Commit e4b5957c authored by Luo Meng's avatar Luo Meng Committed by Mike Snitzer
Browse files

dm clone: Fix UAF in clone_dtr() 



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

Therefore, cancelling timer again in clone_dtr().

Cc: stable@vger.kernel.org
Fixes: 7431b783 ("dm: add clone target")
Signed-off-by: default avatarLuo Meng <luomeng12@huawei.com>
Signed-off-by: default avatarMike Snitzer <snitzer@kernel.org>
parent 88430ebc

drivers/md/dm-clone-target.c

+1 −0
Original line number Diff line number Diff line
@@ -1958,6 +1958,7 @@ static void clone_dtr(struct dm_target *ti) 


	mempool_exit(&clone->hydration_pool);

	dm_kcopyd_client_destroy(clone->kcopyd_client);

	cancel_delayed_work_sync(&clone->waker);

	destroy_workqueue(clone->wq);

	hash_table_exit(clone);

	dm_clone_metadata_close(clone->cmd);