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| author | Lai Jiangshan <[email protected]> | 2025-01-23 08:25:35 +0000 |
|---|---|---|
| committer | Tejun Heo <[email protected]> | 2025-01-24 19:29:46 +0000 |
| commit | e76946110137703c16423baf6ee177b751a34b7e (patch) | |
| tree | 248ba62e659e43dd8fa322799c97e8e1ea4f817e /net/unix/af_unix.c | |
| parent | Merge tag 'auxdisplay-v6.14-1' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff) | |
| download | kernel-e76946110137703c16423baf6ee177b751a34b7e.tar.gz kernel-e76946110137703c16423baf6ee177b751a34b7e.zip | |
workqueue: Put the pwq after detaching the rescuer from the pool
The commit 68f83057b913("workqueue: Reap workers via kthread_stop() and
remove detach_completion") adds code to reap the normal workers but
mistakenly does not handle the rescuer and also removes the code waiting
for the rescuer in put_unbound_pool(), which caused a use-after-free bug
reported by Cheung Wall.
To avoid the use-after-free bug, the pool’s reference must be held until
the detachment is complete. Therefore, move the code that puts the pwq
after detaching the rescuer from the pool.
Reported-by: cheung wall <[email protected]>
Cc: cheung wall <[email protected]>
Link: https://lore.kernel.org/lkml/CAKHoSAvP3iQW+GwmKzWjEAOoPvzeWeoMO0Gz7Pp3_4kxt-RMoA@mail.gmail.com/
Fixes: 68f83057b913("workqueue: Reap workers via kthread_stop() and remove detach_completion")
Signed-off-by: Lai Jiangshan <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions