November 2024 - Linux-stable-mirror

Re: [RFC PATCH] epoll: Add synchronous wakeup support for ep_poll_callback

by Brian Geffon

On Wed, Oct 16, 2024 at 03:10:34PM +0200, Christian Brauner wrote: > On Fri, 26 Apr 2024 16:05:48 +0800, Xuewen Yan wrote: > > Now, the epoll only use wake_up() interface to wake up task. > > However, sometimes, there are epoll users which want to use > > the synchronous wakeup flag to hint the scheduler, such as > > Android binder driver. > > So add a wake_up_sync() define, and use the wake_up_sync() > > when the sync is true in ep_poll_callback(). > > > > [...] > > Applied to the vfs.misc branch of the vfs/vfs.git tree. > Patches in the vfs.misc branch should appear in linux-next soon. > > Please report any outstanding bugs that were missed during review in a > new review to the original patch series allowing us to drop it. > > It's encouraged to provide Acked-bys and Reviewed-bys even though the > patch has now been applied. If possible patch trailers will be updated. > > Note that commit hashes shown below are subject to change due to rebase, > trailer updates or similar. If in doubt, please check the listed branch. > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git > branch: vfs.misc This is a bug that's been present for all of time, so I think we should: Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable(a)vger.kernel.org I sent a patch which adds a benchmark for nonblocking pipes using epoll: https://lore.kernel.org/lkml/20241016190009.866615-1-bgeffon@google.com/ Using this new benchmark I get the following results without this fix and with this fix: $ tools/perf/perf bench sched pipe -n # Running 'sched/pipe' benchmark: # Executed 1000000 pipe operations between two processes Total time: 12.194 [sec] 12.194376 usecs/op 82005 ops/sec $ tools/perf/perf bench sched pipe -n # Running 'sched/pipe' benchmark: # Executed 1000000 pipe operations between two processes Total time: 9.229 [sec] 9.229738 usecs/op 108345 ops/sec > > [1/1] epoll: Add synchronous wakeup support for ep_poll_callback > https://git.kernel.org/vfs/vfs/c/2ce0e17660a7

9 months

2
4
0 0

[PATCH] drm/amdgpu: Make the submission path memory reclaim safe

by Tvrtko Ursulin

From: Tvrtko Ursulin <tvrtko.ursulin(a)igalia.com> As commit 746ae46c1113 ("drm/sched: Mark scheduler work queues with WQ_MEM_RECLAIM") points out, ever since a6149f039369 ("drm/sched: Convert drm scheduler to use a work queue rather than kthread"), any workqueue flushing done from the job submission path must only involve memory reclaim safe workqueues to be safe against reclaim deadlocks. This is also pointed out by workqueue sanity checks: [ ] workqueue: WQ_MEM_RECLAIM sdma0:drm_sched_run_job_work [gpu_sched] is flushing !WQ_MEM_RECLAIM events:amdgpu_device_delay_enable_gfx_off [amdgpu] ... [ ] Workqueue: sdma0 drm_sched_run_job_work [gpu_sched] ... [ ] Call Trace: [ ] <TASK> ... [ ] ? check_flush_dependency+0xf5/0x110 ... [ ] cancel_delayed_work_sync+0x6e/0x80 [ ] amdgpu_gfx_off_ctrl+0xab/0x140 [amdgpu] [ ] amdgpu_ring_alloc+0x40/0x50 [amdgpu] [ ] amdgpu_ib_schedule+0xf4/0x810 [amdgpu] [ ] ? drm_sched_run_job_work+0x22c/0x430 [gpu_sched] [ ] amdgpu_job_run+0xaa/0x1f0 [amdgpu] [ ] drm_sched_run_job_work+0x257/0x430 [gpu_sched] [ ] process_one_work+0x217/0x720 ... [ ] </TASK> Fix this by creating a memory reclaim safe driver workqueue and make the submission path use it. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin(a)igalia.com> References: 746ae46c1113 ("drm/sched: Mark scheduler work queues with WQ_MEM_RECLAIM") Fixes: a6149f039369 ("drm/sched: Convert drm scheduler to use a work queue rather than kthread") Cc: stable(a)vger.kernel.org Cc: Matthew Brost <matthew.brost(a)intel.com> Cc: Danilo Krummrich <dakr(a)kernel.org> Cc: Philipp Stanner <pstanner(a)redhat.com> Cc: Alex Deucher <alexander.deucher(a)amd.com> Cc: Christian König <christian.koenig(a)amd.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 25 +++++++++++++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 5 +++-- 3 files changed, 30 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 7645e498faa4..a6aad687537e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -268,6 +268,8 @@ extern int amdgpu_agp; extern int amdgpu_wbrf; +extern struct workqueue_struct *amdgpu_reclaim_wq; + #define AMDGPU_VM_MAX_NUM_CTX 4096 #define AMDGPU_SG_THRESHOLD (256*1024*1024) #define AMDGPU_WAIT_IDLE_TIMEOUT_IN_MS 3000 diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 38686203bea6..f5b7172e8042 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -255,6 +255,8 @@ struct amdgpu_watchdog_timer amdgpu_watchdog_timer = { .period = 0x0, /* default to 0x0 (timeout disable) */ }; +struct workqueue_struct *amdgpu_reclaim_wq; + /** * DOC: vramlimit (int) * Restrict the total amount of VRAM in MiB for testing. The default is 0 (Use full VRAM). @@ -2971,6 +2973,21 @@ static struct pci_driver amdgpu_kms_pci_driver = { .dev_groups = amdgpu_sysfs_groups, }; +static int amdgpu_wq_init(void) +{ + amdgpu_reclaim_wq = + alloc_workqueue("amdgpu-reclaim", WQ_MEM_RECLAIM, 0); + if (!amdgpu_reclaim_wq) + return -ENOMEM; + + return 0; +} + +static void amdgpu_wq_fini(void) +{ + destroy_workqueue(amdgpu_reclaim_wq); +} + static int __init amdgpu_init(void) { int r; @@ -2978,6 +2995,10 @@ static int __init amdgpu_init(void) if (drm_firmware_drivers_only()) return -EINVAL; + r = amdgpu_wq_init(); + if (r) + goto error_wq; + r = amdgpu_sync_init(); if (r) goto error_sync; @@ -3006,6 +3027,9 @@ static int __init amdgpu_init(void) amdgpu_sync_fini(); error_sync: + amdgpu_wq_fini(); + +error_wq: return r; } @@ -3017,6 +3041,7 @@ static void __exit amdgpu_exit(void) amdgpu_acpi_release(); amdgpu_sync_fini(); amdgpu_fence_slab_fini(); + amdgpu_wq_fini(); mmu_notifier_synchronize(); amdgpu_xcp_drv_release(); } diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c index 2f3f09dfb1fd..f8fd71d9382f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c @@ -790,8 +790,9 @@ void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable) AMD_IP_BLOCK_TYPE_GFX, true)) adev->gfx.gfx_off_state = true; } else { - schedule_delayed_work(&adev->gfx.gfx_off_delay_work, - delay); + queue_delayed_work(amdgpu_reclaim_wq, + &adev->gfx.gfx_off_delay_work, + delay); } } } else { -- 2.46.0

9 months

6
9
0 0

[PATCH stable 6.6 0/8] Fix BPF selftests compilation error

by Shung-Hsi Yu

Currently the BPF selftests in fails to compile (with tools/testing/selftests/bpf/vmtest.sh) due to use of test helpers that were not backported, namely: - netlink_helpers.h - __xlated() The 1st patch in the series adds netlink_helpers.h, and the 8th patch in the series adds the __xlated() helper. Patch 2-7 are pulled as context for the __xlated() helper. Cupertino Miranda (1): selftests/bpf: Support checks against a regular expression Daniel Borkmann (1): selftests/bpf: Add netlink helper library Eduard Zingerman (5): selftests/bpf: extract utility function for BPF disassembly selftests/bpf: print correct offset for pseudo calls in disasm_insn() selftests/bpf: no need to track next_match_pos in struct test_loader selftests/bpf: extract test_loader->expect_msgs as a data structure selftests/bpf: allow checking xlated programs in verifier_* tests Hou Tao (1): selftests/bpf: Factor out get_xlated_program() helper tools/testing/selftests/bpf/Makefile | 20 +- tools/testing/selftests/bpf/disasm_helpers.c | 69 ++++ tools/testing/selftests/bpf/disasm_helpers.h | 12 + tools/testing/selftests/bpf/netlink_helpers.c | 358 ++++++++++++++++++ tools/testing/selftests/bpf/netlink_helpers.h | 46 +++ .../selftests/bpf/prog_tests/ctx_rewrite.c | 118 +----- tools/testing/selftests/bpf/progs/bpf_misc.h | 16 +- tools/testing/selftests/bpf/test_loader.c | 235 +++++++++--- tools/testing/selftests/bpf/test_progs.h | 1 - tools/testing/selftests/bpf/test_verifier.c | 47 +-- tools/testing/selftests/bpf/testing_helpers.c | 43 +++ tools/testing/selftests/bpf/testing_helpers.h | 6 + 12 files changed, 759 insertions(+), 212 deletions(-) create mode 100644 tools/testing/selftests/bpf/disasm_helpers.c create mode 100644 tools/testing/selftests/bpf/disasm_helpers.h create mode 100644 tools/testing/selftests/bpf/netlink_helpers.c create mode 100644 tools/testing/selftests/bpf/netlink_helpers.h -- 2.47.0

9 months

2
11
0 0

[PATCHSET] xfs: bug fixes for 6.13

by Darrick J. Wong

Hi all, Bug fixes for 6.13. If you're going to start using this code, I strongly recommend pulling from my git trees, which are linked below. This has been running on the djcloud for months with no problems. Enjoy! Comments and questions are, as always, welcome. --D kernel git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfs-linux.git/log/?h=xf… xfsprogs git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h… --- Commits in this patchset: * xfs: fix off-by-one error in fsmap's end_daddr usage * xfs: metapath scrubber should use the already loaded inodes * xfs: keep quota directory inode loaded * xfs: return a 64-bit block count from xfs_btree_count_blocks * xfs: don't drop errno values when we fail to ficlone the entire range * xfs: separate healthy clearing mask during repair * xfs: set XFS_SICK_INO_SYMLINK_ZAPPED explicitly when zapping a symlink * xfs: mark metadir repair tempfiles with IRECOVERY * xfs: fix null bno_hint handling in xfs_rtallocate_rtg * xfs: fix error bailout in xfs_rtginode_create * xfs: update btree keys correctly when _insrec splits an inode root block * xfs: fix scrub tracepoints when inode-rooted btrees are involved * xfs: unlock inodes when erroring out of xfs_trans_alloc_dir * xfs: only run precommits once per transaction object * xfs: remove recursion in __xfs_trans_commit * xfs: don't lose solo superblock counter update transactions * xfs: don't lose solo dquot update transactions * xfs: separate dquot buffer reads from xfs_dqflush * xfs: clean up log item accesses in xfs_qm_dqflush{,_done} * xfs: attach dquot buffer to dquot log item buffer * xfs: convert quotacheck to attach dquot buffers --- fs/xfs/libxfs/xfs_btree.c | 33 +++++-- fs/xfs/libxfs/xfs_btree.h | 2 fs/xfs/libxfs/xfs_ialloc_btree.c | 4 + fs/xfs/libxfs/xfs_rtgroup.c | 2 fs/xfs/scrub/agheader.c | 6 + fs/xfs/scrub/agheader_repair.c | 6 + fs/xfs/scrub/fscounters.c | 2 fs/xfs/scrub/health.c | 57 +++++++----- fs/xfs/scrub/ialloc.c | 4 - fs/xfs/scrub/metapath.c | 68 +++++--------- fs/xfs/scrub/refcount.c | 2 fs/xfs/scrub/scrub.h | 6 + fs/xfs/scrub/symlink_repair.c | 3 - fs/xfs/scrub/tempfile.c | 10 ++ fs/xfs/scrub/trace.h | 2 fs/xfs/xfs_bmap_util.c | 2 fs/xfs/xfs_dquot.c | 185 ++++++++++++++++++++++++++++++++------ fs/xfs/xfs_dquot.h | 5 + fs/xfs/xfs_dquot_item.c | 51 ++++++++-- fs/xfs/xfs_dquot_item.h | 7 + fs/xfs/xfs_file.c | 8 ++ fs/xfs/xfs_fsmap.c | 38 +++++--- fs/xfs/xfs_inode.h | 2 fs/xfs/xfs_qm.c | 92 +++++++++++++------ fs/xfs/xfs_qm.h | 1 fs/xfs/xfs_quota.h | 7 + fs/xfs/xfs_rtalloc.c | 2 fs/xfs/xfs_trans.c | 58 ++++++------ fs/xfs/xfs_trans_ail.c | 2 fs/xfs/xfs_trans_dquot.c | 31 +++++- 30 files changed, 475 insertions(+), 223 deletions(-)

9 months

3
25
0 0

FAILED: patch "[PATCH] smb: client: fix UAF in smb2_reconnect_server()" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 24a9799aa8efecd0eb55a75e35f9d8e6400063aa # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040834-magazine-audience-8aa4@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: 24a9799aa8ef ("smb: client: fix UAF in smb2_reconnect_server()") 7257bcf3bdc7 ("cifs: cifs_chan_is_iface_active should be called with chan_lock held") 27e1fd343f80 ("cifs: after disabling multichannel, mark tcon for reconnect") fa1d0508bdd4 ("cifs: account for primary channel in the interface list") a6d8fb54a515 ("cifs: distribute channels across interfaces based on speed") c37ed2d7d098 ("smb: client: remove extra @chan_count check in __cifs_put_smb_ses()") ff7d80a9f271 ("cifs: fix session state transition to avoid use-after-free issue") 38c8a9a52082 ("smb: move client and server files to common directory fs/smb") 943fb67b0902 ("cifs: missing lock when updating session status") bc962159e8e3 ("cifs: avoid race conditions with parallel reconnects") 1bcd548d935a ("cifs: prevent data race in cifs_reconnect_tcon()") e77978de4765 ("cifs: update ip_addr for ses only for primary chan setup") 3c0070f54b31 ("cifs: prevent data race in smb2_reconnect()") 05844bd661d9 ("cifs: print last update time for interface list") 25cf01b7c920 ("cifs: set correct status of tcon ipc when reconnecting") abdb1742a312 ("cifs: get rid of mount options string parsing") 9fd29a5bae6e ("cifs: use fs_context for automounts") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 24a9799aa8efecd0eb55a75e35f9d8e6400063aa Mon Sep 17 00:00:00 2001 From: Paulo Alcantara <pc(a)manguebit.com> Date: Mon, 1 Apr 2024 14:13:10 -0300 Subject: [PATCH] smb: client: fix UAF in smb2_reconnect_server() The UAF bug is due to smb2_reconnect_server() accessing a session that is already being teared down by another thread that is executing __cifs_put_smb_ses(). This can happen when (a) the client has connection to the server but no session or (b) another thread ends up setting @ses->ses_status again to something different than SES_EXITING. To fix this, we need to make sure to unconditionally set @ses->ses_status to SES_EXITING and prevent any other threads from setting a new status while we're still tearing it down. The following can be reproduced by adding some delay to right after the ipc is freed in __cifs_put_smb_ses() - which will give smb2_reconnect_server() worker a chance to run and then accessing @ses->ipc: kinit ... mount.cifs //srv/share /mnt/1 -o sec=krb5,nohandlecache,echo_interval=10 [disconnect srv] ls /mnt/1 &>/dev/null sleep 30 kdestroy [reconnect srv] sleep 10 umount /mnt/1 ... CIFS: VFS: Verify user has a krb5 ticket and keyutils is installed CIFS: VFS: \\srv Send error in SessSetup = -126 CIFS: VFS: Verify user has a krb5 ticket and keyutils is installed CIFS: VFS: \\srv Send error in SessSetup = -126 general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6b6b: 0000 [#1] PREEMPT SMP NOPTI CPU: 3 PID: 50 Comm: kworker/3:1 Not tainted 6.9.0-rc2 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014 Workqueue: cifsiod smb2_reconnect_server [cifs] RIP: 0010:__list_del_entry_valid_or_report+0x33/0xf0 Code: 4f 08 48 85 d2 74 42 48 85 c9 74 59 48 b8 00 01 00 00 00 00 ad de 48 39 c2 74 61 48 b8 22 01 00 00 00 00 74 69 <48> 8b 01 48 39 f8 75 7b 48 8b 72 08 48 39 c6 0f 85 88 00 00 00 b8 RSP: 0018:ffffc900001bfd70 EFLAGS: 00010a83 RAX: dead000000000122 RBX: ffff88810da53838 RCX: 6b6b6b6b6b6b6b6b RDX: 6b6b6b6b6b6b6b6b RSI: ffffffffc02f6878 RDI: ffff88810da53800 RBP: ffff88810da53800 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88810c064000 R13: 0000000000000001 R14: ffff88810c064000 R15: ffff8881039cc000 FS: 0000000000000000(0000) GS:ffff888157c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe3728b1000 CR3: 000000010caa4000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> ? die_addr+0x36/0x90 ? exc_general_protection+0x1c1/0x3f0 ? asm_exc_general_protection+0x26/0x30 ? __list_del_entry_valid_or_report+0x33/0xf0 __cifs_put_smb_ses+0x1ae/0x500 [cifs] smb2_reconnect_server+0x4ed/0x710 [cifs] process_one_work+0x205/0x6b0 worker_thread+0x191/0x360 ? __pfx_worker_thread+0x10/0x10 kthread+0xe2/0x110 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x34/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Cc: stable(a)vger.kernel.org Signed-off-by: Paulo Alcantara (Red Hat) <pc(a)manguebit.com> Signed-off-by: Steve French <stfrench(a)microsoft.com> diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c index 9b85b5341822..ee29bc57300c 100644 --- a/fs/smb/client/connect.c +++ b/fs/smb/client/connect.c @@ -232,7 +232,13 @@ cifs_mark_tcp_ses_conns_for_reconnect(struct TCP_Server_Info *server, spin_lock(&cifs_tcp_ses_lock); list_for_each_entry_safe(ses, nses, &pserver->smb_ses_list, smb_ses_list) { - /* check if iface is still active */ + spin_lock(&ses->ses_lock); + if (ses->ses_status == SES_EXITING) { + spin_unlock(&ses->ses_lock); + continue; + } + spin_unlock(&ses->ses_lock); + spin_lock(&ses->chan_lock); if (cifs_ses_get_chan_index(ses, server) == CIFS_INVAL_CHAN_INDEX) { @@ -1963,31 +1969,6 @@ cifs_setup_ipc(struct cifs_ses *ses, struct smb3_fs_context *ctx) return rc; } -/** - * cifs_free_ipc - helper to release the session IPC tcon - * @ses: smb session to unmount the IPC from - * - * Needs to be called everytime a session is destroyed. - * - * On session close, the IPC is closed and the server must release all tcons of the session. - * No need to send a tree disconnect here. - * - * Besides, it will make the server to not close durable and resilient files on session close, as - * specified in MS-SMB2 3.3.5.6 Receiving an SMB2 LOGOFF Request. - */ -static int -cifs_free_ipc(struct cifs_ses *ses) -{ - struct cifs_tcon *tcon = ses->tcon_ipc; - - if (tcon == NULL) - return 0; - - tconInfoFree(tcon); - ses->tcon_ipc = NULL; - return 0; -} - static struct cifs_ses * cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx) { @@ -2019,48 +2000,52 @@ cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx) void __cifs_put_smb_ses(struct cifs_ses *ses) { struct TCP_Server_Info *server = ses->server; + struct cifs_tcon *tcon; unsigned int xid; size_t i; + bool do_logoff; int rc; - spin_lock(&ses->ses_lock); - if (ses->ses_status == SES_EXITING) { - spin_unlock(&ses->ses_lock); - return; - } - spin_unlock(&ses->ses_lock); - - cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); - cifs_dbg(FYI, - "%s: ses ipc: %s\n", __func__, ses->tcon_ipc ? ses->tcon_ipc->tree_name : "NONE"); - spin_lock(&cifs_tcp_ses_lock); - if (--ses->ses_count > 0) { + spin_lock(&ses->ses_lock); + cifs_dbg(FYI, "%s: id=0x%llx ses_count=%d ses_status=%u ipc=%s\n", + __func__, ses->Suid, ses->ses_count, ses->ses_status, + ses->tcon_ipc ? ses->tcon_ipc->tree_name : "none"); + if (ses->ses_status == SES_EXITING || --ses->ses_count > 0) { + spin_unlock(&ses->ses_lock); spin_unlock(&cifs_tcp_ses_lock); return; } - spin_lock(&ses->ses_lock); - if (ses->ses_status == SES_GOOD) - ses->ses_status = SES_EXITING; - spin_unlock(&ses->ses_lock); - spin_unlock(&cifs_tcp_ses_lock); - /* ses_count can never go negative */ WARN_ON(ses->ses_count < 0); - spin_lock(&ses->ses_lock); - if (ses->ses_status == SES_EXITING && server->ops->logoff) { - spin_unlock(&ses->ses_lock); - cifs_free_ipc(ses); + spin_lock(&ses->chan_lock); + cifs_chan_clear_need_reconnect(ses, server); + spin_unlock(&ses->chan_lock); + + do_logoff = ses->ses_status == SES_GOOD && server->ops->logoff; + ses->ses_status = SES_EXITING; + tcon = ses->tcon_ipc; + ses->tcon_ipc = NULL; + spin_unlock(&ses->ses_lock); + spin_unlock(&cifs_tcp_ses_lock); + + /* + * On session close, the IPC is closed and the server must release all + * tcons of the session. No need to send a tree disconnect here. + * + * Besides, it will make the server to not close durable and resilient + * files on session close, as specified in MS-SMB2 3.3.5.6 Receiving an + * SMB2 LOGOFF Request. + */ + tconInfoFree(tcon); + if (do_logoff) { xid = get_xid(); rc = server->ops->logoff(xid, ses); if (rc) cifs_server_dbg(VFS, "%s: Session Logoff failure rc=%d\n", __func__, rc); _free_xid(xid); - } else { - spin_unlock(&ses->ses_lock); - cifs_free_ipc(ses); } spin_lock(&cifs_tcp_ses_lock);

9 months

6
12
0 0

[PATCH v5 1/6] PCI: dwc: ep: iATU registers must be written after the BAR_MASK

by Niklas Cassel

The DWC Databook description for the LWR_TARGET_RW and LWR_TARGET_HW fields in the IATU_LWR_TARGET_ADDR_OFF_INBOUND_i registers state that: "Field size depends on log2(BAR_MASK+1) in BAR match mode." I.e. only the upper bits are writable, and the number of writable bits is dependent on the configured BAR_MASK. If we do not write the BAR_MASK before writing the iATU registers, we are relying the reset value of the BAR_MASK being larger than the requested size of the first set_bar() call. The reset value of the BAR_MASK is SoC dependent. Thus, if the first set_bar() call requests a size that is larger than the reset value of the BAR_MASK, the iATU will try to write to read-only bits, which will cause the iATU to end up redirecting to a physical address that is different from the address that was intended. Thus, we should always write the iATU registers after writing the BAR_MASK. Cc: stable(a)vger.kernel.org Fixes: f8aed6ec624f ("PCI: dwc: designware: Add EP mode support") Signed-off-by: Niklas Cassel <cassel(a)kernel.org> --- .../pci/controller/dwc/pcie-designware-ep.c | 28 ++++++++++--------- 1 file changed, 15 insertions(+), 13 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index f3ac7d46a855..bad588ef69a4 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -222,19 +222,10 @@ static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, if ((flags & PCI_BASE_ADDRESS_MEM_TYPE_64) && (bar & 1)) return -EINVAL; - reg = PCI_BASE_ADDRESS_0 + (4 * bar); - - if (!(flags & PCI_BASE_ADDRESS_SPACE)) - type = PCIE_ATU_TYPE_MEM; - else - type = PCIE_ATU_TYPE_IO; - - ret = dw_pcie_ep_inbound_atu(ep, func_no, type, epf_bar->phys_addr, bar); - if (ret) - return ret; - if (ep->epf_bar[bar]) - return 0; + goto config_atu; + + reg = PCI_BASE_ADDRESS_0 + (4 * bar); dw_pcie_dbi_ro_wr_en(pci); @@ -246,9 +237,20 @@ static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, dw_pcie_ep_writel_dbi(ep, func_no, reg + 4, 0); } - ep->epf_bar[bar] = epf_bar; dw_pcie_dbi_ro_wr_dis(pci); +config_atu: + if (!(flags & PCI_BASE_ADDRESS_SPACE)) + type = PCIE_ATU_TYPE_MEM; + else + type = PCIE_ATU_TYPE_IO; + + ret = dw_pcie_ep_inbound_atu(ep, func_no, type, epf_bar->phys_addr, bar); + if (ret) + return ret; + + ep->epf_bar[bar] = epf_bar; + return 0; } -- 2.47.0

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Re: [PATCH v5.10.277] wifi: mac80211: Avoid address calculations via out of bounds array indexing

by Greg KH

On Mon, Oct 28, 2024 at 05:00:02PM +0530, Hardik Gohil wrote: > On Mon, Oct 21, 2024 at 3:10 PM Greg KH <gregkh(a)linuxfoundation.org> wrote: > > > > On Sat, Oct 19, 2024 at 11:06:40AM +0530, Hardik Gohil wrote: > > > From: Kenton Groombridge <concord(a)gentoo.org> > > > > > > [ Upstream commit 2663d0462eb32ae7c9b035300ab6b1523886c718 ] > > > > We can't take patches for 5.10 that are not already in 5.15. Please fix > > up and resend for ALL relevent trees. > > > > thanks, > > > > greg k-h > > I have just confirmed those are applicable to v5.15 and v5.10. > > Request to add those patches. Please send tested backports. thanks, greg k-h

9 months

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[PATCH] drm/panel: st7701: Add prepare_prev_first flag to drm_panel

by Marek Vasut

The DSI host must be enabled for the panel to be initialized in prepare(). Set the prepare_prev_first flag to guarantee this. This fixes the panel operation on NXP i.MX8MP SoC / Samsung DSIM DSI host. Fixes: 849b2e3ff969 ("drm/panel: Add Sitronix ST7701 panel driver") Signed-off-by: Marek Vasut <marex(a)denx.de> --- Cc: Chris Morgan <macromorgan(a)hotmail.com> Cc: David Airlie <airlied(a)gmail.com> Cc: Hironori KIKUCHI <kikuchan98(a)gmail.com> Cc: Jagan Teki <jagan(a)amarulasolutions.com> Cc: Jessica Zhang <quic_jesszhan(a)quicinc.com> Cc: Maarten Lankhorst <maarten.lankhorst(a)linux.intel.com> Cc: Maxime Ripard <mripard(a)kernel.org> Cc: Neil Armstrong <neil.armstrong(a)linaro.org> Cc: Simona Vetter <simona(a)ffwll.ch> Cc: Thomas Zimmermann <tzimmermann(a)suse.de> Cc: dri-devel(a)lists.freedesktop.org Cc: stable(a)vger.kernel.org # v6.2+ --- Note that the prepare_prev_first flag was added in Linux 6.2.y commit 5ea6b1702781 ("drm/panel: Add prepare_prev_first flag to drm_panel"), hence the CC stable v6.2+, even if the Fixes tag points to a commit in Linux 5.1.y . --- drivers/gpu/drm/panel/panel-sitronix-st7701.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7701.c b/drivers/gpu/drm/panel/panel-sitronix-st7701.c index eef03d04e0cd2..1f72ef7ca74c9 100644 --- a/drivers/gpu/drm/panel/panel-sitronix-st7701.c +++ b/drivers/gpu/drm/panel/panel-sitronix-st7701.c @@ -1177,6 +1177,7 @@ static int st7701_probe(struct device *dev, int connector_type) return dev_err_probe(dev, ret, "Failed to get orientation\n"); drm_panel_init(&st7701->panel, dev, &st7701_funcs, connector_type); + st7701->panel.prepare_prev_first = true; /** * Once sleep out has been issued, ST7701 IC required to wait 120ms -- 2.45.2

9 months

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[PATCH v2] sched/topology: Enable topology_span_sane check only for debug builds

by Saurabh Sengar

On a x86 system under test with 1780 CPUs, topology_span_sane() takes around 8 seconds cumulatively for all the iterations. It is an expensive operation which does the sanity of non-NUMA topology masks. CPU topology is not something which changes very frequently hence make this check optional for the systems where the topology is trusted and need faster bootup. Restrict this to sched_verbose kernel cmdline option so that this penalty can be avoided for the systems who wants to avoid it. Cc: stable(a)vger.kernel.org Fixes: ccf74128d66c ("sched/topology: Assert non-NUMA topology masks don't (partially) overlap") Signed-off-by: Saurabh Sengar <ssengar(a)linux.microsoft.com> --- [V2] - Use kernel cmdline param instead of compile time flag. kernel/sched/topology.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 9748a4c8d668..4ca63bff321d 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -2363,6 +2363,13 @@ static bool topology_span_sane(struct sched_domain_topology_level *tl, { int i = cpu + 1; + /* Skip the topology sanity check for non-debug, as it is a time-consuming operatin */ + if (!sched_debug_verbose) { + pr_info_once("%s: Skipping topology span sanity check. Use `sched_verbose` boot parameter to enable it.\n", + __func__); + return true; + } + /* NUMA levels are allowed to overlap */ if (tl->flags & SDTL_OVERLAP) return true; -- 2.43.0

9 months

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[PATCH 1/2] arm64: dts: mediatek: mt8183: Disable DPI display output by default

by Chen-Yu Tsai

This reverts commit 377548f05bd0905db52a1d50e5b328b9b4eb049d. Most SoC dtsi files have the display output interfaces disabled by default, and only enabled on boards that utilize them. The MT8183 has it backwards: the display outputs are left enabled by default, and only disabled at the board level. Reverse the situation for the DPI output so that it follows the normal scheme. For ease of backporting the DSI output is handled in a separate patch. Fixes: 009d855a26fd ("arm64: dts: mt8183: add dpi node to mt8183") Fixes: 377548f05bd0 ("arm64: dts: mediatek: mt8183-kukui: Disable DPI display interface") Cc: <stable(a)vger.kernel.org> Signed-off-by: Chen-Yu Tsai <wenst(a)chromium.org> --- arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 5 ----- arch/arm64/boot/dts/mediatek/mt8183.dtsi | 1 + 2 files changed, 1 insertion(+), 5 deletions(-) diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi index 07ae3c8e897b..22924f61ec9e 100644 --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi @@ -290,11 +290,6 @@ dsi_out: endpoint { }; }; -&dpi0 { - /* TODO Re-enable after DP to Type-C port muxing can be described */ - status = "disabled"; -}; - &gic { mediatek,broken-save-restore-fw; }; diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi index 1afeeb1155f5..8f31fc9050ec 100644 --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi @@ -1845,6 +1845,7 @@ dpi0: dpi@14015000 { <&mmsys CLK_MM_DPI_MM>, <&apmixedsys CLK_APMIXED_TVDPLL>; clock-names = "pixel", "engine", "pll"; + status = "disabled"; port { dpi_out: endpoint { }; -- 2.47.0.163.g1226f6d8fa-goog

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