- Linux-stable-mirror - lists.linaro.org

[PATCH] hwmon: (max6620) Add locking to avoid TOCTOU

by Gui-Dong Han

The function max6620_read checks shared data (tach and target) for zero before passing it to max6620_fan_tach_to_rpm, which uses it as a divisor. These accesses are currently lockless. If the data changes to zero between the check and the division, it causes a divide-by-zero error. Explicitly acquire the update lock around these checks and calculations to ensure the data remains stable, preventing Time-of-Check to Time-of-Use (TOCTOU) race conditions. This change also aligns the locking behavior with the hwmon_fan_alarm case, which already uses the update lock. Link: https://lore.kernel.org/all/CALbr=LYJ_ehtp53HXEVkSpYoub+XYSTU8Rg=o1xxMJ8=5z… Fixes: e8ac01e5db32 ("hwmon: Add Maxim MAX6620 hardware monitoring driver") Cc: stable(a)vger.kernel.org Signed-off-by: Gui-Dong Han <hanguidong02(a)gmail.com> --- Based on the discussion in the link, I will submit a series of patches to address TOCTOU issues in the hwmon subsystem by converting macros to functions or adjusting locking where appropriate. --- drivers/hwmon/max6620.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/hwmon/max6620.c b/drivers/hwmon/max6620.c index 13201fb755c9..0dce2f5cb61b 100644 --- a/drivers/hwmon/max6620.c +++ b/drivers/hwmon/max6620.c @@ -290,20 +290,24 @@ max6620_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, *val = max6620_fan_div_from_reg(data->fandyn[channel]); break; case hwmon_fan_input: + mutex_lock(&data->update_lock); if (data->tach[channel] == 0) { *val = 0; } else { div = max6620_fan_div_from_reg(data->fandyn[channel]); *val = max6620_fan_tach_to_rpm(div, data->tach[channel]); } + mutex_unlock(&data->update_lock); break; case hwmon_fan_target: + mutex_lock(&data->update_lock); if (data->target[channel] == 0) { *val = 0; } else { div = max6620_fan_div_from_reg(data->fandyn[channel]); *val = max6620_fan_tach_to_rpm(div, data->target[channel]); } + mutex_unlock(&data->update_lock); break; default: return -EOPNOTSUPP; -- 2.43.0

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+ idr-fix-idr_alloc-returning-an-id-out-of-range.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: idr: fix idr_alloc() returning an ID out of range has been added to the -mm mm-hotfixes-unstable branch. Its filename is idr-fix-idr_alloc-returning-an-id-out-of-range.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: "Matthew Wilcox (Oracle)" <willy(a)infradead.org> Subject: idr: fix idr_alloc() returning an ID out of range Date: Fri, 28 Nov 2025 16:18:32 +0000 If you use an IDR with a non-zero base, and specify a range that lies entirely below the base, 'max - base' becomes very large and idr_get_free() can return an ID that lies outside of the requested range. Link: https://lkml.kernel.org/r/20251128161853.3200058-1-willy@infradead.org Fixes: 6ce711f27500 (idr: Make 1-based IDRs more efficient) Signed-off-by: Matthew Wilcox (Oracle) <willy(a)infradead.org> Reported-by: Jan Sokolowski <jan.sokolowski(a)intel.com> Reported-by: Koen Koning koen.koning(a)intel.com Reported-by: Peter Senna Tschudin peter.senna(a)linux.intel.com Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/6449 Reviewed-by: Christian K��nig <christian.koenig(a)amd.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- lib/idr.c | 2 ++ tools/testing/radix-tree/idr-test.c | 21 +++++++++++++++++++++ 2 files changed, 23 insertions(+) --- a/lib/idr.c~idr-fix-idr_alloc-returning-an-id-out-of-range +++ a/lib/idr.c @@ -40,6 +40,8 @@ int idr_alloc_u32(struct idr *idr, void if (WARN_ON_ONCE(!(idr->idr_rt.xa_flags & ROOT_IS_IDR))) idr->idr_rt.xa_flags |= IDR_RT_MARKER; + if (max < base) + return -ENOSPC; id = (id < base) ? 0 : id - base; radix_tree_iter_init(&iter, id); --- a/tools/testing/radix-tree/idr-test.c~idr-fix-idr_alloc-returning-an-id-out-of-range +++ a/tools/testing/radix-tree/idr-test.c @@ -57,6 +57,26 @@ void idr_alloc_test(void) idr_destroy(&idr); } +void idr_alloc2_test(void) +{ + int id; + struct idr idr = IDR_INIT_BASE(idr, 1); + + id = idr_alloc(&idr, idr_alloc2_test, 0, 1, GFP_KERNEL); + assert(id == -ENOSPC); + + id = idr_alloc(&idr, idr_alloc2_test, 1, 2, GFP_KERNEL); + assert(id == 1); + + id = idr_alloc(&idr, idr_alloc2_test, 0, 1, GFP_KERNEL); + assert(id == -ENOSPC); + + id = idr_alloc(&idr, idr_alloc2_test, 0, 2, GFP_KERNEL); + assert(id == -ENOSPC); + + idr_destroy(&idr); +} + void idr_replace_test(void) { DEFINE_IDR(idr); @@ -409,6 +429,7 @@ void idr_checks(void) idr_replace_test(); idr_alloc_test(); + idr_alloc2_test(); idr_null_test(); idr_nowait_test(); idr_get_next_test(0); _ Patches currently in -mm which might be from willy(a)infradead.org are idr-fix-idr_alloc-returning-an-id-out-of-range.patch mm-fix-vma_start_write_killable-signal-handling.patch

1 week, 3 days

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[obsolete] arm64-kernel-initialize-missing-kexec_buf-random-field.patch removed from -mm tree

by Andrew Morton

The quilt patch titled Subject: arm64: kernel: initialize missing kexec_buf->random field has been removed from the -mm tree. Its filename was arm64-kernel-initialize-missing-kexec_buf-random-field.patch This patch was dropped because it is obsolete ------------------------------------------------------ From: Yeoreum Yun <yeoreum.yun(a)arm.com> Subject: arm64: kernel: initialize missing kexec_buf->random field Date: Thu, 27 Nov 2025 18:26:44 +0000 Commit bf454ec31add ("kexec_file: allow to place kexec_buf randomly") introduced the kexec_buf->random field to enable random placement of kexec_buf. However, this field was never properly initialized for kexec images that do not need to be placed randomly, leading to the following UBSAN warning: [ +0.364528] ------------[ cut here ]------------ [ +0.000019] UBSAN: invalid-load in ./include/linux/kexec.h:210:12 [ +0.000131] load of value 2 is not a valid value for type 'bool' (aka '_Bool') [ +0.000003] CPU: 4 UID: 0 PID: 927 Comm: kexec Not tainted 6.18.0-rc7+ #3 PREEMPT(full) [ +0.000002] Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 [ +0.000000] Call trace: [ +0.000001] show_stack+0x24/0x40 (C) [ +0.000006] __dump_stack+0x28/0x48 [ +0.000002] dump_stack_lvl+0x7c/0xb0 [ +0.000002] dump_stack+0x18/0x34 [ +0.000001] ubsan_epilogue+0x10/0x50 [ +0.000002] __ubsan_handle_load_invalid_value+0xc8/0xd0 [ +0.000003] locate_mem_hole_callback+0x28c/0x2a0 [ +0.000003] kexec_locate_mem_hole+0xf4/0x2f0 [ +0.000001] kexec_add_buffer+0xa8/0x178 [ +0.000002] image_load+0xf0/0x258 [ +0.000001] __arm64_sys_kexec_file_load+0x510/0x718 [ +0.000002] invoke_syscall+0x68/0xe8 [ +0.000001] el0_svc_common+0xb0/0xf8 [ +0.000002] do_el0_svc+0x28/0x48 [ +0.000001] el0_svc+0x40/0xe8 [ +0.000002] el0t_64_sync_handler+0x84/0x140 [ +0.000002] el0t_64_sync+0x1bc/0x1c0 To address this, initialise kexec_buf->random field properly. Link: https://lkml.kernel.org/r/20251127182644.1577592-1-yeoreum.yun@arm.com Fixes: bf454ec31add ("kexec_file: allow to place kexec_buf randomly") Signed-off-by: Yeoreum Yun <yeoreum.yun(a)arm.com> Cc: Baoquan He <bhe(a)redhat.com> Cc: Breno Leitao <leitao(a)debian.org> Cc: Catalin Marinas <catalin.marinas(a)arm.com> Cc: Coiby Xu <coxu(a)redhat.com> Cc: levi.yun <yeoreum.yun(a)arm.com> Cc: Will Deacon <will(a)kernel.org> Cc: Jan Pazdziora <jpazdziora(a)redhat.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- arch/arm64/kernel/kexec_image.c | 3 +++ arch/arm64/kernel/machine_kexec_file.c | 6 +++++- 2 files changed, 8 insertions(+), 1 deletion(-) --- a/arch/arm64/kernel/kexec_image.c~arm64-kernel-initialize-missing-kexec_buf-random-field +++ a/arch/arm64/kernel/kexec_image.c @@ -76,6 +76,9 @@ static void *image_load(struct kimage *i kbuf.buf_min = 0; kbuf.buf_max = ULONG_MAX; kbuf.top_down = false; +#ifdef CONFIG_CRASH_DUMP + kbuf.random = false; +#endif kbuf.buffer = kernel; kbuf.bufsz = kernel_len; --- a/arch/arm64/kernel/machine_kexec_file.c~arm64-kernel-initialize-missing-kexec_buf-random-field +++ a/arch/arm64/kernel/machine_kexec_file.c @@ -94,7 +94,11 @@ int load_other_segments(struct kimage *i char *initrd, unsigned long initrd_len, char *cmdline) { - struct kexec_buf kbuf = {}; + struct kexec_buf kbuf = { +#ifdef CONFIG_CRASH_DUMP + .random = false, +#endif + }; void *dtb = NULL; unsigned long initrd_load_addr = 0, dtb_len, orig_segments = image->nr_segments; _ Patches currently in -mm which might be from yeoreum.yun(a)arm.com are

1 week, 3 days

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[PATCH] RDMA/core: Check for the presence of LS_NLA_TYPE_DGID correctly

by Jason Gunthorpe

The netlink response for RDMA_NL_LS_OP_IP_RESOLVE should always have a LS_NLA_TYPE_DGID attribute, it is invalid if it does not. Use the nl parsing logic properly and call nla_parse_deprecated() to fill the nlattrs array and then directly index that array to get the data for the DGID. Just fail if it is NULL. Remove the for loop searching for the nla, and squash the validation and parsing into one function. Fixes an uninitialized read from the stack triggered by userspace if it does not provide the DGID to a kernel initiated RDMA_NL_LS_OP_IP_RESOLVE query. BUG: KMSAN: uninit-value in hex_byte_pack include/linux/hex.h:13 [inline] BUG: KMSAN: uninit-value in ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490 hex_byte_pack include/linux/hex.h:13 [inline] ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490 ip6_addr_string+0x18a/0x3e0 lib/vsprintf.c:1509 ip_addr_string+0x245/0xee0 lib/vsprintf.c:1633 pointer+0xc09/0x1bd0 lib/vsprintf.c:2542 vsnprintf+0xf8a/0x1bd0 lib/vsprintf.c:2930 vprintk_store+0x3ae/0x1530 kernel/printk/printk.c:2279 vprintk_emit+0x307/0xcd0 kernel/printk/printk.c:2426 vprintk_default+0x3f/0x50 kernel/printk/printk.c:2465 vprintk+0x36/0x50 kernel/printk/printk_safe.c:82 _printk+0x17e/0x1b0 kernel/printk/printk.c:2475 ib_nl_process_good_ip_rsep drivers/infiniband/core/addr.c:128 [inline] ib_nl_handle_ip_res_resp+0x963/0x9d0 drivers/infiniband/core/addr.c:141 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0xefa/0x11c0 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0xf04/0x12b0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x10b3/0x1250 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x333/0x3d0 net/socket.c:729 ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2617 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2671 __sys_sendmsg+0x1aa/0x300 net/socket.c:2703 __compat_sys_sendmsg net/compat.c:346 [inline] __do_compat_sys_sendmsg net/compat.c:353 [inline] __se_compat_sys_sendmsg net/compat.c:350 [inline] __ia32_compat_sys_sendmsg+0xa4/0x100 net/compat.c:350 ia32_sys_call+0x3f6c/0x4310 arch/x86/include/generated/asm/syscalls_32.h:371 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:3 Cc: stable(a)vger.kernel.org Fixes: ae43f8286730 ("IB/core: Add IP to GID netlink offload") Reported-by: syzbot+938fcd548c303fe33c1a(a)syzkaller.appspotmail.com Closes: https://lore.kernel.org/r/68dc3dac.a00a0220.102ee.004f.GAE@google.com Signed-off-by: Jason Gunthorpe <jgg(a)nvidia.com> --- drivers/infiniband/core/addr.c | 33 ++++++++++----------------------- 1 file changed, 10 insertions(+), 23 deletions(-) diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c index 61596cda2b65f3..35ba852a172aad 100644 --- a/drivers/infiniband/core/addr.c +++ b/drivers/infiniband/core/addr.c @@ -80,37 +80,25 @@ static const struct nla_policy ib_nl_addr_policy[LS_NLA_TYPE_MAX] = { .min = sizeof(struct rdma_nla_ls_gid)}, }; -static inline bool ib_nl_is_good_ip_resp(const struct nlmsghdr *nlh) +static void ib_nl_process_ip_rsep(const struct nlmsghdr *nlh) { struct nlattr *tb[LS_NLA_TYPE_MAX] = {}; + union ib_gid gid; + struct addr_req *req; + int found = 0; int ret; if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR) - return false; + return; ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), nlmsg_len(nlh), ib_nl_addr_policy, NULL); if (ret) - return false; + return; - return true; -} - -static void ib_nl_process_good_ip_rsep(const struct nlmsghdr *nlh) -{ - const struct nlattr *head, *curr; - union ib_gid gid; - struct addr_req *req; - int len, rem; - int found = 0; - - head = (const struct nlattr *)nlmsg_data(nlh); - len = nlmsg_len(nlh); - - nla_for_each_attr(curr, head, len, rem) { - if (curr->nla_type == LS_NLA_TYPE_DGID) - memcpy(&gid, nla_data(curr), nla_len(curr)); - } + if (!tb[LS_NLA_TYPE_DGID]) + return; + memcpy(&gid, nla_data(tb[LS_NLA_TYPE_DGID]), sizeof(gid)); spin_lock_bh(&lock); list_for_each_entry(req, &req_list, list) { @@ -137,8 +125,7 @@ int ib_nl_handle_ip_res_resp(struct sk_buff *skb, !(NETLINK_CB(skb).sk)) return -EPERM; - if (ib_nl_is_good_ip_resp(nlh)) - ib_nl_process_good_ip_rsep(nlh); + ib_nl_process_ip_rsep(nlh); return 0; } base-commit: 80a85a771deb113cfe2e295fb9e84467a43ebfe4 -- 2.43.0

1 week, 3 days

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[PATCH] hwmon: (max16065) Use local variable to avoid TOCTOU

by Gui-Dong Han

In max16065_current_show, data->curr_sense is read twice: once for the error check and again for the calculation. Since i2c_smbus_read_byte_data returns negative error codes on failure, if the data changes to an error code between the check and the use, ADC_TO_CURR results in an incorrect calculation. Read data->curr_sense into a local variable to ensure consistency. Note that data->curr_gain is constant and safe to access directly. This aligns max16065_current_show with max16065_input_show, which already uses a local variable for the same reason. Link: https://lore.kernel.org/all/CALbr=LYJ_ehtp53HXEVkSpYoub+XYSTU8Rg=o1xxMJ8=5z… Fixes: f5bae2642e3d ("hwmon: Driver for MAX16065 System Manager and compatibles") Cc: stable(a)vger.kernel.org Signed-off-by: Gui-Dong Han <hanguidong02(a)gmail.com> --- Based on the discussion in the link, I will submit a series of patches to address TOCTOU issues in the hwmon subsystem by converting macros to functions or adjusting locking where appropriate. --- drivers/hwmon/max16065.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/hwmon/max16065.c b/drivers/hwmon/max16065.c index 0ccb5eb596fc..4c9e7892a73c 100644 --- a/drivers/hwmon/max16065.c +++ b/drivers/hwmon/max16065.c @@ -216,12 +216,13 @@ static ssize_t max16065_current_show(struct device *dev, struct device_attribute *da, char *buf) { struct max16065_data *data = max16065_update_device(dev); + int curr_sense = data->curr_sense; - if (unlikely(data->curr_sense < 0)) - return data->curr_sense; + if (unlikely(curr_sense < 0)) + return curr_sense; return sysfs_emit(buf, "%d\n", - ADC_TO_CURR(data->curr_sense, data->curr_gain)); + ADC_TO_CURR(curr_sense, data->curr_gain)); } static ssize_t max16065_limit_store(struct device *dev, -- 2.43.0

1 week, 3 days

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[PATCH] idr: Fix idr_alloc() returning an ID out of range

by Matthew Wilcox (Oracle)

If you use an IDR with a non-zero base, and specify a range that lies entirely below the base, 'max - base' becomes very large and idr_get_free() can return an ID that lies outside of the requested range. Reported-by: Jan Sokolowski <jan.sokolowski(a)intel.com> Reported-by: Koen Koning koen.koning(a)intel.com Reported-by: Peter Senna Tschudin peter.senna(a)linux.intel.com Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/6449 Fixes: 6ce711f27500 (idr: Make 1-based IDRs more efficient) Cc: stable(a)vger.kernel.org Signed-off-by: Matthew Wilcox (Oracle) <willy(a)infradead.org> Reviewed-by: Christian König <christian.koenig(a)amd.com> --- lib/idr.c | 2 ++ tools/testing/radix-tree/idr-test.c | 21 +++++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/lib/idr.c b/lib/idr.c index e2adc457abb4..457430cff8c5 100644 --- a/lib/idr.c +++ b/lib/idr.c @@ -40,6 +40,8 @@ int idr_alloc_u32(struct idr *idr, void *ptr, u32 *nextid, if (WARN_ON_ONCE(!(idr->idr_rt.xa_flags & ROOT_IS_IDR))) idr->idr_rt.xa_flags |= IDR_RT_MARKER; + if (max < base) + return -ENOSPC; id = (id < base) ? 0 : id - base; radix_tree_iter_init(&iter, id); diff --git a/tools/testing/radix-tree/idr-test.c b/tools/testing/radix-tree/idr-test.c index 2f830ff8396c..945144e98507 100644 --- a/tools/testing/radix-tree/idr-test.c +++ b/tools/testing/radix-tree/idr-test.c @@ -57,6 +57,26 @@ void idr_alloc_test(void) idr_destroy(&idr); } +void idr_alloc2_test(void) +{ + int id; + struct idr idr = IDR_INIT_BASE(idr, 1); + + id = idr_alloc(&idr, idr_alloc2_test, 0, 1, GFP_KERNEL); + assert(id == -ENOSPC); + + id = idr_alloc(&idr, idr_alloc2_test, 1, 2, GFP_KERNEL); + assert(id == 1); + + id = idr_alloc(&idr, idr_alloc2_test, 0, 1, GFP_KERNEL); + assert(id == -ENOSPC); + + id = idr_alloc(&idr, idr_alloc2_test, 0, 2, GFP_KERNEL); + assert(id == -ENOSPC); + + idr_destroy(&idr); +} + void idr_replace_test(void) { DEFINE_IDR(idr); @@ -409,6 +429,7 @@ void idr_checks(void) idr_replace_test(); idr_alloc_test(); + idr_alloc2_test(); idr_null_test(); idr_nowait_test(); idr_get_next_test(0); -- 2.47.2

1 week, 3 days

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[PATCH 5.15.y 00/14] timers: Provide timer_shutdown[_sync]()

by Jeongjun Park

The "timers: Provide timer_shutdown[_sync]()" patch series implemented a useful feature that addresses various bugs caused by attempts to rearm shutdown timers. https://lore.kernel.org/all/20221123201306.823305113@linutronix.de/ However, this patch series was not fully backported to versions prior to 6.2, requiring separate patches for older kernels if these bugs were encountered. The biggest problem with this is that even if these bugs were discovered and patched in the upstream kernel, if the maintainer or author didn't create a separate backport patch for versions prior to 6.2, the bugs would remain untouched in older kernels. Therefore, to reduce the hassle of having to write a separate patch, we should backport the remaining unbackported commits from the "timers: Provide timer_shutdown[_sync]()" patch series to versions prior to 6.2. --- Documentation/RCU/Design/Requirements/Requirements.rst | 2 +- Documentation/core-api/local_ops.rst | 2 +- Documentation/kernel-hacking/locking.rst | 17 +++++++----- Documentation/timers/hrtimers.rst | 2 +- Documentation/translations/it_IT/kernel-hacking/locking.rst | 14 +++++----- Documentation/translations/zh_CN/core-api/local_ops.rst | 2 +- arch/arm/mach-spear/time.c | 8 +++--- drivers/bluetooth/hci_qca.c | 10 +++++-- drivers/char/tpm/tpm-dev-common.c | 4 +-- drivers/clocksource/arm_arch_timer.c | 12 ++++----- drivers/clocksource/timer-sp804.c | 6 ++--- drivers/staging/wlan-ng/hfa384x_usb.c | 4 +-- drivers/staging/wlan-ng/prism2usb.c | 6 ++--- include/linux/timer.h | 17 ++++++++++-- kernel/time/timer.c | 315 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------------------------------------- net/sunrpc/xprt.c | 2 +- 16 files changed, 322 insertions(+), 101 deletions(-)

1 week, 3 days

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[PATCH 5.10/5.15/6.1] scsi: pm80xx: Set phy->enable_completion only when we

by Nazar Kalashnikov

From: Igor Pylypiv <ipylypiv(a)google.com> [ Upstream commit e4f949ef1516c0d74745ee54a0f4882c1f6c7aea ] pm8001_phy_control() populates the enable_completion pointer with a stack address, sends a PHY_LINK_RESET / PHY_HARD_RESET, waits 300 ms, and returns. The problem arises when a phy control response comes late. After 300 ms the pm8001_phy_control() function returns and the passed enable_completion stack address is no longer valid. Late phy control response invokes complete() on a dangling enable_completion pointer which leads to a kernel crash. Signed-off-by: Igor Pylypiv <ipylypiv(a)google.com> Signed-off-by: Terrence Adams <tadamsjr(a)google.com> Link: https://lore.kernel.org/r/20240627155924.2361370-2-tadamsjr@google.com Acked-by: Jack Wang <jinpu.wang(a)ionos.com> Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> Signed-off-by: Nazar Kalashnikov <sivartiwe(a)gmail.com> --- Backport fix for CVE-2024-47666 drivers/scsi/pm8001/pm8001_sas.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index 765c5be6c84c..85c27f2f990f 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -163,7 +163,6 @@ int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, unsigned long flags; pm8001_ha = sas_phy->ha->lldd_ha; phy = &pm8001_ha->phy[phy_id]; - pm8001_ha->phy[phy_id].enable_completion = &completion; switch (func) { case PHY_FUNC_SET_LINK_RATE: rates = funcdata; @@ -176,6 +175,7 @@ int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, rates->maximum_linkrate; } if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { + pm8001_ha->phy[phy_id].enable_completion = &completion; PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); wait_for_completion(&completion); } @@ -184,6 +184,7 @@ int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, break; case PHY_FUNC_HARD_RESET: if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { + pm8001_ha->phy[phy_id].enable_completion = &completion; PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); wait_for_completion(&completion); } @@ -192,6 +193,7 @@ int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, break; case PHY_FUNC_LINK_RESET: if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { + pm8001_ha->phy[phy_id].enable_completion = &completion; PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); wait_for_completion(&completion); } -- 2.43.0

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[PATCH 5.10] netfilter: nf_set_pipapo: fix initial map fill

by Nazar Kalashnikov

From: Florian Westphal <fw(a)strlen.de> [ Upstream commit 791a615b7ad2258c560f91852be54b0480837c93 ] The initial buffer has to be inited to all-ones, but it must restrict it to the size of the first field, not the total field size. After each round in the map search step, the result and the fill map are swapped, so if we have a set where f->bsize of the first element is smaller than m->bsize_max, those one-bits are leaked into future rounds result map. This makes pipapo find an incorrect matching results for sets where first field size is not the largest. Followup patch adds a test case to nft_concat_range.sh selftest script. Thanks to Stefano Brivio for pointing out that we need to zero out the remainder explicitly, only correcting memset() argument isn't enough. Fixes: 3c4287f62044 ("nf_tables: Add set type for arbitrary concatenation of ranges") Reported-by: Yi Chen <yiche(a)redhat.com> Cc: Stefano Brivio <sbrivio(a)redhat.com> Signed-off-by: Florian Westphal <fw(a)strlen.de> Reviewed-by: Stefano Brivio <sbrivio(a)redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Nazar Kalashnikov <sivartiwe(a)gmail.com> --- Backport fix for CVE-2024-57947 net/netfilter/nft_set_pipapo.c | 4 ++-- net/netfilter/nft_set_pipapo.h | 21 +++++++++++++++++++++ net/netfilter/nft_set_pipapo_avx2.c | 10 ++++++---- 3 files changed, 29 insertions(+), 6 deletions(-) diff --git a/net/netfilter/nft_set_pipapo.c b/net/netfilter/nft_set_pipapo.c index ce617f6a215f..6813ff660b72 100644 --- a/net/netfilter/nft_set_pipapo.c +++ b/net/netfilter/nft_set_pipapo.c @@ -432,7 +432,7 @@ bool nft_pipapo_lookup(const struct net *net, const struct nft_set *set, res_map = scratch->map + (map_index ? m->bsize_max : 0); fill_map = scratch->map + (map_index ? 0 : m->bsize_max); - memset(res_map, 0xff, m->bsize_max * sizeof(*res_map)); + pipapo_resmap_init(m, res_map); nft_pipapo_for_each_field(f, i, m) { bool last = i == m->field_count - 1; @@ -536,7 +536,7 @@ static struct nft_pipapo_elem *pipapo_get(const struct net *net, goto out; } - memset(res_map, 0xff, m->bsize_max * sizeof(*res_map)); + pipapo_resmap_init(m, res_map); nft_pipapo_for_each_field(f, i, m) { bool last = i == m->field_count - 1; diff --git a/net/netfilter/nft_set_pipapo.h b/net/netfilter/nft_set_pipapo.h index 2e709ae01924..8f8f58af4e34 100644 --- a/net/netfilter/nft_set_pipapo.h +++ b/net/netfilter/nft_set_pipapo.h @@ -287,4 +287,25 @@ static u64 pipapo_estimate_size(const struct nft_set_desc *desc) return size; } +/** + * pipapo_resmap_init() - Initialise result map before first use + * @m: Matching data, including mapping table + * @res_map: Result map + * + * Initialize all bits covered by the first field to one, so that after + * the first step, only the matching bits of the first bit group remain. + * + * If other fields have a large bitmap, set remainder of res_map to 0. + */ +static inline void pipapo_resmap_init(const struct nft_pipapo_match *m, unsigned long *res_map) +{ + const struct nft_pipapo_field *f = m->f; + int i; + + for (i = 0; i < f->bsize; i++) + res_map[i] = ULONG_MAX; + + for (i = f->bsize; i < m->bsize_max; i++) + res_map[i] = 0ul; +} #endif /* _NFT_SET_PIPAPO_H */ diff --git a/net/netfilter/nft_set_pipapo_avx2.c b/net/netfilter/nft_set_pipapo_avx2.c index 0a23d297084d..81e6d12ab4cd 100644 --- a/net/netfilter/nft_set_pipapo_avx2.c +++ b/net/netfilter/nft_set_pipapo_avx2.c @@ -1028,6 +1028,7 @@ static int nft_pipapo_avx2_lookup_8b_16(unsigned long *map, unsigned long *fill, /** * nft_pipapo_avx2_lookup_slow() - Fallback function for uncommon field sizes + * @mdata: Matching data, including mapping table * @map: Previous match result, used as initial bitmap * @fill: Destination bitmap to be filled with current match result * @f: Field, containing lookup and mapping tables @@ -1043,7 +1044,8 @@ static int nft_pipapo_avx2_lookup_8b_16(unsigned long *map, unsigned long *fill, * Return: -1 on no match, rule index of match if @last, otherwise first long * word index to be checked next (i.e. first filled word). */ -static int nft_pipapo_avx2_lookup_slow(unsigned long *map, unsigned long *fill, +static int nft_pipapo_avx2_lookup_slow(const struct nft_pipapo_match *mdata, + unsigned long *map, unsigned long *fill, struct nft_pipapo_field *f, int offset, const u8 *pkt, bool first, bool last) { @@ -1053,7 +1055,7 @@ static int nft_pipapo_avx2_lookup_slow(unsigned long *map, unsigned long *fill, lt += offset * NFT_PIPAPO_LONGS_PER_M256; if (first) - memset(map, 0xff, bsize * sizeof(*map)); + pipapo_resmap_init(mdata, map); for (i = offset; i < bsize; i++) { if (f->bb == 8) @@ -1181,7 +1183,7 @@ bool nft_pipapo_avx2_lookup(const struct net *net, const struct nft_set *set, } else if (f->groups == 16) { NFT_SET_PIPAPO_AVX2_LOOKUP(8, 16); } else { - ret = nft_pipapo_avx2_lookup_slow(res, fill, f, + ret = nft_pipapo_avx2_lookup_slow(m, res, fill, f, ret, rp, first, last); } @@ -1197,7 +1199,7 @@ bool nft_pipapo_avx2_lookup(const struct net *net, const struct nft_set *set, } else if (f->groups == 32) { NFT_SET_PIPAPO_AVX2_LOOKUP(4, 32); } else { - ret = nft_pipapo_avx2_lookup_slow(res, fill, f, + ret = nft_pipapo_avx2_lookup_slow(m, res, fill, f, ret, rp, first, last); } -- 2.43.0

1 week, 3 days

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[PATCH 5.10/5.15] Bluetooth: Add more enc key size check

by Nazar Kalashnikov

From: Alex Lu <alex_lu(a)realsil.com.cn> [ Upstream commit 04a342cc49a8522e99c9b3346371c329d841dcd2 ] When we are slave role and receives l2cap conn req when encryption has started, we should check the enc key size to avoid KNOB attack or BLUFFS attack. From SIG recommendation, implementations are advised to reject service-level connections on an encrypted baseband link with key strengths below 7 octets. A simple and clear way to achieve this is to place the enc key size check in hci_cc_read_enc_key_size() The btmon log below shows the case that lacks enc key size check. > HCI Event: Connect Request (0x04) plen 10 Address: BB:22:33:44:55:99 (OUI BB-22-33) Class: 0x480104 Major class: Computer (desktop, notebook, PDA, organizers) Minor class: Desktop workstation Capturing (Scanner, Microphone) Telephony (Cordless telephony, Modem, Headset) Link type: ACL (0x01) < HCI Command: Accept Connection Request (0x01|0x0009) plen 7 Address: BB:22:33:44:55:99 (OUI BB-22-33) Role: Peripheral (0x01) > HCI Event: Command Status (0x0f) plen 4 Accept Connection Request (0x01|0x0009) ncmd 2 Status: Success (0x00) > HCI Event: Connect Complete (0x03) plen 11 Status: Success (0x00) Handle: 1 Address: BB:22:33:44:55:99 (OUI BB-22-33) Link type: ACL (0x01) Encryption: Disabled (0x00) ... > HCI Event: Encryption Change (0x08) plen 4 Status: Success (0x00) Handle: 1 Address: BB:22:33:44:55:99 (OUI BB-22-33) Encryption: Enabled with E0 (0x01) < HCI Command: Read Encryption Key Size (0x05|0x0008) plen 2 Handle: 1 Address: BB:22:33:44:55:99 (OUI BB-22-33) > HCI Event: Command Complete (0x0e) plen 7 Read Encryption Key Size (0x05|0x0008) ncmd 2 Status: Success (0x00) Handle: 1 Address: BB:22:33:44:55:99 (OUI BB-22-33) Key size: 6 // We should check the enc key size ... > ACL Data RX: Handle 1 flags 0x02 dlen 12 L2CAP: Connection Request (0x02) ident 3 len 4 PSM: 25 (0x0019) Source CID: 64 < ACL Data TX: Handle 1 flags 0x00 dlen 16 L2CAP: Connection Response (0x03) ident 3 len 8 Destination CID: 64 Source CID: 64 Result: Connection pending (0x0001) Status: Authorization pending (0x0002) > HCI Event: Number of Completed Packets (0x13) plen 5 Num handles: 1 Handle: 1 Address: BB:22:33:44:55:99 (OUI BB-22-33) Count: 1 #35: len 16 (25 Kb/s) Latency: 5 msec (2-7 msec ~4 msec) < ACL Data TX: Handle 1 flags 0x00 dlen 16 L2CAP: Connection Response (0x03) ident 3 len 8 Destination CID: 64 Source CID: 64 Result: Connection successful (0x0000) Status: No further information available (0x0000) Cc: stable(a)vger.kernel.org Signed-off-by: Alex Lu <alex_lu(a)realsil.com.cn> Signed-off-by: Max Chou <max.chou(a)realtek.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz(a)intel.com> [ Nazar Kalashnikov: change status to rp_status due to function parameter conflict ] Signed-off-by: Nazar Kalashnikov <sivartiwe(a)gmail.com> --- Backport fix for CVE-2023-24023 net/bluetooth/hci_event.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index c6dbb4aebfbc..6310f4f9890e 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -3043,6 +3043,7 @@ static void read_enc_key_size_complete(struct hci_dev *hdev, u8 status, const struct hci_rp_read_enc_key_size *rp; struct hci_conn *conn; u16 handle; + u8 rp_status; BT_DBG("%s status 0x%02x", hdev->name, status); @@ -3052,6 +3053,7 @@ static void read_enc_key_size_complete(struct hci_dev *hdev, u8 status, } rp = (void *)skb->data; + rp_status = rp->status; handle = le16_to_cpu(rp->handle); hci_dev_lock(hdev); @@ -3064,15 +3066,30 @@ static void read_enc_key_size_complete(struct hci_dev *hdev, u8 status, * secure approach is to then assume the key size is 0 to force a * disconnection. */ - if (rp->status) { + if (rp_status) { bt_dev_err(hdev, "failed to read key size for handle %u", handle); conn->enc_key_size = 0; } else { conn->enc_key_size = rp->key_size; + rp_status = 0; + + if (conn->enc_key_size < hdev->min_enc_key_size) { + /* As slave role, the conn->state has been set to + * BT_CONNECTED and l2cap conn req might not be received + * yet, at this moment the l2cap layer almost does + * nothing with the non-zero status. + * So we also clear encrypt related bits, and then the + * handler of l2cap conn req will get the right secure + * state at a later time. + */ + rp_status = HCI_ERROR_AUTH_FAILURE; + clear_bit(HCI_CONN_ENCRYPT, &conn->flags); + clear_bit(HCI_CONN_AES_CCM, &conn->flags); + } } - hci_encrypt_cfm(conn, 0); + hci_encrypt_cfm(conn, rp_status); unlock: hci_dev_unlock(hdev); -- 2.43.0

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