fix race between exit_itimers() and /proc/pid/timers

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As Chris explains, the comment above exit_itimers() is not correct,
we can race with proc_timers_seq_ops. Change exit_itimers() to clear
signal->posix_timers with ->siglock held.

Cc: <stable@vger.kernel.org>
Reported-by: chris@accessvector.net
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Oleg Nesterov 2022-07-11 18:16:25 +02:00 • committed by Linus Torvalds

parent 32346491dd

commit d5b36a4dbd

4 changed files with 17 additions and 8 deletions

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include/linux/sched/task.h

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