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dm integrity: Fix UAF in dm_integrity_dtr()

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Dm_integrity also has the same UAF problem when dm_resume()
and dm_destroy() are concurrent.

Therefore, cancelling timer again in dm_integrity_dtr().

Cc: stable@vger.kernel.org
Fixes: 7eada909bf ("dm: add integrity target")
Signed-off-by: Luo Meng <luomeng12@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
This commit is contained in:
Luo Meng 2022-11-29 10:48:50 +08:00 committed by Mike Snitzer
parent 6a459d8edb
commit f50cb2cbab
1 changed files with 2 additions and 0 deletions
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2
drivers/md/dm-integrity.c
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@ -4558,6 +4558,8 @@ static void dm_integrity_dtr(struct dm_target *ti)
BUG_ON(!RB_EMPTY_ROOT(&ic->in_progress));
BUG_ON(!list_empty(&ic->wait_list));
if (ic->mode == 'B')
cancel_delayed_work_sync(&ic->bitmap_flush_work);
if (ic->metadata_wq)
destroy_workqueue(ic->metadata_wq);
if (ic->wait_wq)