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| author | Oleg Nesterov <oleg@redhat.com> | 2022-07-11 18:16:25 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-07-11 09:52:59 -0700 |
| commit | d5b36a4dbd06c5e8e36ca8ccc552f679069e2946 (patch) | |
| tree | 9c6f81aabf791e0e6bccf60d3882257374cd75f2 /kernel/exit.c | |
| parent | 32346491ddf24599decca06190ebca03ff9de7f8 (diff) | |
| download | linux-d5b36a4dbd06c5e8e36ca8ccc552f679069e2946.tar.gz linux-d5b36a4dbd06c5e8e36ca8ccc552f679069e2946.tar.bz2 linux-d5b36a4dbd06c5e8e36ca8ccc552f679069e2946.zip | |
fix race between exit_itimers() and /proc/pid/timers
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>
Diffstat (limited to 'kernel/exit.c')
| -rw-r--r-- | kernel/exit.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index f072959fcab7..64c938ce36fe 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -766,7 +766,7 @@ void __noreturn do_exit(long code) #ifdef CONFIG_POSIX_TIMERS hrtimer_cancel(&tsk->signal->real_timer); - exit_itimers(tsk->signal); + exit_itimers(tsk); #endif if (tsk->mm) setmax_mm_hiwater_rss(&tsk->signal->maxrss, tsk->mm); |