernel/mpparse.c | 2 +- arch/x86/lib/cpu.c | 2 +- drivers/char/hw_random/via-rng.c | 2 +- drivers/cpufreq/acpi-cpufreq.c | 2 +- drivers/cpufreq/longhaul.c | 6 +++--- drivers/cpufreq/p4-clockmod.c | 2 +- drivers/cpufreq/powernow-k7.c | 2 +- drivers/cpufreq/speedstep-centrino.c | 4 ++-- drivers/cpufreq/speedstep-lib.c | 6 +++--- drivers/crypto/padlock-aes.c | 2 +- drivers/edac/amd64_edac.c | 2 +- drivers/hwmon/coretemp.c | 6 +++--- drivers/hwmon/hwmon-vid.c | 2 +- drivers/hwmon/k10temp.c | 2 +- drivers/hwmon/k8temp.c | 2 +- drivers/video/fbdev/geode/video_gx.c | 2 +- 35 files changed, 73 insertions(+), 73 deletions(-)

--- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -3559,7 +3559,7 @@ static int intel_snb_pebs_broken(int cpu break;

case INTEL_FAM6_SANDYBRIDGE_X: - switch (cpu_data(cpu).x86_mask) { + switch (cpu_data(cpu).x86_stepping) { case 6: rev = 0x618; break; case 7: rev = 0x70c; break; } --- a/arch/x86/events/intel/lbr.c +++ b/arch/x86/events/intel/lbr.c @@ -1186,7 +1186,7 @@ void __init intel_pmu_lbr_init_atom(void * on PMU interrupt */ if (boot_cpu_data.x86_model == 28 - && boot_cpu_data.x86_mask < 10) { + && boot_cpu_data.x86_stepping < 10) { pr_cont("LBR disabled due to erratum"); return; } --- a/arch/x86/events/intel/p6.c +++ b/arch/x86/events/intel/p6.c @@ -234,7 +234,7 @@ static __initconst const struct x86_pmu

static __init void p6_pmu_rdpmc_quirk(void) { - if (boot_cpu_data.x86_mask < 9) { + if (boot_cpu_data.x86_stepping < 9) { /* * PPro erratum 26; fixed in stepping 9 and above. */ --- a/arch/x86/include/asm/acpi.h +++ b/arch/x86/include/asm/acpi.h @@ -94,7 +94,7 @@ static inline unsigned int acpi_processo if (boot_cpu_data.x86 == 0x0F && boot_cpu_data.x86_vendor == X86_VENDOR_AMD && boot_cpu_data.x86_model <= 0x05 && - boot_cpu_data.x86_mask < 0x0A) + boot_cpu_data.x86_stepping < 0x0A) return 1; else if (boot_cpu_has(X86_BUG_AMD_APIC_C1E)) return 1; --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -91,7 +91,7 @@ struct cpuinfo_x86 { __u8 x86; /* CPU family */ __u8 x86_vendor; /* CPU vendor */ __u8 x86_model; - __u8 x86_mask; + __u8 x86_stepping; #ifdef CONFIG_X86_64 /* Number of 4K pages in DTLB/ITLB combined(in pages): */ int x86_tlbsize; --- a/arch/x86/kernel/amd_nb.c +++ b/arch/x86/kernel/amd_nb.c @@ -235,7 +235,7 @@ int amd_cache_northbridges(void) if (boot_cpu_data.x86 == 0x10 && boot_cpu_data.x86_model >= 0x8 && (boot_cpu_data.x86_model > 0x9 || - boot_cpu_data.x86_mask >= 0x1)) + boot_cpu_data.x86_stepping >= 0x1)) amd_northbridges.flags |= AMD_NB_L3_INDEX_DISABLE;

if (boot_cpu_data.x86 == 0x15) --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -553,7 +553,7 @@ static DEFINE_PER_CPU(struct clock_event

static u32 hsx_deadline_rev(void) { - switch (boot_cpu_data.x86_mask) { + switch (boot_cpu_data.x86_stepping) { case 0x02: return 0x3a; /* EP */ case 0x04: return 0x0f; /* EX */ } @@ -563,7 +563,7 @@ static u32 hsx_deadline_rev(void)

static u32 bdx_deadline_rev(void) { - switch (boot_cpu_data.x86_mask) { + switch (boot_cpu_data.x86_stepping) { case 0x02: return 0x00000011; case 0x03: return 0x0700000e; case 0x04: return 0x0f00000c; @@ -575,7 +575,7 @@ static u32 bdx_deadline_rev(void)

static u32 skx_deadline_rev(void) { - switch (boot_cpu_data.x86_mask) { + switch (boot_cpu_data.x86_stepping) { case 0x03: return 0x01000136; case 0x04: return 0x02000014; } --- a/arch/x86/kernel/asm-offsets_32.c +++ b/arch/x86/kernel/asm-offsets_32.c @@ -18,7 +18,7 @@ void foo(void) OFFSET(CPUINFO_x86, cpuinfo_x86, x86); OFFSET(CPUINFO_x86_vendor, cpuinfo_x86, x86_vendor); OFFSET(CPUINFO_x86_model, cpuinfo_x86, x86_model); - OFFSET(CPUINFO_x86_mask, cpuinfo_x86, x86_mask); + OFFSET(CPUINFO_x86_stepping, cpuinfo_x86, x86_stepping); OFFSET(CPUINFO_cpuid_level, cpuinfo_x86, cpuid_level); OFFSET(CPUINFO_x86_capability, cpuinfo_x86, x86_capability); OFFSET(CPUINFO_x86_vendor_id, cpuinfo_x86, x86_vendor_id); --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -119,7 +119,7 @@ static void init_amd_k6(struct cpuinfo_x return; }

- if (c->x86_model == 6 && c->x86_mask == 1) { + if (c->x86_model == 6 && c->x86_stepping == 1) { const int K6_BUG_LOOP = 1000000; int n; void (*f_vide)(void); @@ -149,7 +149,7 @@ static void init_amd_k6(struct cpuinfo_x

/* K6 with old style WHCR */ if (c->x86_model < 8 || - (c->x86_model == 8 && c->x86_mask < 8)) { + (c->x86_model == 8 && c->x86_stepping < 8)) { /* We can only write allocate on the low 508Mb */ if (mbytes > 508) mbytes = 508; @@ -168,7 +168,7 @@ static void init_amd_k6(struct cpuinfo_x return; }

- if ((c->x86_model == 8 && c->x86_mask > 7) || + if ((c->x86_model == 8 && c->x86_stepping > 7) || c->x86_model == 9 || c->x86_model == 13) { /* The more serious chips .. */

@@ -221,7 +221,7 @@ static void init_amd_k7(struct cpuinfo_x * are more robust with CLK_CTL set to 200xxxxx instead of 600xxxxx * As per AMD technical note 27212 0.2 */ - if ((c->x86_model == 8 && c->x86_mask >= 1) || (c->x86_model > 8)) { + if ((c->x86_model == 8 && c->x86_stepping >= 1) || (c->x86_model > 8)) { rdmsr(MSR_K7_CLK_CTL, l, h); if ((l & 0xfff00000) != 0x20000000) { pr_info("CPU: CLK_CTL MSR was %x. Reprogramming to %x\n", @@ -241,12 +241,12 @@ static void init_amd_k7(struct cpuinfo_x * but they are not certified as MP capable. */ /* Athlon 660/661 is valid. */ - if ((c->x86_model == 6) && ((c->x86_mask == 0) || - (c->x86_mask == 1))) + if ((c->x86_model == 6) && ((c->x86_stepping == 0) || + (c->x86_stepping == 1))) return;

/* Duron 670 is valid */ - if ((c->x86_model == 7) && (c->x86_mask == 0)) + if ((c->x86_model == 7) && (c->x86_stepping == 0)) return;

/* @@ -256,8 +256,8 @@ static void init_amd_k7(struct cpuinfo_x * See http://www.heise.de/newsticker/data/jow-18.10.01-000 for * more. */ - if (((c->x86_model == 6) && (c->x86_mask >= 2)) || - ((c->x86_model == 7) && (c->x86_mask >= 1)) || + if (((c->x86_model == 6) && (c->x86_stepping >= 2)) || + ((c->x86_model == 7) && (c->x86_stepping >= 1)) || (c->x86_model > 7)) if (cpu_has(c, X86_FEATURE_MP)) return; @@ -583,7 +583,7 @@ static void early_init_amd(struct cpuinf /* Set MTRR capability flag if appropriate */ if (c->x86 == 5) if (c->x86_model == 13 || c->x86_model == 9 || - (c->x86_model == 8 && c->x86_mask >= 8)) + (c->x86_model == 8 && c->x86_stepping >= 8)) set_cpu_cap(c, X86_FEATURE_K6_MTRR); #endif #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_PCI) @@ -769,7 +769,7 @@ static void init_amd_zn(struct cpuinfo_x * Fix erratum 1076: CPB feature bit not being set in CPUID. It affects * all up to and including B1. */ - if (c->x86_model <= 1 && c->x86_mask <= 1) + if (c->x86_model <= 1 && c->x86_stepping <= 1) set_cpu_cap(c, X86_FEATURE_CPB); }

@@ -880,11 +880,11 @@ static unsigned int amd_size_cache(struc /* AMD errata T13 (order #21922) */ if ((c->x86 == 6)) { /* Duron Rev A0 */ - if (c->x86_model == 3 && c->x86_mask == 0) + if (c->x86_model == 3 && c->x86_stepping == 0) size = 64; /* Tbird rev A1/A2 */ if (c->x86_model == 4 && - (c->x86_mask == 0 || c->x86_mask == 1)) + (c->x86_stepping == 0 || c->x86_stepping == 1)) size = 256; } return size; @@ -1021,7 +1021,7 @@ static bool cpu_has_amd_erratum(struct c }

/* OSVW unavailable or ID unknown, match family-model-stepping range */ - ms = (cpu->x86_model << 4) | cpu->x86_mask; + ms = (cpu->x86_model << 4) | cpu->x86_stepping; while ((range = *erratum++)) if ((cpu->x86 == AMD_MODEL_RANGE_FAMILY(range)) && (ms >= AMD_MODEL_RANGE_START(range)) && --- a/arch/x86/kernel/cpu/centaur.c +++ b/arch/x86/kernel/cpu/centaur.c @@ -136,7 +136,7 @@ static void init_centaur(struct cpuinfo_ clear_cpu_cap(c, X86_FEATURE_TSC); break; case 8: - switch (c->x86_mask) { + switch (c->x86_stepping) { default: name = "2"; break; @@ -211,7 +211,7 @@ centaur_size_cache(struct cpuinfo_x86 *c * - Note, it seems this may only be in engineering samples. */ if ((c->x86 == 6) && (c->x86_model == 9) && - (c->x86_mask == 1) && (size == 65)) + (c->x86_stepping == 1) && (size == 65)) size -= 1; return size; } --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -707,7 +707,7 @@ void cpu_detect(struct cpuinfo_x86 *c) cpuid(0x00000001, &tfms, &misc, &junk, &cap0); c->x86 = x86_family(tfms); c->x86_model = x86_model(tfms); - c->x86_mask = x86_stepping(tfms); + c->x86_stepping = x86_stepping(tfms);

if (cap0 & (1<<19)) { c->x86_clflush_size = ((misc >> 8) & 0xff) * 8; @@ -1162,7 +1162,7 @@ static void identify_cpu(struct cpuinfo_ c->loops_per_jiffy = loops_per_jiffy; c->x86_cache_size = -1; c->x86_vendor = X86_VENDOR_UNKNOWN; - c->x86_model = c->x86_mask = 0; /* So far unknown... */ + c->x86_model = c->x86_stepping = 0; /* So far unknown... */ c->x86_vendor_id[0] = '\0'; /* Unset */ c->x86_model_id[0] = '\0'; /* Unset */ c->x86_max_cores = 1; @@ -1353,8 +1353,8 @@ void print_cpu_info(struct cpuinfo_x86 *

pr_cont(" (family: 0x%x, model: 0x%x", c->x86, c->x86_model);

- if (c->x86_mask || c->cpuid_level >= 0) - pr_cont(", stepping: 0x%x)\n", c->x86_mask); + if (c->x86_stepping || c->cpuid_level >= 0) + pr_cont(", stepping: 0x%x)\n", c->x86_stepping); else pr_cont(")\n"); } --- a/arch/x86/kernel/cpu/cyrix.c +++ b/arch/x86/kernel/cpu/cyrix.c @@ -215,7 +215,7 @@ static void init_cyrix(struct cpuinfo_x8

/* common case step number/rev -- exceptions handled below */ c->x86_model = (dir1 >> 4) + 1; - c->x86_mask = dir1 & 0xf; + c->x86_stepping = dir1 & 0xf;

/* Now cook; the original recipe is by Channing Corn, from Cyrix. * We do the same thing for each generation: we work out --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -146,7 +146,7 @@ static bool bad_spectre_microcode(struct

for (i = 0; i < ARRAY_SIZE(spectre_bad_microcodes); i++) { if (c->x86_model == spectre_bad_microcodes[i].model && - c->x86_mask == spectre_bad_microcodes[i].stepping) + c->x86_stepping == spectre_bad_microcodes[i].stepping) return (c->microcode <= spectre_bad_microcodes[i].microcode); } return false; @@ -193,7 +193,7 @@ static void early_init_intel(struct cpui * need the microcode to have already been loaded... so if it is * not, recommend a BIOS update and disable large pages. */ - if (c->x86 == 6 && c->x86_model == 0x1c && c->x86_mask <= 2 && + if (c->x86 == 6 && c->x86_model == 0x1c && c->x86_stepping <= 2 && c->microcode < 0x20e) { pr_warn("Atom PSE erratum detected, BIOS microcode update recommended\n"); clear_cpu_cap(c, X86_FEATURE_PSE); @@ -209,7 +209,7 @@ static void early_init_intel(struct cpui

/* CPUID workaround for 0F33/0F34 CPU */ if (c->x86 == 0xF && c->x86_model == 0x3 - && (c->x86_mask == 0x3 || c->x86_mask == 0x4)) + && (c->x86_stepping == 0x3 || c->x86_stepping == 0x4)) c->x86_phys_bits = 36;

/* @@ -307,7 +307,7 @@ int ppro_with_ram_bug(void) if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model == 1 && - boot_cpu_data.x86_mask < 8) { + boot_cpu_data.x86_stepping < 8) { pr_info("Pentium Pro with Errata#50 detected. Taking evasive action.\n"); return 1; } @@ -324,7 +324,7 @@ static void intel_smp_check(struct cpuin * Mask B, Pentium, but not Pentium MMX */ if (c->x86 == 5 && - c->x86_mask >= 1 && c->x86_mask <= 4 && + c->x86_stepping >= 1 && c->x86_stepping <= 4 && c->x86_model <= 3) { /* * Remember we have B step Pentia with bugs @@ -367,7 +367,7 @@ static void intel_workarounds(struct cpu * SEP CPUID bug: Pentium Pro reports SEP but doesn't have it until * model 3 mask 3 */ - if ((c->x86<<8 | c->x86_model<<4 | c->x86_mask) < 0x633) + if ((c->x86<<8 | c->x86_model<<4 | c->x86_stepping) < 0x633) clear_cpu_cap(c, X86_FEATURE_SEP);

/* @@ -385,7 +385,7 @@ static void intel_workarounds(struct cpu * P4 Xeon erratum 037 workaround. * Hardware prefetcher may cause stale data to be loaded into the cache. */ - if ((c->x86 == 15) && (c->x86_model == 1) && (c->x86_mask == 1)) { + if ((c->x86 == 15) && (c->x86_model == 1) && (c->x86_stepping == 1)) { if (msr_set_bit(MSR_IA32_MISC_ENABLE, MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE_BIT) > 0) { pr_info("CPU: C0 stepping P4 Xeon detected.\n"); @@ -400,7 +400,7 @@ static void intel_workarounds(struct cpu * Specification Update"). */ if (boot_cpu_has(X86_FEATURE_APIC) && (c->x86<<8 | c->x86_model<<4) == 0x520 && - (c->x86_mask < 0x6 || c->x86_mask == 0xb)) + (c->x86_stepping < 0x6 || c->x86_stepping == 0xb)) set_cpu_bug(c, X86_BUG_11AP);

@@ -647,7 +647,7 @@ static void init_intel(struct cpuinfo_x8 case 6: if (l2 == 128) p = "Celeron (Mendocino)"; - else if (c->x86_mask == 0 || c->x86_mask == 5) + else if (c->x86_stepping == 0 || c->x86_stepping == 5) p = "Celeron-A"; break;

--- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -771,7 +771,7 @@ static __init void rdt_quirks(void) cache_alloc_hsw_probe(); break; case INTEL_FAM6_SKYLAKE_X: - if (boot_cpu_data.x86_mask <= 4) + if (boot_cpu_data.x86_stepping <= 4) set_rdt_options("!cmt,!mbmtotal,!mbmlocal,!l3cat"); } } --- a/arch/x86/kernel/cpu/microcode/intel.c +++ b/arch/x86/kernel/cpu/microcode/intel.c @@ -921,7 +921,7 @@ static bool is_blacklisted(unsigned int */ if (c->x86 == 6 && c->x86_model == INTEL_FAM6_BROADWELL_X && - c->x86_mask == 0x01 && + c->x86_stepping == 0x01 && llc_size_per_core > 2621440 && c->microcode < 0x0b000021) { pr_err_once("Erratum BDF90: late loading with revision < 0x0b000021 (0x%x) disabled.\n", c->microcode); @@ -944,7 +944,7 @@ static enum ucode_state request_microcod return UCODE_NFOUND;

sprintf(name, "intel-ucode/%02x-%02x-%02x", - c->x86, c->x86_model, c->x86_mask); + c->x86, c->x86_model, c->x86_stepping);

if (request_firmware_direct(&firmware, name, device)) { pr_debug("data file %s load failed\n", name); --- a/arch/x86/kernel/cpu/mtrr/generic.c +++ b/arch/x86/kernel/cpu/mtrr/generic.c @@ -859,7 +859,7 @@ int generic_validate_add_page(unsigned l */ if (is_cpu(INTEL) && boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model == 1 && - boot_cpu_data.x86_mask <= 7) { + boot_cpu_data.x86_stepping <= 7) { if (base & ((1 << (22 - PAGE_SHIFT)) - 1)) { pr_warn("mtrr: base(0x%lx000) is not 4 MiB aligned\n", base); return -EINVAL; --- a/arch/x86/kernel/cpu/mtrr/main.c +++ b/arch/x86/kernel/cpu/mtrr/main.c @@ -711,8 +711,8 @@ void __init mtrr_bp_init(void) if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && boot_cpu_data.x86 == 0xF && boot_cpu_data.x86_model == 0x3 && - (boot_cpu_data.x86_mask == 0x3 || - boot_cpu_data.x86_mask == 0x4)) + (boot_cpu_data.x86_stepping == 0x3 || + boot_cpu_data.x86_stepping == 0x4)) phys_addr = 36;

size_or_mask = SIZE_OR_MASK_BITS(phys_addr); --- a/arch/x86/kernel/cpu/proc.c +++ b/arch/x86/kernel/cpu/proc.c @@ -72,8 +72,8 @@ static int show_cpuinfo(struct seq_file c->x86_model, c->x86_model_id[0] ? c->x86_model_id : "unknown");

- if (c->x86_mask || c->cpuid_level >= 0) - seq_printf(m, "stepping\t: %d\n", c->x86_mask); + if (c->x86_stepping || c->cpuid_level >= 0) + seq_printf(m, "stepping\t: %d\n", c->x86_stepping); else seq_puts(m, "stepping\t: unknown\n"); if (c->microcode) --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -37,7 +37,7 @@ #define X86 new_cpu_data+CPUINFO_x86 #define X86_VENDOR new_cpu_data+CPUINFO_x86_vendor #define X86_MODEL new_cpu_data+CPUINFO_x86_model -#define X86_MASK new_cpu_data+CPUINFO_x86_mask +#define X86_STEPPING new_cpu_data+CPUINFO_x86_stepping #define X86_HARD_MATH new_cpu_data+CPUINFO_hard_math #define X86_CPUID new_cpu_data+CPUINFO_cpuid_level #define X86_CAPABILITY new_cpu_data+CPUINFO_x86_capability @@ -332,7 +332,7 @@ ENTRY(startup_32_smp) shrb $4,%al movb %al,X86_MODEL andb $0x0f,%cl # mask mask revision - movb %cl,X86_MASK + movb %cl,X86_STEPPING movl %edx,X86_CAPABILITY

.Lis486: --- a/arch/x86/kernel/mpparse.c +++ b/arch/x86/kernel/mpparse.c @@ -407,7 +407,7 @@ static inline void __init construct_defa processor.apicver = mpc_default_type > 4 ? 0x10 : 0x01; processor.cpuflag = CPU_ENABLED; processor.cpufeature = (boot_cpu_data.x86 << 8) | - (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask; + (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_stepping; processor.featureflag = boot_cpu_data.x86_capability[CPUID_1_EDX]; processor.reserved[0] = 0; processor.reserved[1] = 0; --- a/arch/x86/lib/cpu.c +++ b/arch/x86/lib/cpu.c @@ -18,7 +18,7 @@ unsigned int x86_model(unsigned int sig) { unsigned int fam, model;

- fam = x86_family(sig); + fam = x86_family(sig);

model = (sig >> 4) & 0xf;

--- a/drivers/char/hw_random/via-rng.c +++ b/drivers/char/hw_random/via-rng.c @@ -162,7 +162,7 @@ static int via_rng_init(struct hwrng *rn /* Enable secondary noise source on CPUs where it is present. */

/* Nehemiah stepping 8 and higher */ - if ((c->x86_model == 9) && (c->x86_mask > 7)) + if ((c->x86_model == 9) && (c->x86_stepping > 7)) lo |= VIA_NOISESRC2;

/* Esther */ --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -629,7 +629,7 @@ static int acpi_cpufreq_blacklist(struct if (c->x86_vendor == X86_VENDOR_INTEL) { if ((c->x86 == 15) && (c->x86_model == 6) && - (c->x86_mask == 8)) { + (c->x86_stepping == 8)) { pr_info("Intel(R) Xeon(R) 7100 Errata AL30, processors may lock up on frequency changes: disabling acpi-cpufreq\n"); return -ENODEV; } --- a/drivers/cpufreq/longhaul.c +++ b/drivers/cpufreq/longhaul.c @@ -775,7 +775,7 @@ static int longhaul_cpu_init(struct cpuf break;

case 7: - switch (c->x86_mask) { + switch (c->x86_stepping) { case 0: longhaul_version = TYPE_LONGHAUL_V1; cpu_model = CPU_SAMUEL2; @@ -787,7 +787,7 @@ static int longhaul_cpu_init(struct cpuf break; case 1 ... 15: longhaul_version = TYPE_LONGHAUL_V2; - if (c->x86_mask < 8) { + if (c->x86_stepping < 8) { cpu_model = CPU_SAMUEL2; cpuname = "C3 'Samuel 2' [C5B]"; } else { @@ -814,7 +814,7 @@ static int longhaul_cpu_init(struct cpuf numscales = 32; memcpy(mults, nehemiah_mults, sizeof(nehemiah_mults)); memcpy(eblcr, nehemiah_eblcr, sizeof(nehemiah_eblcr)); - switch (c->x86_mask) { + switch (c->x86_stepping) { case 0 ... 1: cpu_model = CPU_NEHEMIAH; cpuname = "C3 'Nehemiah A' [C5XLOE]"; --- a/drivers/cpufreq/p4-clockmod.c +++ b/drivers/cpufreq/p4-clockmod.c @@ -168,7 +168,7 @@ static int cpufreq_p4_cpu_init(struct cp #endif

/* Errata workaround */ - cpuid = (c->x86 << 8) | (c->x86_model << 4) | c->x86_mask; + cpuid = (c->x86 << 8) | (c->x86_model << 4) | c->x86_stepping; switch (cpuid) { case 0x0f07: case 0x0f0a: --- a/drivers/cpufreq/powernow-k7.c +++ b/drivers/cpufreq/powernow-k7.c @@ -131,7 +131,7 @@ static int check_powernow(void) return 0; }

- if ((c->x86_model == 6) && (c->x86_mask == 0)) { + if ((c->x86_model == 6) && (c->x86_stepping == 0)) { pr_info("K7 660[A0] core detected, enabling errata workarounds\n"); have_a0 = 1; } --- a/drivers/cpufreq/speedstep-centrino.c +++ b/drivers/cpufreq/speedstep-centrino.c @@ -37,7 +37,7 @@ struct cpu_id { __u8 x86; /* CPU family */ __u8 x86_model; /* model */ - __u8 x86_mask; /* stepping */ + __u8 x86_stepping; /* stepping */ };

enum { @@ -277,7 +277,7 @@ static int centrino_verify_cpu_id(const { if ((c->x86 == x->x86) && (c->x86_model == x->x86_model) && - (c->x86_mask == x->x86_mask)) + (c->x86_stepping == x->x86_stepping)) return 1; return 0; } --- a/drivers/cpufreq/speedstep-lib.c +++ b/drivers/cpufreq/speedstep-lib.c @@ -272,9 +272,9 @@ unsigned int speedstep_detect_processor( ebx = cpuid_ebx(0x00000001); ebx &= 0x000000FF;

- pr_debug("ebx value is %x, x86_mask is %x\n", ebx, c->x86_mask); + pr_debug("ebx value is %x, x86_stepping is %x\n", ebx, c->x86_stepping);

- switch (c->x86_mask) { + switch (c->x86_stepping) { case 4: /* * B-stepping [M-P4-M] @@ -361,7 +361,7 @@ unsigned int speedstep_detect_processor( msr_lo, msr_hi); if ((msr_hi & (1<<18)) && (relaxed_check ? 1 : (msr_hi & (3<<24)))) { - if (c->x86_mask == 0x01) { + if (c->x86_stepping == 0x01) { pr_debug("early PIII version\n"); return SPEEDSTEP_CPU_PIII_C_EARLY; } else --- a/drivers/crypto/padlock-aes.c +++ b/drivers/crypto/padlock-aes.c @@ -512,7 +512,7 @@ static int __init padlock_init(void)

printk(KERN_NOTICE PFX "Using VIA PadLock ACE for AES algorithm.\n");

- if (c->x86 == 6 && c->x86_model == 15 && c->x86_mask == 2) { + if (c->x86 == 6 && c->x86_model == 15 && c->x86_stepping == 2) { ecb_fetch_blocks = MAX_ECB_FETCH_BLOCKS; cbc_fetch_blocks = MAX_CBC_FETCH_BLOCKS; printk(KERN_NOTICE PFX "VIA Nano stepping 2 detected: enabling workaround.\n"); --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -3147,7 +3147,7 @@ static struct amd64_family_type *per_fam struct amd64_family_type *fam_type = NULL;

pvt->ext_model = boot_cpu_data.x86_model >> 4; - pvt->stepping = boot_cpu_data.x86_mask; + pvt->stepping = boot_cpu_data.x86_stepping; pvt->model = boot_cpu_data.x86_model; pvt->fam = boot_cpu_data.x86;

--- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -268,13 +268,13 @@ static int adjust_tjmax(struct cpuinfo_x for (i = 0; i < ARRAY_SIZE(tjmax_model_table); i++) { const struct tjmax_model *tm = &tjmax_model_table[i]; if (c->x86_model == tm->model && - (tm->mask == ANY || c->x86_mask == tm->mask)) + (tm->mask == ANY || c->x86_stepping == tm->mask)) return tm->tjmax; }

/* Early chips have no MSR for TjMax */

- if (c->x86_model == 0xf && c->x86_mask < 4) + if (c->x86_model == 0xf && c->x86_stepping < 4) usemsr_ee = 0;

if (c->x86_model > 0xe && usemsr_ee) { @@ -425,7 +425,7 @@ static int chk_ucode_version(unsigned in * Readings might stop update when processor visited too deep sleep, * fixed for stepping D0 (6EC). */ - if (c->x86_model == 0xe && c->x86_mask < 0xc && c->microcode < 0x39) { + if (c->x86_model == 0xe && c->x86_stepping < 0xc && c->microcode < 0x39) { pr_err("Errata AE18 not fixed, update BIOS or microcode of the CPU!\n"); return -ENODEV; } --- a/drivers/hwmon/hwmon-vid.c +++ b/drivers/hwmon/hwmon-vid.c @@ -293,7 +293,7 @@ u8 vid_which_vrm(void) if (c->x86 < 6) /* Any CPU with family lower than 6 */ return 0; /* doesn't have VID */

- vrm_ret = find_vrm(c->x86, c->x86_model, c->x86_mask, c->x86_vendor); + vrm_ret = find_vrm(c->x86, c->x86_model, c->x86_stepping, c->x86_vendor); if (vrm_ret == 134) vrm_ret = get_via_model_d_vrm(); if (vrm_ret == 0) --- a/drivers/hwmon/k10temp.c +++ b/drivers/hwmon/k10temp.c @@ -179,7 +179,7 @@ static bool has_erratum_319(struct pci_d * and AM3 formats, but that's the best we can do. */ return boot_cpu_data.x86_model < 4 || - (boot_cpu_data.x86_model == 4 && boot_cpu_data.x86_mask <= 2); + (boot_cpu_data.x86_model == 4 && boot_cpu_data.x86_stepping <= 2); }

static int k10temp_probe(struct pci_dev *pdev, --- a/drivers/hwmon/k8temp.c +++ b/drivers/hwmon/k8temp.c @@ -187,7 +187,7 @@ static int k8temp_probe(struct pci_dev * return -ENOMEM;

model = boot_cpu_data.x86_model; - stepping = boot_cpu_data.x86_mask; + stepping = boot_cpu_data.x86_stepping;

/* feature available since SH-C0, exclude older revisions */ if ((model == 4 && stepping == 0) || --- a/drivers/video/fbdev/geode/video_gx.c +++ b/drivers/video/fbdev/geode/video_gx.c @@ -127,7 +127,7 @@ void gx_set_dclk_frequency(struct fb_inf int timeout = 1000;

/* Rev. 1 Geode GXs use a 14 MHz reference clock instead of 48 MHz. */ - if (cpu_data(0).x86_mask == 1) { + if (cpu_data(0).x86_stepping == 1) { pll_table = gx_pll_table_14MHz; pll_table_len = ARRAY_SIZE(gx_pll_table_14MHz); } else {

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Gustavo A. R. Silva garsilva@embeddedor.com

commit 24dbc6000f4b9b0ef5a9daecb161f1907733765a upstream.

Currently, x86_cache_size is of type int, which makes no sense as we will never have a valid cache size equal or less than 0. So instead of initializing this variable to -1, it can perfectly be initialized to 0 and use it as an unsigned variable instead.

Suggested-by: Thomas Gleixner tglx@linutronix.de Signed-off-by: Gustavo A. R. Silva garsilva@embeddedor.com Cc: Borislav Petkov bp@alien8.de Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Addresses-Coverity-ID: 1464429 Link: http://lkml.kernel.org/r/20180213192208.GA26414@embeddedor.com Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/include/asm/processor.h | 2 +- arch/x86/kernel/cpu/common.c | 2 +- arch/x86/kernel/cpu/microcode/intel.c | 2 +- arch/x86/kernel/cpu/proc.c | 4 ++-- 4 files changed, 5 insertions(+), 5 deletions(-)

--- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -109,7 +109,7 @@ struct cpuinfo_x86 { char x86_vendor_id[16]; char x86_model_id[64]; /* in KB - valid for CPUS which support this call: */ - int x86_cache_size; + unsigned int x86_cache_size; int x86_cache_alignment; /* In bytes */ /* Cache QoS architectural values: */ int x86_cache_max_rmid; /* max index */ --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1160,7 +1160,7 @@ static void identify_cpu(struct cpuinfo_ int i;

c->loops_per_jiffy = loops_per_jiffy; - c->x86_cache_size = -1; + c->x86_cache_size = 0; c->x86_vendor = X86_VENDOR_UNKNOWN; c->x86_model = c->x86_stepping = 0; /* So far unknown... */ c->x86_vendor_id[0] = '\0'; /* Unset */ --- a/arch/x86/kernel/cpu/microcode/intel.c +++ b/arch/x86/kernel/cpu/microcode/intel.c @@ -982,7 +982,7 @@ static struct microcode_ops microcode_in

static int __init calc_llc_size_per_core(struct cpuinfo_x86 *c) { - u64 llc_size = c->x86_cache_size * 1024; + u64 llc_size = c->x86_cache_size * 1024ULL;

do_div(llc_size, c->x86_max_cores);

--- a/arch/x86/kernel/cpu/proc.c +++ b/arch/x86/kernel/cpu/proc.c @@ -91,8 +91,8 @@ static int show_cpuinfo(struct seq_file }

/* Cache size */ - if (c->x86_cache_size >= 0) - seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); + if (c->x86_cache_size) + seq_printf(m, "cache size\t: %u KB\n", c->x86_cache_size);

show_cpuinfo_core(m, c, cpu); show_cpuinfo_misc(m, c);

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Ray Strode rstrode@redhat.com

commit 16c6db3688734b27487a42d0c2a1062d0b2bad03 upstream.

qxl_cursor_atomic_update allocs a bo for the cursor that it never frees up at the end of the function.

This commit fixes that.

Signed-off-by: Ray Strode rstrode@redhat.com Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie airlied@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/gpu/drm/qxl/qxl_display.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/qxl/qxl_display.c +++ b/drivers/gpu/drm/qxl/qxl_display.c @@ -564,7 +564,7 @@ static void qxl_cursor_atomic_update(str struct qxl_cursor_cmd *cmd; struct qxl_cursor *cursor; struct drm_gem_object *obj; - struct qxl_bo *cursor_bo, *user_bo = NULL; + struct qxl_bo *cursor_bo = NULL, *user_bo = NULL; int ret; void *user_ptr; int size = 64*64*4; @@ -634,6 +634,8 @@ static void qxl_cursor_atomic_update(str qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false); qxl_release_fence_buffer_objects(release);

+ qxl_bo_unref(&cursor_bo); + return;

out_backoff:

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Daniel Vetter daniel.vetter@ffwll.ch

commit 24b8ef699e8221d2b7f813adaab13eec053e1507 upstream.

In the past the ast driver relied upon the fbdev emulation helpers to call ->load_lut at boot-up. But since

commit b8e2b0199cc377617dc238f5106352c06dcd3fa2 Author: Peter Rosin peda@axentia.se Date: Tue Jul 4 12:36:57 2017 +0200

drm/fb-helper: factor out pseudo-palette

that's cleaned up and drivers are expected to boot into a consistent lut state. This patch fixes that.

Fixes: b8e2b0199cc3 ("drm/fb-helper: factor out pseudo-palette") Cc: Peter Rosin peda@axenita.se Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: stable@vger.kernel.org # v4.14+ Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=198123 Cc: Bill Fraser bill.fraser@gmail.com Reported-and-Tested-by: Bill Fraser bill.fraser@gmail.com Signed-off-by: Daniel Vetter daniel.vetter@intel.com Signed-off-by: Dave Airlie airlied@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/gpu/drm/ast/ast_mode.c | 1 + 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/ast/ast_mode.c +++ b/drivers/gpu/drm/ast/ast_mode.c @@ -644,6 +644,7 @@ static void ast_crtc_commit(struct drm_c { struct ast_private *ast = crtc->dev->dev_private; ast_set_index_reg_mask(ast, AST_IO_SEQ_PORT, 0x1, 0xdf, 0); + ast_crtc_load_lut(crtc); }

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Stewart Smith stewart@linux.vnet.ibm.com

commit 5b8b58063029f02da573120ef4dc9079822e3cda upstream.

According to the OPAL docs: skiboot-5.2.5/doc/opal-api/opal-rtc-read-3.txt skiboot-5.2.5/doc/opal-api/opal-rtc-write-4.txt

OPAL_HARDWARE may be returned from OPAL_RTC_READ or OPAL_RTC_WRITE and this indicates either a transient or permanent error.

Prior to this patch, Linux was not dealing with OPAL_HARDWARE being a permanent error particularly well, in that you could end up in a busy loop.

This was not too hard to trigger on an AMI BMC based OpenPOWER machine doing a continuous "ipmitool mc reset cold" to the BMC, the result of that being that we'd get stuck in an infinite loop in opal_get_rtc_time().

We now retry a few times before returning the error higher up the stack.

Fixes: 16b1d26e77b1 ("rtc/tpo: Driver to support rtc and wakeup on PowerNV platform") Cc: stable@vger.kernel.org # v3.19+ Signed-off-by: Stewart Smith stewart@linux.vnet.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/rtc/rtc-opal.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)

--- a/drivers/rtc/rtc-opal.c +++ b/drivers/rtc/rtc-opal.c @@ -58,6 +58,7 @@ static void tm_to_opal(struct rtc_time * static int opal_get_rtc_time(struct device *dev, struct rtc_time *tm) { long rc = OPAL_BUSY; + int retries = 10; u32 y_m_d; u64 h_m_s_ms; __be32 __y_m_d; @@ -67,8 +68,11 @@ static int opal_get_rtc_time(struct devi rc = opal_rtc_read(&__y_m_d, &__h_m_s_ms); if (rc == OPAL_BUSY_EVENT) opal_poll_events(NULL); - else + else if (retries-- && (rc == OPAL_HARDWARE + || rc == OPAL_INTERNAL_ERROR)) msleep(10); + else if (rc != OPAL_BUSY && rc != OPAL_BUSY_EVENT) + break; }

if (rc != OPAL_SUCCESS) @@ -84,6 +88,7 @@ static int opal_get_rtc_time(struct devi static int opal_set_rtc_time(struct device *dev, struct rtc_time *tm) { long rc = OPAL_BUSY; + int retries = 10; u32 y_m_d = 0; u64 h_m_s_ms = 0;

@@ -92,8 +97,11 @@ static int opal_set_rtc_time(struct devi rc = opal_rtc_write(y_m_d, h_m_s_ms); if (rc == OPAL_BUSY_EVENT) opal_poll_events(NULL); - else + else if (retries-- && (rc == OPAL_HARDWARE + || rc == OPAL_INTERNAL_ERROR)) msleep(10); + else if (rc != OPAL_BUSY && rc != OPAL_BUSY_EVENT) + break; }

return rc == OPAL_SUCCESS ? 0 : -EIO;

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Phil Elwell phil@raspberrypi.org

commit 118032be389009b07ecb5a03ffe219a89d421def upstream.

The optional DT parameter max-frequency could init the max bus frequency. So take care of this, before setting the max bus frequency.

Fixes: 660fc733bd74 ("mmc: bcm2835: Add new driver for the sdhost controller.") Signed-off-by: Phil Elwell phil@raspberrypi.org Signed-off-by: Stefan Wahren stefan.wahren@i2se.com Cc: stable@vger.kernel.org # 4.12+ Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/mmc/host/bcm2835.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/mmc/host/bcm2835.c +++ b/drivers/mmc/host/bcm2835.c @@ -1265,7 +1265,8 @@ static int bcm2835_add_host(struct bcm28 char pio_limit_string[20]; int ret;

- mmc->f_max = host->max_clk; + if (!mmc->f_max || mmc->f_max > host->max_clk) + mmc->f_max = host->max_clk; mmc->f_min = host->max_clk / SDCDIV_MAX_CDIV;

mmc->max_busy_timeout = ~0 / (mmc->f_max / 1000);

4.14-stable review patch. If anyone has any objections, please let me know.

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From: Sagi Grimberg sagi@grimberg.me

commit 2572cf57d75a7f91835d9a38771e9e76d575d122 upstream.

The consumers of this routine expects the affinity map of of vector index relative to the first completion vector. The upper layers are not aware of internal/private completion vectors that mlx5 allocates for its own usage.

Hence, return the affinity map of vector index relative to the first completion vector.

Fixes: 05e0cc84e00c ("net/mlx5: Fix get vector affinity helper function") Reported-by: Logan Gunthorpe logang@deltatee.com Tested-by: Max Gurtovoy maxg@mellanox.com Reviewed-by: Max Gurtovoy maxg@mellanox.com Cc: stable@vger.kernel.org # v4.15 Signed-off-by: Sagi Grimberg sagi@grimberg.me Signed-off-by: Doug Ledford dledford@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- include/linux/mlx5/driver.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -1201,7 +1201,7 @@ mlx5_get_vector_affinity(struct mlx5_cor int eqn; int err;

- err = mlx5_vector2eqn(dev, vector, &eqn, &irq); + err = mlx5_vector2eqn(dev, MLX5_EQ_VEC_COMP_BASE + vector, &eqn, &irq); if (err) return NULL;

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Harshad Shirwadkar harshads@google.com

commit abbc3f9395c76d554a9ed27d4b1ebfb5d9b0e4ca upstream.

This patch fixes a race between the shutdown path and bio completion handling. In the ext4 direct io path with async io, after submitting a bio to the block layer, if journal starting fails, ext4_direct_IO_write() would bail out pretending that the IO failed. The caller would have had no way of knowing whether or not the IO was successfully submitted. So instead, we return -EIOCBQUEUED in this case. Now, the caller knows that the IO was submitted. The bio completion handler takes care of the error.

Tested: Ran the shutdown xfstest test 461 in loop for over 2 hours across 4 machines resulting in over 400 runs. Verified that the race didn't occur. Usually the race was seen in about 20-30 iterations.

Signed-off-by: Harshad Shirwadkar harshads@google.com Signed-off-by: Theodore Ts'o tytso@mit.edu Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- fs/ext4/inode.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)

--- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3724,10 +3724,18 @@ static ssize_t ext4_direct_IO_write(stru /* Credits for sb + inode write */ handle = ext4_journal_start(inode, EXT4_HT_INODE, 2); if (IS_ERR(handle)) { - /* This is really bad luck. We've written the data - * but cannot extend i_size. Bail out and pretend - * the write failed... */ - ret = PTR_ERR(handle); + /* + * We wrote the data but cannot extend + * i_size. Bail out. In async io case, we do + * not return error here because we have + * already submmitted the corresponding + * bio. Returning error here makes the caller + * think that this IO is done and failed + * resulting in race with bio's completion + * handler. + */ + if (!ret) + ret = PTR_ERR(handle); if (inode->i_nlink) ext4_orphan_del(NULL, inode);

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann arnd@arndb.de

commit af27d9403f5b80685b79c88425086edccecaf711 upstream.

We get a warning about some slow configurations in randconfig kernels:

mm/memory.c:83:2: error: #warning Unfortunate NUMA and NUMA Balancing config, growing page-frame for last_cpupid. [-Werror=cpp]

The warning is reasonable by itself, but gets in the way of randconfig build testing, so I'm hiding it whenever CONFIG_COMPILE_TEST is set.

The warning was added in 2013 in commit 75980e97dacc ("mm: fold page->_last_nid into page->flags where possible").

Cc: stable@vger.kernel.org Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- mm/memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/memory.c +++ b/mm/memory.c @@ -81,7 +81,7 @@

#include "internal.h"

-#ifdef LAST_CPUPID_NOT_IN_PAGE_FLAGS +#if defined(LAST_CPUPID_NOT_IN_PAGE_FLAGS) && !defined(CONFIG_COMPILE_TEST) #warning Unfortunate NUMA and NUMA Balancing config, growing page-frame for last_cpupid. #endif

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Marcin Nowakowski marcin.nowakowski@mips.com

commit 67a3ba25aa955198196f40b76b329b3ab9ad415a upstream.

Commit 73fbc1eba7ff ("MIPS: fix mem=X@Y commandline processing") added a fix to ensure that the memory range between PHYS_OFFSET and low memory address specified by mem= cmdline argument is not later processed by free_all_bootmem. This change was incorrect for systems where the commandline specifies more than 1 mem argument, as it will cause all memory between PHYS_OFFSET and each of the memory offsets to be marked as reserved, which results in parts of the RAM marked as reserved (Creator CI20's u-boot has a default commandline argument 'mem=256M@0x0 mem=768M@0x30000000').

Change the behaviour to ensure that only the range between PHYS_OFFSET and the lowest start address of the memories is marked as protected.

This change also ensures that the range is marked protected even if it's only defined through the devicetree and not only via commandline arguments.

Reported-by: Mathieu Malaterre mathieu.malaterre@gmail.com Signed-off-by: Marcin Nowakowski marcin.nowakowski@mips.com Fixes: 73fbc1eba7ff ("MIPS: fix mem=X@Y commandline processing") Cc: Ralf Baechle ralf@linux-mips.org Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org # v4.11+ Tested-by: Mathieu Malaterre malat@debian.org Patchwork: https://patchwork.linux-mips.org/patch/18562/ Signed-off-by: James Hogan jhogan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/mips/kernel/setup.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)

--- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -374,6 +374,7 @@ static void __init bootmem_init(void) unsigned long reserved_end; unsigned long mapstart = ~0UL; unsigned long bootmap_size; + phys_addr_t ramstart = (phys_addr_t)ULLONG_MAX; bool bootmap_valid = false; int i;

@@ -394,7 +395,8 @@ static void __init bootmem_init(void) max_low_pfn = 0;

/* - * Find the highest page frame number we have available. + * Find the highest page frame number we have available + * and the lowest used RAM address */ for (i = 0; i < boot_mem_map.nr_map; i++) { unsigned long start, end; @@ -406,6 +408,8 @@ static void __init bootmem_init(void) end = PFN_DOWN(boot_mem_map.map[i].addr + boot_mem_map.map[i].size);

+ ramstart = min(ramstart, boot_mem_map.map[i].addr); + #ifndef CONFIG_HIGHMEM /* * Skip highmem here so we get an accurate max_low_pfn if low @@ -435,6 +439,13 @@ static void __init bootmem_init(void) mapstart = max(reserved_end, start); }

+ /* + * Reserve any memory between the start of RAM and PHYS_OFFSET + */ + if (ramstart > PHYS_OFFSET) + add_memory_region(PHYS_OFFSET, ramstart - PHYS_OFFSET, + BOOT_MEM_RESERVED); + if (min_low_pfn >= max_low_pfn) panic("Incorrect memory mapping !!!"); if (min_low_pfn > ARCH_PFN_OFFSET) { @@ -663,9 +674,6 @@ static int __init early_parse_mem(char *

add_memory_region(start, size, BOOT_MEM_RAM);

- if (start && start > PHYS_OFFSET) - add_memory_region(PHYS_OFFSET, start - PHYS_OFFSET, - BOOT_MEM_RESERVED); return 0; } early_param("mem", early_parse_mem);

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Johan Hovold johan@kernel.org

commit eac56aa3bc8af3d9b9850345d0f2da9d83529134 upstream.

Fix child-node lookup during initialisation which was using the wrong OF-helper and ended up searching the whole device tree depth-first starting at the parent rather than just matching on its children.

To make things worse, the parent pci node could end up being prematurely freed as of_find_node_by_name() drops a reference to its first argument. Any matching child interrupt-controller node was also leaked.

Fixes: 0c4ffcfe1fbc ("PCI: keystone: Add TI Keystone PCIe driver") Cc: stable stable@vger.kernel.org # 3.18 Acked-by: Murali Karicheri m-karicheri2@ti.com Signed-off-by: Johan Hovold johan@kernel.org [lorenzo.pieralisi@arm.com: updated commit subject] Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/pci/dwc/pci-keystone.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/pci/dwc/pci-keystone.c +++ b/drivers/pci/dwc/pci-keystone.c @@ -178,7 +178,7 @@ static int ks_pcie_get_irq_controller_in }

/* interrupt controller is in a child node */ - *np_temp = of_find_node_by_name(np_pcie, controller); + *np_temp = of_get_child_by_name(np_pcie, controller); if (!(*np_temp)) { dev_err(dev, "Node for %s is absent\n", controller); return -EINVAL; @@ -187,6 +187,7 @@ static int ks_pcie_get_irq_controller_in temp = of_irq_count(*np_temp); if (!temp) { dev_err(dev, "No IRQ entries in %s\n", controller); + of_node_put(*np_temp); return -EINVAL; }

@@ -204,6 +205,8 @@ static int ks_pcie_get_irq_controller_in break; }

+ of_node_put(*np_temp); + if (temp) { *num_irqs = temp; return 0;

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Nicolas Pitre nicolas.pitre@linaro.org

commit 724ba8b30b044aa0d94b1cd374fc15806cdd6f18 upstream.

When this method is set, the caller expects struct console_font fields to be properly initialized when it returns. Leave it unset otherwise nonsensical (leaked kernel stack) values are returned to user space.

Signed-off-by: Nicolas Pitre nico@linaro.org Cc: stable@vger.kernel.org Signed-off-by: Bartlomiej Zolnierkiewicz b.zolnierkie@samsung.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/video/console/dummycon.c | 1 - 1 file changed, 1 deletion(-)

--- a/drivers/video/console/dummycon.c +++ b/drivers/video/console/dummycon.c @@ -67,7 +67,6 @@ const struct consw dummy_con = { .con_switch = DUMMY, .con_blank = DUMMY, .con_font_set = DUMMY, - .con_font_get = DUMMY, .con_font_default = DUMMY, .con_font_copy = DUMMY, };

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Simon Gaiser simon@invisiblethingslab.com

commit 781198f1f373c3e350dbeb3af04a7d4c81c1b8d7 upstream.

Commit 82616f9599a7 ("xen: remove tests for pvh mode in pure pv paths") removed the check for autotranslation from {set,clear}_foreign_p2m_mapping but those are called by grant-table.c also on PVH/HVM guests.

Cc: stable@vger.kernel.org # 4.14 Fixes: 82616f9599a7 ("xen: remove tests for pvh mode in pure pv paths") Signed-off-by: Simon Gaiser simon@invisiblethingslab.com Reviewed-by: Juergen Gross jgross@suse.com Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/xen/p2m.c | 6 ++++++ 1 file changed, 6 insertions(+)

--- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -694,6 +694,9 @@ int set_foreign_p2m_mapping(struct gntta int i, ret = 0; pte_t *pte;

+ if (xen_feature(XENFEAT_auto_translated_physmap)) + return 0; + if (kmap_ops) { ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, kmap_ops, count); @@ -736,6 +739,9 @@ int clear_foreign_p2m_mapping(struct gnt { int i, ret = 0;

+ if (xen_feature(XENFEAT_auto_translated_physmap)) + return 0; + for (i = 0; i < count; i++) { unsigned long mfn = __pfn_to_mfn(page_to_pfn(pages[i])); unsigned long pfn = page_to_pfn(pages[i]);

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Miklos Szeredi mszeredi@redhat.com

commit cf5eebae2cd28d37581507668605f4d23cd7218d upstream.

When resetting iterator on a zero offset we need to discard any data already in the buffer (count), and private state of the iterator (version).

For example this bug results in first line being repeated in /proc/mounts if doing a zero size read before a non-zero size read.

Reported-by: Rich Felker dalias@libc.org Signed-off-by: Miklos Szeredi mszeredi@redhat.com Fixes: e522751d605d ("seq_file: reset iterator to first record for zero offset") Cc: stable@vger.kernel.org # v4.10 Signed-off-by: Al Viro viro@zeniv.linux.org.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- fs/seq_file.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -181,8 +181,11 @@ ssize_t seq_read(struct file *file, char * if request is to read from zero offset, reset iterator to first * record as it might have been already advanced by previous requests */ - if (*ppos == 0) + if (*ppos == 0) { m->index = 0; + m->version = 0; + m->count = 0; + }

/* Don't assume *ppos is where we left it */ if (unlikely(*ppos != m->read_pos)) {

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dan Williams dan.j.williams@intel.com

commit 3968523f855050b8195134da951b87c20bd66130 upstream.

mpls_label_ok() validates that the 'platform_label' array index from a userspace netlink message payload is valid. Under speculation the mpls_label_ok() result may not resolve in the CPU pipeline until after the index is used to access an array element. Sanitize the index to zero to prevent userspace-controlled arbitrary out-of-bounds speculation, a precursor for a speculative execution side channel vulnerability.

Cc: stable@vger.kernel.org Cc: "David S. Miller" davem@davemloft.net Cc: Eric W. Biederman ebiederm@xmission.com Signed-off-by: Dan Williams dan.j.williams@intel.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- net/mpls/af_mpls.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-)

--- a/net/mpls/af_mpls.c +++ b/net/mpls/af_mpls.c @@ -8,6 +8,7 @@ #include <linux/ipv6.h> #include <linux/mpls.h> #include <linux/netconf.h> +#include <linux/nospec.h> #include <linux/vmalloc.h> #include <linux/percpu.h> #include <net/ip.h> @@ -904,24 +905,27 @@ errout: return err; }

-static bool mpls_label_ok(struct net *net, unsigned int index, +static bool mpls_label_ok(struct net *net, unsigned int *index, struct netlink_ext_ack *extack) { + bool is_ok = true; + /* Reserved labels may not be set */ - if (index < MPLS_LABEL_FIRST_UNRESERVED) { + if (*index < MPLS_LABEL_FIRST_UNRESERVED) { NL_SET_ERR_MSG(extack, "Invalid label - must be MPLS_LABEL_FIRST_UNRESERVED or higher"); - return false; + is_ok = false; }

/* The full 20 bit range may not be supported. */ - if (index >= net->mpls.platform_labels) { + if (is_ok && *index >= net->mpls.platform_labels) { NL_SET_ERR_MSG(extack, "Label >= configured maximum in platform_labels"); - return false; + is_ok = false; }

- return true; + *index = array_index_nospec(*index, net->mpls.platform_labels); + return is_ok; }

static int mpls_route_add(struct mpls_route_config *cfg, @@ -944,7 +948,7 @@ static int mpls_route_add(struct mpls_ro index = find_free_label(net); }

- if (!mpls_label_ok(net, index, extack)) + if (!mpls_label_ok(net, &index, extack)) goto errout;

/* Append makes no sense with mpls */ @@ -1021,7 +1025,7 @@ static int mpls_route_del(struct mpls_ro

index = cfg->rc_label;

- if (!mpls_label_ok(net, index, extack)) + if (!mpls_label_ok(net, &index, extack)) goto errout;

mpls_route_update(net, index, NULL, &cfg->rc_nlinfo); @@ -1779,7 +1783,7 @@ static int rtm_to_route_config(struct sk goto errout;

if (!mpls_label_ok(cfg->rc_nlinfo.nl_net, - cfg->rc_label, extack)) + &cfg->rc_label, extack)) goto errout; break; } @@ -2106,7 +2110,7 @@ static int mpls_getroute(struct sk_buff goto errout; }

- if (!mpls_label_ok(net, in_label, extack)) { + if (!mpls_label_ok(net, &in_label, extack)) { err = -EINVAL; goto errout; }

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Will Deacon will.deacon@arm.com

commit 2ce77f6d8a9ae9ce6d80397d88bdceb84a2004cd upstream.

When KASAN is enabled, the swapper page table contains many identical mappings of the zero page, which can lead to a stall during boot whilst the G -> nG code continually walks the same page table entries looking for global mappings.

This patch sets the nG bit (bit 11, which is IGNORED) in table entries after processing the subtree so we can easily skip them if we see them a second time.

Tested-by: Mark Rutland mark.rutland@arm.com Signed-off-by: Will Deacon will.deacon@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/arm64/mm/proc.S | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)

--- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -190,7 +190,8 @@ ENDPROC(idmap_cpu_replace_ttbr1) dc cvac, cur_()\type()p // Ensure any existing dirty dmb sy // lines are written back before ldr \type, [cur_()\type()p] // loading the entry - tbz \type, #0, next_()\type // Skip invalid entries + tbz \type, #0, skip_()\type // Skip invalid and + tbnz \type, #11, skip_()\type // non-global entries .endm

.macro __idmap_kpti_put_pgtable_ent_ng, type @@ -249,8 +250,9 @@ ENTRY(idmap_kpti_install_ng_mappings) add end_pgdp, cur_pgdp, #(PTRS_PER_PGD * 8) do_pgd: __idmap_kpti_get_pgtable_ent pgd tbnz pgd, #1, walk_puds - __idmap_kpti_put_pgtable_ent_ng pgd next_pgd: + __idmap_kpti_put_pgtable_ent_ng pgd +skip_pgd: add cur_pgdp, cur_pgdp, #8 cmp cur_pgdp, end_pgdp b.ne do_pgd @@ -278,8 +280,9 @@ walk_puds: add end_pudp, cur_pudp, #(PTRS_PER_PUD * 8) do_pud: __idmap_kpti_get_pgtable_ent pud tbnz pud, #1, walk_pmds - __idmap_kpti_put_pgtable_ent_ng pud next_pud: + __idmap_kpti_put_pgtable_ent_ng pud +skip_pud: add cur_pudp, cur_pudp, 8 cmp cur_pudp, end_pudp b.ne do_pud @@ -298,8 +301,9 @@ walk_pmds: add end_pmdp, cur_pmdp, #(PTRS_PER_PMD * 8) do_pmd: __idmap_kpti_get_pgtable_ent pmd tbnz pmd, #1, walk_ptes - __idmap_kpti_put_pgtable_ent_ng pmd next_pmd: + __idmap_kpti_put_pgtable_ent_ng pmd +skip_pmd: add cur_pmdp, cur_pmdp, #8 cmp cur_pmdp, end_pmdp b.ne do_pmd @@ -317,7 +321,7 @@ walk_ptes: add end_ptep, cur_ptep, #(PTRS_PER_PTE * 8) do_pte: __idmap_kpti_get_pgtable_ent pte __idmap_kpti_put_pgtable_ent_ng pte -next_pte: +skip_pte: add cur_ptep, cur_ptep, #8 cmp cur_ptep, end_ptep b.ne do_pte

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Ray Strode rstrode@redhat.com

commit 9428088c90b6f7d5edd2a1b0d742c75339b36f6e upstream.

QXL associates mouse state with its primary plane.

Destroying a primary plane and putting a new one in place has the side effect of destroying the cursor as well.

This commit changes the driver to reapply the cursor any time a new primary is created. It achieves this by keeping a reference to the cursor bo on the qxl_crtc struct.

This fix is very similar to

commit 4532b241a4b7 ("drm/qxl: reapply cursor after SetCrtc calls")

which got implicitly reverted as part of implementing the atomic modeset feature.

Cc: Gerd Hoffmann kraxel@redhat.com Cc: Dave Airlie airlied@redhat.com Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1512097 Fixes: 1277eed5fecb ("drm: qxl: Atomic phase 1: convert cursor to universal plane") Cc: stable@vger.kernel.org Signed-off-by: Ray Strode rstrode@redhat.com Signed-off-by: Dave Airlie airlied@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/gpu/drm/qxl/qxl_display.c | 59 ++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/qxl/qxl_drv.h | 2 + 2 files changed, 61 insertions(+)

--- a/drivers/gpu/drm/qxl/qxl_display.c +++ b/drivers/gpu/drm/qxl/qxl_display.c @@ -289,6 +289,7 @@ static void qxl_crtc_destroy(struct drm_ { struct qxl_crtc *qxl_crtc = to_qxl_crtc(crtc);

+ qxl_bo_unref(&qxl_crtc->cursor_bo); drm_crtc_cleanup(crtc); kfree(qxl_crtc); } @@ -495,6 +496,53 @@ static int qxl_primary_atomic_check(stru return 0; }

+static int qxl_primary_apply_cursor(struct drm_plane *plane) +{ + struct drm_device *dev = plane->dev; + struct qxl_device *qdev = dev->dev_private; + struct drm_framebuffer *fb = plane->state->fb; + struct qxl_crtc *qcrtc = to_qxl_crtc(plane->state->crtc); + struct qxl_cursor_cmd *cmd; + struct qxl_release *release; + int ret = 0; + + if (!qcrtc->cursor_bo) + return 0; + + ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd), + QXL_RELEASE_CURSOR_CMD, + &release, NULL); + if (ret) + return ret; + + ret = qxl_release_list_add(release, qcrtc->cursor_bo); + if (ret) + goto out_free_release; + + ret = qxl_release_reserve_list(release, false); + if (ret) + goto out_free_release; + + cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev, release); + cmd->type = QXL_CURSOR_SET; + cmd->u.set.position.x = plane->state->crtc_x + fb->hot_x; + cmd->u.set.position.y = plane->state->crtc_y + fb->hot_y; + + cmd->u.set.shape = qxl_bo_physical_address(qdev, qcrtc->cursor_bo, 0); + + cmd->u.set.visible = 1; + qxl_release_unmap(qdev, release, &cmd->release_info); + + qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false); + qxl_release_fence_buffer_objects(release); + + return ret; + +out_free_release: + qxl_release_free(qdev, release); + return ret; +} + static void qxl_primary_atomic_update(struct drm_plane *plane, struct drm_plane_state *old_state) { @@ -510,6 +558,7 @@ static void qxl_primary_atomic_update(st .x2 = qfb->base.width, .y2 = qfb->base.height }; + int ret; bool same_shadow = false;

if (old_state->fb) { @@ -531,6 +580,11 @@ static void qxl_primary_atomic_update(st if (!same_shadow) qxl_io_destroy_primary(qdev); bo_old->is_primary = false; + + ret = qxl_primary_apply_cursor(plane); + if (ret) + DRM_ERROR( + "could not set cursor after creating primary"); }

if (!bo->is_primary) { @@ -571,6 +625,7 @@ static void qxl_cursor_atomic_update(str struct drm_device *dev = plane->dev; struct qxl_device *qdev = dev->dev_private; struct drm_framebuffer *fb = plane->state->fb; + struct qxl_crtc *qcrtc = to_qxl_crtc(plane->state->crtc); struct qxl_release *release; struct qxl_cursor_cmd *cmd; struct qxl_cursor *cursor; @@ -628,6 +683,10 @@ static void qxl_cursor_atomic_update(str cmd->u.set.shape = qxl_bo_physical_address(qdev, cursor_bo, 0); cmd->type = QXL_CURSOR_SET; + + qxl_bo_unref(&qcrtc->cursor_bo); + qcrtc->cursor_bo = cursor_bo; + cursor_bo = NULL; } else {

ret = qxl_release_reserve_list(release, true); --- a/drivers/gpu/drm/qxl/qxl_drv.h +++ b/drivers/gpu/drm/qxl/qxl_drv.h @@ -135,6 +135,8 @@ struct qxl_bo_list { struct qxl_crtc { struct drm_crtc base; int index; + + struct qxl_bo *cursor_bo; };

struct qxl_output {

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Chuck Lever chuck.lever@oracle.com

commit e89e8d8fcdc6751e86ccad794b052fe67e6ad619 upstream.

Michal Kalderon reports a BUG that occurs just after device removal:

[ 169.112490] rpcrdma: removing device qedr0 for 192.168.110.146:20049 [ 169.143909] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 [ 169.181837] IP: rpcrdma_dma_unmap_regbuf+0xa/0x60 [rpcrdma]

The RPC/RDMA client transport attempts to allocate some resources on demand. Registered buffers are one such resource. These are allocated (or re-allocated) by xprt_rdma_allocate to hold RPC Call and Reply messages. A hardware resource is associated with each of these buffers, as they can be used for a Send or Receive Work Request.

If a device is removed from under an NFS/RDMA mount, the transport layer is responsible for releasing all hardware resources before the device can be finally unplugged. A BUG results when the NFS mount hasn't yet seen much activity: the transport tries to release resources that haven't yet been allocated.

rpcrdma_free_regbuf() already checks for this case, so just move that check to cover the DEVICE_REMOVAL case as well.

Reported-by: Michal Kalderon Michal.Kalderon@cavium.com Fixes: bebd031866ca ("xprtrdma: Support unplugging an HCA ...") Signed-off-by: Chuck Lever chuck.lever@oracle.com Tested-by: Michal Kalderon Michal.Kalderon@cavium.com Cc: stable@vger.kernel.org # v4.12+ Signed-off-by: Anna Schumaker Anna.Schumaker@Netapp.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- net/sunrpc/xprtrdma/verbs.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -1331,6 +1331,9 @@ __rpcrdma_dma_map_regbuf(struct rpcrdma_ static void rpcrdma_dma_unmap_regbuf(struct rpcrdma_regbuf *rb) { + if (!rb) + return; + if (!rpcrdma_regbuf_is_mapped(rb)) return;

@@ -1346,9 +1349,6 @@ rpcrdma_dma_unmap_regbuf(struct rpcrdma_ void rpcrdma_free_regbuf(struct rpcrdma_regbuf *rb) { - if (!rb) - return; - rpcrdma_dma_unmap_regbuf(rb); kfree(rb); }

4.14-stable review patch. If anyone has any objections, please let me know.

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From: David Disseldorp ddiss@suse.de

commit ce512d79d0466a604793addb6b769d12ee326822 upstream.

If chap_server_compute_md5() fails early, e.g. via CHAP_N mismatch, then crypto_free_shash() is called with a NULL pointer which gets dereferenced in crypto_shash_tfm().

Fixes: 69110e3cedbb ("iscsi-target: Use shash and ahash") Suggested-by: Markus Elfring elfring@users.sourceforge.net Signed-off-by: David Disseldorp ddiss@suse.de Cc: stable@vger.kernel.org # 4.6+ Signed-off-by: Nicholas Bellinger nab@linux-iscsi.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/target/iscsi/iscsi_target_auth.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/target/iscsi/iscsi_target_auth.c +++ b/drivers/target/iscsi/iscsi_target_auth.c @@ -421,7 +421,8 @@ static int chap_server_compute_md5( auth_ret = 0; out: kzfree(desc); - crypto_free_shash(tfm); + if (tfm) + crypto_free_shash(tfm); kfree(challenge); kfree(challenge_binhex); return auth_ret;

4.14-stable review patch. If anyone has any objections, please let me know.

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From: NeilBrown neilb@suse.com

commit 8dd601fa8317243be887458c49f6c29c2f3d719f upstream.

dec_pending() is given an error status (possibly 0) to be recorded against a bio. It can be called several times on the one 'struct dm_io', and it is careful to only assign a non-zero error to io->status. However when it then assigned io->status to bio->bi_status, it is not careful and could overwrite a genuine error status with 0.

This can happen when chained bios are in use. If a bio is chained beneath the bio that this dm_io is handling, the child bio might complete and set bio->bi_status before the dm_io completes.

This has been possible since chained bios were introduced in 3.14, and has become a lot easier to trigger with commit 18a25da84354 ("dm: ensure bio submission follows a depth-first tree walk") as that commit caused dm to start using chained bios itself.

A particular failure mode is that if a bio spans an 'error' target and a working target, the 'error' fragment will complete instantly and set the ->bi_status, and the other fragment will normally complete a little later, and will clear ->bi_status.

The fix is simply to only assign io_error to bio->bi_status when io_error is not zero.

Reported-and-tested-by: Milan Broz gmazyland@gmail.com Cc: stable@vger.kernel.org (v3.14+) Signed-off-by: NeilBrown neilb@suse.com Signed-off-by: Mike Snitzer snitzer@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/md/dm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -815,7 +815,8 @@ static void dec_pending(struct dm_io *io queue_io(md, bio); } else { /* done with normal IO or empty flush */ - bio->bi_status = io_error; + if (io_error) + bio->bi_status = io_error; bio_endio(bio); } }

4.14-stable review patch. If anyone has any objections, please let me know.

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From: Liu Bo bo.li.liu@oracle.com

commit 1846430c24d66e85cc58286b3319c82cd54debb2 upstream.

In cases that the whole fs flips into readonly status due to failures in critical sections, then log tree's blocks are still dirty, and this leads to a crash during umount time, the crash is about use-after-free,

umount -> close_ctree -> stop workers -> iput(btree_inode) -> iput_final -> write_inode_now -> ... -> queue job on stop'd workers

cc: stable@vger.kernel.org v3.12+ Fixes: 681ae50917df ("Btrfs: cleanup reserved space when freeing tree log on error") Signed-off-by: Liu Bo bo.li.liu@oracle.com Reviewed-by: Josef Bacik jbacik@fb.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- fs/btrfs/tree-log.c | 9 +++++++++ 1 file changed, 9 insertions(+)

--- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -2494,6 +2494,9 @@ static noinline int walk_down_log_tree(s clean_tree_block(fs_info, next); btrfs_wait_tree_block_writeback(next); btrfs_tree_unlock(next); + } else { + if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &next->bflags)) + clear_extent_buffer_dirty(next); }

WARN_ON(root_owner != @@ -2574,6 +2577,9 @@ static noinline int walk_up_log_tree(str clean_tree_block(fs_info, next); btrfs_wait_tree_block_writeback(next); btrfs_tree_unlock(next); + } else { + if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &next->bflags)) + clear_extent_buffer_dirty(next); }

WARN_ON(root_owner != BTRFS_TREE_LOG_OBJECTID); @@ -2652,6 +2658,9 @@ static int walk_log_tree(struct btrfs_tr clean_tree_block(fs_info, next); btrfs_wait_tree_block_writeback(next); btrfs_tree_unlock(next); + } else { + if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &next->bflags)) + clear_extent_buffer_dirty(next); }

WARN_ON(log->root_key.objectid !=

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Liu Bo bo.li.liu@oracle.com

commit e8f1bc1493855e32b7a2a019decc3c353d94daf6 upstream.

This regression is introduced in commit 3d48d9810de4 ("btrfs: Handle uninitialised inode eviction").

There are two problems,

a) it is ->destroy_inode() that does the final free on inode, not ->evict_inode(), b) clear_inode() must be called before ->evict_inode() returns.

This could end up hitting BUG_ON(inode->i_state != (I_FREEING | I_CLEAR)); in evict() because I_CLEAR is set in clear_inode().

Fixes: commit 3d48d9810de4 ("btrfs: Handle uninitialised inode eviction") Cc: stable@vger.kernel.org # v4.7-rc6+ Signed-off-by: Liu Bo bo.li.liu@oracle.com Reviewed-by: Nikolay Borisov nborisov@suse.com Reviewed-by: Josef Bacik jbacik@fb.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- fs/btrfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5318,7 +5318,7 @@ void btrfs_evict_inode(struct inode *ino trace_btrfs_inode_evict(inode);

if (!root) { - kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode)); + clear_inode(inode); return; }

4.14-stable review patch. If anyone has any objections, please let me know.

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From: Liu Bo bo.li.liu@oracle.com

commit 900c9981680067573671ecc5cbfa7c5770be3a40 upstream.

The highest objectid, which is assigned to new inode, is decided at the time of initializing fs roots. However, in cases where log replay gets processed, the btree which fs root owns might be changed, so we have to search it again for the highest objectid, otherwise creating new inode would end up with -EEXIST.

cc: stable@vger.kernel.org v4.4-rc6+ Fixes: f32e48e92596 ("Btrfs: Initialize btrfs_root->highest_objectid when loading tree root and subvolume roots") Signed-off-by: Liu Bo bo.li.liu@oracle.com Reviewed-by: Josef Bacik jbacik@fb.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- fs/btrfs/tree-log.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)

--- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -28,6 +28,7 @@ #include "hash.h" #include "compression.h" #include "qgroup.h" +#include "inode-map.h"

/* magic values for the inode_only field in btrfs_log_inode: * @@ -5715,6 +5716,23 @@ again: path); }

+ if (!ret && wc.stage == LOG_WALK_REPLAY_ALL) { + struct btrfs_root *root = wc.replay_dest; + + btrfs_release_path(path); + + /* + * We have just replayed everything, and the highest + * objectid of fs roots probably has changed in case + * some inode_item's got replayed. + * + * root->objectid_mutex is not acquired as log replay + * could only happen during mount. + */ + ret = btrfs_find_highest_objectid(root, + &root->highest_objectid); + } + key.offset = found_key.offset - 1; wc.replay_dest->log_root = NULL; free_extent_buffer(log->node);

4.14-stable review patch. If anyone has any objections, please let me know.

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From: Stefan Agner stefan@agner.ch

commit ea56fb282368ea08c2a313af6b55cb597aec4db1 upstream.

With commit 3cf32d180227 ("mtd: nand: vf610: switch to mtd_ooblayout_ops") the driver started to use the NAND cores default large page ooblayout. However, shortly after commit 6a623e076944 ("mtd: nand: add ooblayout for old hamming layout") changed the default layout to the old hamming layout, which is not what vf610_nfc is using. Specify the default large page layout explicitly.

Fixes: 6a623e076944 ("mtd: nand: add ooblayout for old hamming layout") Cc: stable@vger.kernel.org # v4.12+ Signed-off-by: Stefan Agner stefan@agner.ch Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/mtd/nand/vf610_nfc.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/drivers/mtd/nand/vf610_nfc.c +++ b/drivers/mtd/nand/vf610_nfc.c @@ -752,10 +752,8 @@ static int vf610_nfc_probe(struct platfo if (mtd->oobsize > 64) mtd->oobsize = 64;

- /* - * mtd->ecclayout is not specified here because we're using the - * default large page ECC layout defined in NAND core. - */ + /* Use default large page ECC layout defined in NAND core */ + mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops); if (chip->ecc.strength == 32) { nfc->ecc_mode = ECC_60_BYTE; chip->ecc.bytes = 60;

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Kirill Marinushkin k.marinushkin@gmail.com

commit 447cae58cecd69392b74a4a42cd0ab9cabd816af upstream.

The layout of the UAC2 Control request and response varies depending on the request type. With the current implementation, only the Layout 2 Parameter Block (with the 2-byte sized RANGE attribute) is handled properly. For the Control requests with the 1-byte sized RANGE attribute (Bass Control, Mid Control, Tremble Control), the response is parsed incorrectly.

This commit: * fixes the wLength field value in the request * fixes parsing the range values from the response

Fixes: 23caaf19b11e ("ALSA: usb-mixer: Add support for Audio Class v2.0") Signed-off-by: Kirill Marinushkin k.marinushkin@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- sound/usb/mixer.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-)

--- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -347,17 +347,20 @@ static int get_ctl_value_v2(struct usb_m int validx, int *value_ret) { struct snd_usb_audio *chip = cval->head.mixer->chip; - unsigned char buf[4 + 3 * sizeof(__u32)]; /* enough space for one range */ + /* enough space for one range */ + unsigned char buf[sizeof(__u16) + 3 * sizeof(__u32)]; unsigned char *val; - int idx = 0, ret, size; + int idx = 0, ret, val_size, size; __u8 bRequest;

+ val_size = uac2_ctl_value_size(cval->val_type); + if (request == UAC_GET_CUR) { bRequest = UAC2_CS_CUR; - size = uac2_ctl_value_size(cval->val_type); + size = val_size; } else { bRequest = UAC2_CS_RANGE; - size = sizeof(buf); + size = sizeof(__u16) + 3 * val_size; }

memset(buf, 0, sizeof(buf)); @@ -390,16 +393,17 @@ error: val = buf + sizeof(__u16); break; case UAC_GET_MAX: - val = buf + sizeof(__u16) * 2; + val = buf + sizeof(__u16) + val_size; break; case UAC_GET_RES: - val = buf + sizeof(__u16) * 3; + val = buf + sizeof(__u16) + val_size * 2; break; default: return -EINVAL; }

- *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16))); + *value_ret = convert_signed_value(cval, + snd_usb_combine_bytes(val, val_size));

return 0; }

4.14-stable review patch. If anyone has any objections, please let me know.

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From: Kailang Yang kailang@realtek.com

commit 61fcf8ece9b6b09450250c4ca40cc3b81a96a68d upstream.

Thinkpad Dock device support for ALC298 platform. It need to use SSID for the quirk table. Because IdeaPad also has ALC298 platform. Use verb for the quirk table will confuse.

Signed-off-by: Kailang Yang kailang@realtek.com Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- sound/pci/hda/patch_realtek.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+)

--- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -4827,6 +4827,28 @@ static void alc_fixup_tpt440_dock(struct } }

+static void alc_fixup_tpt470_dock(struct hda_codec *codec, + const struct hda_fixup *fix, int action) +{ + static const struct hda_pintbl pincfgs[] = { + { 0x17, 0x21211010 }, /* dock headphone */ + { 0x19, 0x21a11010 }, /* dock mic */ + { } + }; + struct alc_spec *spec = codec->spec; + + if (action == HDA_FIXUP_ACT_PRE_PROBE) { + spec->parse_flags = HDA_PINCFG_NO_HP_FIXUP; + /* Enable DOCK device */ + snd_hda_codec_write(codec, 0x17, 0, + AC_VERB_SET_CONFIG_DEFAULT_BYTES_3, 0); + /* Enable DOCK device */ + snd_hda_codec_write(codec, 0x19, 0, + AC_VERB_SET_CONFIG_DEFAULT_BYTES_3, 0); + snd_hda_apply_pincfgs(codec, pincfgs); + } +} + static void alc_shutup_dell_xps13(struct hda_codec *codec) { struct alc_spec *spec = codec->spec; @@ -5301,6 +5323,7 @@ enum { ALC700_FIXUP_INTEL_REFERENCE, ALC274_FIXUP_DELL_BIND_DACS, ALC274_FIXUP_DELL_AIO_LINEOUT_VERB, + ALC298_FIXUP_TPT470_DOCK, };

static const struct hda_fixup alc269_fixups[] = { @@ -6126,6 +6149,12 @@ static const struct hda_fixup alc269_fix .chained = true, .chain_id = ALC274_FIXUP_DELL_BIND_DACS }, + [ALC298_FIXUP_TPT470_DOCK] = { + .type = HDA_FIXUP_FUNC, + .v.func = alc_fixup_tpt470_dock, + .chained = true, + .chain_id = ALC293_FIXUP_LENOVO_SPK_NOISE + }, };

static const struct snd_pci_quirk alc269_fixup_tbl[] = { @@ -6307,8 +6336,16 @@ static const struct snd_pci_quirk alc269 SND_PCI_QUIRK(0x17aa, 0x2218, "Thinkpad X1 Carbon 2nd", ALC292_FIXUP_TPT440_DOCK), SND_PCI_QUIRK(0x17aa, 0x2223, "ThinkPad T550", ALC292_FIXUP_TPT440_DOCK), SND_PCI_QUIRK(0x17aa, 0x2226, "ThinkPad X250", ALC292_FIXUP_TPT440_DOCK), + SND_PCI_QUIRK(0x17aa, 0x222d, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), + SND_PCI_QUIRK(0x17aa, 0x222e, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), SND_PCI_QUIRK(0x17aa, 0x2231, "Thinkpad T560", ALC292_FIXUP_TPT460), SND_PCI_QUIRK(0x17aa, 0x2233, "Thinkpad", ALC292_FIXUP_TPT460), + SND_PCI_QUIRK(0x17aa, 0x2245, "Thinkpad T470", ALC298_FIXUP_TPT470_DOCK), + SND_PCI_QUIRK(0x17aa, 0x2246, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), + SND_PCI_QUIRK(0x17aa, 0x2247, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), + SND_PCI_QUIRK(0x17aa, 0x224b, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), + SND_PCI_QUIRK(0x17aa, 0x224c, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), + SND_PCI_QUIRK(0x17aa, 0x224d, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), SND_PCI_QUIRK(0x17aa, 0x30bb, "ThinkCentre AIO", ALC233_FIXUP_LENOVO_LINE2_MIC_HOTKEY), SND_PCI_QUIRK(0x17aa, 0x30e2, "ThinkCentre AIO", ALC233_FIXUP_LENOVO_LINE2_MIC_HOTKEY), SND_PCI_QUIRK(0x17aa, 0x310c, "ThinkCentre Station", ALC294_FIXUP_LENOVO_MIC_LOCATION), @@ -6329,7 +6366,12 @@ static const struct snd_pci_quirk alc269 SND_PCI_QUIRK(0x17aa, 0x5050, "Thinkpad T560p", ALC292_FIXUP_TPT460), SND_PCI_QUIRK(0x17aa, 0x5051, "Thinkpad L460", ALC292_FIXUP_TPT460), SND_PCI_QUIRK(0x17aa, 0x5053, "Thinkpad T460", ALC292_FIXUP_TPT460), + SND_PCI_QUIRK(0x17aa, 0x505d, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), + SND_PCI_QUIRK(0x17aa, 0x505f, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), + SND_PCI_QUIRK(0x17aa, 0x5062, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), SND_PCI_QUIRK(0x17aa, 0x5109, "Thinkpad", ALC269_FIXUP_LIMIT_INT_MIC_BOOST), + SND_PCI_QUIRK(0x17aa, 0x511e, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), + SND_PCI_QUIRK(0x17aa, 0x511f, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), SND_PCI_QUIRK(0x17aa, 0x3bf8, "Quanta FL1", ALC269_FIXUP_PCM_44K), SND_PCI_QUIRK(0x17aa, 0x9e54, "LENOVO NB", ALC269_FIXUP_LENOVO_EAPD), SND_PCI_QUIRK(0x1b7d, 0xa831, "Ordissimo EVE2 ", ALC269VB_FIXUP_ORDISSIMO_EVE2), /* Also known as Malata PC-B1303 */

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Lassi Ylikojola lassi.ylikojola@gmail.com

commit 5e35dc0338d85ccebacf3f77eca1e5dea73155e8 upstream.

Add quirk to ensure a sync endpoint is properly configured. This patch is a fix for same symptoms on Behringer UFX1204 as patch from Albertto Aquirre on Dec 8 2016 for Axe-Fx II.

Signed-off-by: Lassi Ylikojola lassi.ylikojola@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- sound/usb/pcm.c | 9 +++++++++ 1 file changed, 9 insertions(+)

--- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -357,6 +357,15 @@ static int set_sync_ep_implicit_fb_quirk

alts = &iface->altsetting[1]; goto add_sync_ep; + case USB_ID(0x1397, 0x0002): + ep = 0x81; + iface = usb_ifnum_to_if(dev, 1); + + if (!iface || iface->num_altsetting == 0) + return -EINVAL; + + alts = &iface->altsetting[1]; + goto add_sync_ep;

} if (attr == USB_ENDPOINT_SYNC_ASYNC &&

4.14-stable review patch. If anyone has any objections, please let me know.

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From: Mikulas Patocka mpatocka@redhat.com

commit 7ac8ff95f48cbfa609a060fd6a1e361dd62feeb3 upstream.

IPv6 doesn't work on the MacchiatoBIN board. It is caused by broken multicast address filter in the mvpp2 driver.

The driver loads doesn't load any multicast entries if "allmulti" is not set. This condition should be reversed.

The condition !netdev_mc_empty(dev) is useless (because netdev_for_each_mc_addr is nop if the list is empty).

This patch also fixes a possible overflow of the multicast list - if mvpp2_prs_mac_da_accept fails, we set the allmulti flag and retry.

Signed-off-by: Mikulas Patocka mpatocka@redhat.com Cc: stable@vger.kernel.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/net/ethernet/marvell/mvpp2.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/marvell/mvpp2.c +++ b/drivers/net/ethernet/marvell/mvpp2.c @@ -6888,6 +6888,7 @@ static void mvpp2_set_rx_mode(struct net int id = port->id; bool allmulti = dev->flags & IFF_ALLMULTI;

+retry: mvpp2_prs_mac_promisc_set(priv, id, dev->flags & IFF_PROMISC); mvpp2_prs_mac_multi_set(priv, id, MVPP2_PE_MAC_MC_ALL, allmulti); mvpp2_prs_mac_multi_set(priv, id, MVPP2_PE_MAC_MC_IP6, allmulti); @@ -6895,9 +6896,13 @@ static void mvpp2_set_rx_mode(struct net /* Remove all port->id's mcast enries */ mvpp2_prs_mcast_del_all(priv, id);

- if (allmulti && !netdev_mc_empty(dev)) { - netdev_for_each_mc_addr(ha, dev) - mvpp2_prs_mac_da_accept(priv, id, ha->addr, true); + if (!allmulti) { + netdev_for_each_mc_addr(ha, dev) { + if (mvpp2_prs_mac_da_accept(priv, id, ha->addr, true)) { + allmulti = true; + goto retry; + } + } } }

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Tony Luck tony.luck@intel.com

commit fd0e786d9d09024f67bd71ec094b110237dc3840 upstream.

In the following commit:

ce0fa3e56ad2 ("x86/mm, mm/hwpoison: Clear PRESENT bit for kernel 1:1 mappings of poison pages")

... we added code to memory_failure() to unmap the page from the kernel 1:1 virtual address space to avoid speculative access to the page logging additional errors.

But memory_failure() may not always succeed in taking the page offline, especially if the page belongs to the kernel. This can happen if there are too many corrected errors on a page and either mcelog(8) or drivers/ras/cec.c asks to take a page offline.

Since we remove the 1:1 mapping early in memory_failure(), we can end up with the page unmapped, but still in use. On the next access the kernel crashes :-(

There are also various debug paths that call memory_failure() to simulate occurrence of an error. Since there is no actual error in memory, we don't need to map out the page for those cases.

Revert most of the previous attempt and keep the solution local to arch/x86/kernel/cpu/mcheck/mce.c. Unmap the page only when:

1) there is a real error 2) memory_failure() succeeds.

All of this only applies to 64-bit systems. 32-bit kernel doesn't map all of memory into kernel space. It isn't worth adding the code to unmap the piece that is mapped because nobody would run a 32-bit kernel on a machine that has recoverable machine checks.

Signed-off-by: Tony Luck tony.luck@intel.com Cc: Andrew Morton akpm@linux-foundation.org Cc: Andy Lutomirski luto@kernel.org Cc: Borislav Petkov bp@suse.de Cc: Brian Gerst brgerst@gmail.com Cc: Dave dave.hansen@intel.com Cc: Denys Vlasenko dvlasenk@redhat.com Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Naoya Horiguchi n-horiguchi@ah.jp.nec.com Cc: Peter Zijlstra peterz@infradead.org Cc: Robert (Persistent Memory) elliott@hpe.com Cc: Thomas Gleixner tglx@linutronix.de Cc: linux-mm@kvack.org Cc: stable@vger.kernel.org #v4.14 Fixes: ce0fa3e56ad2 ("x86/mm, mm/hwpoison: Clear PRESENT bit for kernel 1:1 mappings of poison pages") Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/include/asm/page_64.h | 4 ---- arch/x86/kernel/cpu/mcheck/mce-internal.h | 15 +++++++++++++++ arch/x86/kernel/cpu/mcheck/mce.c | 17 +++++++++++------ include/linux/mm_inline.h | 6 ------ mm/memory-failure.c | 2 -- 5 files changed, 26 insertions(+), 18 deletions(-)

--- a/arch/x86/include/asm/page_64.h +++ b/arch/x86/include/asm/page_64.h @@ -52,10 +52,6 @@ static inline void clear_page(void *page

void copy_page(void *to, void *from);

-#ifdef CONFIG_X86_MCE -#define arch_unmap_kpfn arch_unmap_kpfn -#endif - #endif /* !__ASSEMBLY__ */

#ifdef CONFIG_X86_VSYSCALL_EMULATION --- a/arch/x86/kernel/cpu/mcheck/mce-internal.h +++ b/arch/x86/kernel/cpu/mcheck/mce-internal.h @@ -115,4 +115,19 @@ static inline void mce_unregister_inject

extern struct mca_config mca_cfg;

+#ifndef CONFIG_X86_64 +/* + * On 32-bit systems it would be difficult to safely unmap a poison page + * from the kernel 1:1 map because there are no non-canonical addresses that + * we can use to refer to the address without risking a speculative access. + * However, this isn't much of an issue because: + * 1) Few unmappable pages are in the 1:1 map. Most are in HIGHMEM which + * are only mapped into the kernel as needed + * 2) Few people would run a 32-bit kernel on a machine that supports + * recoverable errors because they have too much memory to boot 32-bit. + */ +static inline void mce_unmap_kpfn(unsigned long pfn) {} +#define mce_unmap_kpfn mce_unmap_kpfn +#endif + #endif /* __X86_MCE_INTERNAL_H__ */ --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -106,6 +106,10 @@ static struct irq_work mce_irq_work;

static void (*quirk_no_way_out)(int bank, struct mce *m, struct pt_regs *regs);

+#ifndef mce_unmap_kpfn +static void mce_unmap_kpfn(unsigned long pfn); +#endif + /* * CPU/chipset specific EDAC code can register a notifier call here to print * MCE errors in a human-readable form. @@ -582,7 +586,8 @@ static int srao_decode_notifier(struct n

if (mce_usable_address(mce) && (mce->severity == MCE_AO_SEVERITY)) { pfn = mce->addr >> PAGE_SHIFT; - memory_failure(pfn, MCE_VECTOR, 0); + if (memory_failure(pfn, MCE_VECTOR, 0)) + mce_unmap_kpfn(pfn); }

return NOTIFY_OK; @@ -1049,12 +1054,13 @@ static int do_memory_failure(struct mce ret = memory_failure(m->addr >> PAGE_SHIFT, MCE_VECTOR, flags); if (ret) pr_err("Memory error not recovered"); + else + mce_unmap_kpfn(m->addr >> PAGE_SHIFT); return ret; }

-#if defined(arch_unmap_kpfn) && defined(CONFIG_MEMORY_FAILURE) - -void arch_unmap_kpfn(unsigned long pfn) +#ifndef mce_unmap_kpfn +static void mce_unmap_kpfn(unsigned long pfn) { unsigned long decoy_addr;

@@ -1065,7 +1071,7 @@ void arch_unmap_kpfn(unsigned long pfn) * We would like to just call: * set_memory_np((unsigned long)pfn_to_kaddr(pfn), 1); * but doing that would radically increase the odds of a - * speculative access to the posion page because we'd have + * speculative access to the poison page because we'd have * the virtual address of the kernel 1:1 mapping sitting * around in registers. * Instead we get tricky. We create a non-canonical address @@ -1090,7 +1096,6 @@ void arch_unmap_kpfn(unsigned long pfn)

if (set_memory_np(decoy_addr, 1)) pr_warn("Could not invalidate pfn=0x%lx from 1:1 map\n", pfn); - } #endif

--- a/include/linux/mm_inline.h +++ b/include/linux/mm_inline.h @@ -127,10 +127,4 @@ static __always_inline enum lru_list pag

#define lru_to_page(head) (list_entry((head)->prev, struct page, lru))

-#ifdef arch_unmap_kpfn -extern void arch_unmap_kpfn(unsigned long pfn); -#else -static __always_inline void arch_unmap_kpfn(unsigned long pfn) { } -#endif - #endif --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1146,8 +1146,6 @@ int memory_failure(unsigned long pfn, in return 0; }

- arch_unmap_kpfn(pfn); - orig_head = hpage = compound_head(p); num_poisoned_pages_inc();

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann arnd@arndb.de

commit 05e89fb576f580ac95e7a5d00bdb34830b09671a upstream.

It is no longer possible to build BT_HCIUART into the kernel when SERIAL_DEV_BUS is a loadable module, even if none of the SERIAL_DEV_BUS based implementations are selected:

drivers/bluetooth/hci_ldisc.o: In function `hci_uart_set_flow_control': hci_ldisc.c:(.text+0xb40): undefined reference to `serdev_device_set_flow_control' hci_ldisc.c:(.text+0xb5c): undefined reference to `serdev_device_set_tiocm'

This adds a dependency to avoid the broken configuration.

Fixes: 7841d554809b ("Bluetooth: hci_uart_set_flow_control: Fix NULL deref when using serdev") Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Marcel Holtmann marcel@holtmann.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/bluetooth/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -66,6 +66,7 @@ config BT_HCIBTSDIO

config BT_HCIUART tristate "HCI UART driver" + depends on SERIAL_DEV_BUS || !SERIAL_DEV_BUS depends on TTY help Bluetooth HCI UART driver. @@ -80,7 +81,6 @@ config BT_HCIUART config BT_HCIUART_SERDEV bool depends on SERIAL_DEV_BUS && BT_HCIUART - depends on SERIAL_DEV_BUS=y || SERIAL_DEV_BUS=BT_HCIUART default y

config BT_HCIUART_H4

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann arnd@arndb.de

commit 3343647813fdf0f2409fbf5816ee3e0622168079 upstream.

Without this tag, we get a build warning:

WARNING: modpost: missing MODULE_LICENSE() in arch/arm/mach-pxa/tosa-bt.o

For completeness, I'm also adding author and description fields.

Acked-by: Robert Jarzmik robert.jarzmik@free.fr Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/arm/mach-pxa/tosa-bt.c | 4 ++++ 1 file changed, 4 insertions(+)

--- a/arch/arm/mach-pxa/tosa-bt.c +++ b/arch/arm/mach-pxa/tosa-bt.c @@ -132,3 +132,7 @@ static struct platform_driver tosa_bt_dr }, }; module_platform_driver(tosa_bt_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Dmitry Baryshkov"); +MODULE_DESCRIPTION("Bluetooth built-in chip control");

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann arnd@arndb.de

commit 5c1037196b9ee75897c211972de370ed1336ec8f upstream.

The ohci-hcd node has an interrupt number but no interrupt-parent, leading to a warning with current dtc versions:

arch/arm/boot/dts/s5pv210-aquila.dtb: Warning (interrupts_property): Missing interrupt-parent for /soc/ohci@ec300000 arch/arm/boot/dts/s5pv210-goni.dtb: Warning (interrupts_property): Missing interrupt-parent for /soc/ohci@ec300000 arch/arm/boot/dts/s5pv210-smdkc110.dtb: Warning (interrupts_property): Missing interrupt-parent for /soc/ohci@ec300000 arch/arm/boot/dts/s5pv210-smdkv210.dtb: Warning (interrupts_property): Missing interrupt-parent for /soc/ohci@ec300000 arch/arm/boot/dts/s5pv210-torbreck.dtb: Warning (interrupts_property): Missing interrupt-parent for /soc/ohci@ec300000

As seen from the related exynos dts files, the ohci and ehci controllers always share one interrupt number, and the number is the same here as well, so setting the same interrupt-parent is the reasonable solution here.

Reviewed-by: Krzysztof Kozlowski krzk@kernel.org Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/arm/boot/dts/s5pv210.dtsi | 1 + 1 file changed, 1 insertion(+)

--- a/arch/arm/boot/dts/s5pv210.dtsi +++ b/arch/arm/boot/dts/s5pv210.dtsi @@ -463,6 +463,7 @@ compatible = "samsung,exynos4210-ohci"; reg = <0xec300000 0x100>; interrupts = <23>; + interrupt-parent = <&vic1>; clocks = <&clocks CLK_USB_HOST>; clock-names = "usbhost"; #address-cells = <1>;

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Matthias Brugger matthias.bgg@gmail.com

commit ae72e95b5e4ded145bfc6926ad9457b74e3af41a upstream.

The hifsys and ethsys needs the definition of the reset-cells property. Fix this.

Reviewed-by: Rob Herring robh@kernel.org Signed-off-by: Matthias Brugger matthias.bgg@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/arm/boot/dts/mt2701.dtsi | 2 ++ 1 file changed, 2 insertions(+)

--- a/arch/arm/boot/dts/mt2701.dtsi +++ b/arch/arm/boot/dts/mt2701.dtsi @@ -593,6 +593,7 @@ compatible = "mediatek,mt2701-hifsys", "syscon"; reg = <0 0x1a000000 0 0x1000>; #clock-cells = <1>; + #reset-cells = <1>; };

usb0: usb@1a1c0000 { @@ -677,6 +678,7 @@ compatible = "mediatek,mt2701-ethsys", "syscon"; reg = <0 0x1b000000 0 0x1000>; #clock-cells = <1>; + #reset-cells = <1>; };

eth: ethernet@1b100000 {

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann arnd@arndb.de

commit 16c3ada89cff9a8c2a0eea34ffa1aa20af3f6008 upstream.

With CONFIG_KASAN, we get an overly long stack frame due to inlining the register access functions:

drivers/media/tuners/r820t.c: In function 'generic_set_freq.isra.7': drivers/media/tuners/r820t.c:1334:1: error: the frame size of 2880 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]

This is caused by a gcc bug that has now been fixed in gcc-8. To work around the problem, we can pass the register data through a local variable that older gcc versions can optimize out as well.

Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715

Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Mauro Carvalho Chehab mchehab@s-opensource.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/media/tuners/r820t.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)

--- a/drivers/media/tuners/r820t.c +++ b/drivers/media/tuners/r820t.c @@ -396,9 +396,11 @@ static int r820t_write(struct r820t_priv return 0; }

-static int r820t_write_reg(struct r820t_priv *priv, u8 reg, u8 val) +static inline int r820t_write_reg(struct r820t_priv *priv, u8 reg, u8 val) { - return r820t_write(priv, reg, &val, 1); + u8 tmp = val; /* work around GCC PR81715 with asan-stack=1 */ + + return r820t_write(priv, reg, &tmp, 1); }

static int r820t_read_cache_reg(struct r820t_priv *priv, int reg) @@ -411,17 +413,18 @@ static int r820t_read_cache_reg(struct r return -EINVAL; }

-static int r820t_write_reg_mask(struct r820t_priv *priv, u8 reg, u8 val, +static inline int r820t_write_reg_mask(struct r820t_priv *priv, u8 reg, u8 val, u8 bit_mask) { + u8 tmp = val; int rc = r820t_read_cache_reg(priv, reg);

if (rc < 0) return rc;

- val = (rc & ~bit_mask) | (val & bit_mask); + tmp = (rc & ~bit_mask) | (tmp & bit_mask);

- return r820t_write(priv, reg, &val, 1); + return r820t_write(priv, reg, &tmp, 1); }

static int r820t_read(struct r820t_priv *priv, u8 reg, u8 *val, int len)

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: yinbo.zhu yinbo.zhu@nxp.com

commit 97618aca1440b5addc5c3d78659d3e176be23b80 upstream.

The bit eSDHC_TBCTL[TB_EN] couldn't be reset by eSDHC_SYSCTL[RSTA] which is used to reset for all. The driver should make sure it's cleared before card initialization, otherwise the initialization would fail.

Signed-off-by: yinbo.zhu yinbo.zhu@nxp.com Acked-by: Adrian Hunter adrian.hunter@intel.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Cc: Rasmus Villemoes rasmus.villemoes@prevas.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/mmc/host/sdhci-of-esdhc.c | 4 ++++ 1 file changed, 4 insertions(+)

--- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -785,6 +785,10 @@ static void esdhc_init(struct platform_d pltfm_host = sdhci_priv(host); esdhc = sdhci_pltfm_priv(pltfm_host);

+ val = sdhci_readl(host, ESDHC_TBCTL); + val &= ~ESDHC_TB_EN; + sdhci_writel(host, val, ESDHC_TBCTL); + host_ver = sdhci_readw(host, SDHCI_HOST_VERSION); esdhc->vendor_ver = (host_ver & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT;

4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Amir Goldstein amir73il@gmail.com

commit 31747eda41ef3c30c09c5c096b380bf54013746a upstream.

fsnotify pins a watched directory inode in cache, but if directory dentry is released, new lookup will allocate a new dentry and a new inode. Directory events will be notified on the new inode, while fsnotify listener is watching the old pinned inode.

Hash all directory inodes to reuse the pinned inode on lookup. Pure upper dirs are hashes by real upper inode, merge and lower dirs are hashed by real lower inode.

The reference to lower inode was being held by the lower dentry object in the overlay dentry (oe->lowerstack[0]). Releasing the overlay dentry may drop lower inode refcount to zero. Add a refcount on behalf of the overlay inode to prevent that.

As a by-product, hashing directory inodes also detects multiple redirected dirs to the same lower dir and uncovered redirected dir target on and returns -ESTALE on lookup.

The reported issue dates back to initial version of overlayfs, but this patch depends on ovl_inode code that was introduced in kernel v4.13.

Cc: stable@vger.kernel.org #v4.13 Reported-by: Niklas Cassel niklas.cassel@axis.com Signed-off-by: Amir Goldstein amir73il@gmail.com Signed-off-by: Miklos Szeredi mszeredi@redhat.com Tested-by: Niklas Cassel niklas.cassel@axis.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- fs/overlayfs/inode.c | 37 +++++++++++++++++++++++++++---------- fs/overlayfs/super.c | 1 + fs/overlayfs/util.c | 4 ++-- 3 files changed, 30 insertions(+), 12 deletions(-)

--- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -579,6 +579,16 @@ static int ovl_inode_set(struct inode *i static bool ovl_verify_inode(struct inode *inode, struct dentry *lowerdentry, struct dentry *upperdentry) { + if (S_ISDIR(inode->i_mode)) { + /* Real lower dir moved to upper layer under us? */ + if (!lowerdentry && ovl_inode_lower(inode)) + return false; + + /* Lookup of an uncovered redirect origin? */ + if (!upperdentry && ovl_inode_upper(inode)) + return false; + } + /* * Allow non-NULL lower inode in ovl_inode even if lowerdentry is NULL. * This happens when finding a copied up overlay inode for a renamed @@ -606,6 +616,8 @@ struct inode *ovl_get_inode(struct dentr struct inode *inode; /* Already indexed or could be indexed on copy up? */ bool indexed = (index || (ovl_indexdir(dentry->d_sb) && !upperdentry)); + struct dentry *origin = indexed ? lowerdentry : NULL; + bool is_dir;

if (WARN_ON(upperdentry && indexed && !lowerdentry)) return ERR_PTR(-EIO); @@ -614,15 +626,19 @@ struct inode *ovl_get_inode(struct dentr realinode = d_inode(lowerdentry);

/* - * Copy up origin (lower) may exist for non-indexed upper, but we must - * not use lower as hash key in that case. - * Hash inodes that are or could be indexed by origin inode and - * non-indexed upper inodes that could be hard linked by upper inode. + * Copy up origin (lower) may exist for non-indexed non-dir upper, but + * we must not use lower as hash key in that case. + * Hash non-dir that is or could be indexed by origin inode. + * Hash dir that is or could be merged by origin inode. + * Hash pure upper and non-indexed non-dir by upper inode. */ - if (!S_ISDIR(realinode->i_mode) && (upperdentry || indexed)) { - struct inode *key = d_inode(indexed ? lowerdentry : - upperdentry); - unsigned int nlink; + is_dir = S_ISDIR(realinode->i_mode); + if (is_dir) + origin = lowerdentry; + + if (upperdentry || origin) { + struct inode *key = d_inode(origin ?: upperdentry); + unsigned int nlink = is_dir ? 1 : realinode->i_nlink;

inode = iget5_locked(dentry->d_sb, (unsigned long) key, ovl_inode_test, ovl_inode_set, key); @@ -643,8 +659,9 @@ struct inode *ovl_get_inode(struct dentr goto out; }

- nlink = ovl_get_nlink(lowerdentry, upperdentry, - realinode->i_nlink); + /* Recalculate nlink for non-dir due to indexing */ + if (!is_dir) + nlink = ovl_get_nlink(lowerdentry, upperdentry, nlink); set_nlink(inode, nlink); } else { inode = new_inode(dentry->d_sb); --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -200,6 +200,7 @@ static void ovl_destroy_inode(struct ino struct ovl_inode *oi = OVL_I(inode);

dput(oi->__upperdentry); + iput(oi->lower); kfree(oi->redirect); ovl_dir_cache_free(inode); mutex_destroy(&oi->lock); --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -253,7 +253,7 @@ void ovl_inode_init(struct inode *inode, if (upperdentry) OVL_I(inode)->__upperdentry = upperdentry; if (lowerdentry) - OVL_I(inode)->lower = d_inode(lowerdentry); + OVL_I(inode)->lower = igrab(d_inode(lowerdentry));

ovl_copyattr(d_inode(upperdentry ?: lowerdentry), inode); } @@ -269,7 +269,7 @@ void ovl_inode_update(struct inode *inod */ smp_wmb(); OVL_I(inode)->__upperdentry = upperdentry; - if (!S_ISDIR(upperinode->i_mode) && inode_unhashed(inode)) { + if (inode_unhashed(inode)) { inode->i_private = upperinode; __insert_inode_hash(inode, (unsigned long) upperinode); }