dm thin: fix race condition when destroying thin pool workqueue

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When a thin pool is being destroyed delayed work items are
cancelled using cancel_delayed_work(), which doesn't guarantee that on
return the delayed item isn't running.  This can cause the work item to
requeue itself on an already destroyed workqueue.  Fix this by using
cancel_delayed_work_sync() which guarantees that on return the work item
is not running anymore.

Fixes: 905e51b39a ("dm thin: commit outstanding data every second")
Fixes: 85ad643b7e ("dm thin: add timeout to stop out-of-data-space mode holding IO forever")
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org

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Nikolay Borisov 2015-12-17 18:03:35 +02:00 • committed by Mike Snitzer

parent 512167788a

commit 18d03e8c25

1 changed files with 2 additions and 2 deletions

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drivers/md/dm-thin.c

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