diff options
Diffstat (limited to 'kernel/signal.c')
-rw-r--r-- | kernel/signal.c | 14 |
1 files changed, 1 insertions, 13 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index 50c992643771..f2b96b08fb44 100644 --- a/kernel/signal.c +++ b/kernel/signal.c | |||
@@ -397,20 +397,8 @@ void __exit_signal(struct task_struct *tsk) | |||
397 | flush_sigqueue(&tsk->pending); | 397 | flush_sigqueue(&tsk->pending); |
398 | if (sig) { | 398 | if (sig) { |
399 | /* | 399 | /* |
400 | * We are cleaning up the signal_struct here. We delayed | 400 | * We are cleaning up the signal_struct here. |
401 | * calling exit_itimers until after flush_sigqueue, just in | ||
402 | * case our thread-local pending queue contained a queued | ||
403 | * timer signal that would have been cleared in | ||
404 | * exit_itimers. When that called sigqueue_free, it would | ||
405 | * attempt to re-take the tasklist_lock and deadlock. This | ||
406 | * can never happen if we ensure that all queues the | ||
407 | * timer's signal might be queued on have been flushed | ||
408 | * first. The shared_pending queue, and our own pending | ||
409 | * queue are the only queues the timer could be on, since | ||
410 | * there are no other threads left in the group and timer | ||
411 | * signals are constrained to threads inside the group. | ||
412 | */ | 401 | */ |
413 | exit_itimers(sig); | ||
414 | exit_thread_group_keys(sig); | 402 | exit_thread_group_keys(sig); |
415 | kmem_cache_free(signal_cachep, sig); | 403 | kmem_cache_free(signal_cachep, sig); |
416 | } | 404 | } |