diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2013-06-12 14:04:46 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-20 12:01:27 -0700 |
| commit | 979d73667f6eac3e7d6010e88de9de04245ad1c3 (patch) | |
| tree | 88cc0d92399c44175cf749409880762d5c8c6f48 /kernel | |
| parent | 4b73febd1ba302268aabe370de25601eaa884b25 (diff) | |
audit: wait_for_auditd() should use TASK_UNINTERRUPTIBLE
commit f000cfdde5de4fc15dead5ccf524359c07eadf2b upstream.
audit_log_start() does wait_for_auditd() in a loop until
audit_backlog_wait_time passes or audit_skb_queue has a room.
If signal_pending() is true this becomes a busy-wait loop, schedule() in
TASK_INTERRUPTIBLE won't block.
Thanks to Guy for fully investigating and explaining the problem.
(akpm: that'll cause the system to lock up on a non-preemptible
uniprocessor kernel)
(Guy: "Our customer was in fact running a uniprocessor machine, and they
reported a system hang.")
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Guy Streeter <streeter@redhat.com>
Cc: Eric Paris <eparis@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/audit.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index d596e5355f15..8a667f103661 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -1107,7 +1107,7 @@ static inline void audit_get_stamp(struct audit_context *ctx, static void wait_for_auditd(unsigned long sleep_time) { DECLARE_WAITQUEUE(wait, current); - set_current_state(TASK_INTERRUPTIBLE); + set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&audit_backlog_wait, &wait); if (audit_backlog_limit && |