diff options
| author | Oleg Nesterov <oleg@tv-sign.ru> | 2005-06-28 20:44:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-28 21:20:30 -0700 |
| commit | f01b1b0baa454825ed95c28d2a6a71bbf4510836 (patch) | |
| tree | 6a7dda617cdb79933780b841429e67ec7c908d52 /drivers/char/vt_ioctl.c | |
| parent | b36bbb6c3d5244eaf52241ec69f79494137f2db0 (diff) | |
| download | linux-f01b1b0baa454825ed95c28d2a6a71bbf4510836.tar.bz2 | |
[PATCH] ITIMER_REAL: fix possible deadlock and race
As Steven Rostedt pointed out, there are 2 problems with ITIMER_REAL
timers.
1. do_setitimer() does not call del_timer_sync() in case
when the timer is not pending (it_real_value() returns 0).
This is wrong, the timer may still be running, and it can
rearm itself.
2. It calls del_timer_sync() with tsk->sighand->siglock held.
This is deadlockable, because timer's handler needs this
lock too.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char/vt_ioctl.c')
0 files changed, 0 insertions, 0 deletions