Commit bc258879 authored Mar 14, 2017 by Linus Torvalds

Merge branch 'for-4.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

Pull workqueue fix from Tejun Heo:
 "If a delayed work is queued with NULL @wq, workqueue code explodes
  after the timer expires at which point it's difficult to tell who the
  culprit was.

  This actually happened and the offender was net/smc this time.

  Add an explicit sanity check for it in the queueing path"

* 'for-4.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: trigger WARN if queue_delayed_work() is called with NULL @wq

parents 83e63226 637fdbae

kernel/workqueue.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1507,6 +1507,7 @@ static void __queue_delayed_work(int cpu, struct workqueue_struct *wq,
		struct timer_list *timer = &dwork->timer;
		struct work_struct *work = &dwork->work;

		WARN_ON_ONCE(!wq);
		WARN_ON_ONCE(timer->function != delayed_work_timer_fn \|\|
		timer->data != (unsigned long)dwork);
		WARN_ON_ONCE(timer_pending(timer));