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Commit 520b56cf authored by Luo Meng's avatar Luo Meng Committed by Greg Kroah-Hartman
Browse files

dm clone: Fix UAF in clone_dtr() 



commit e4b5957c6f749a501c464f92792f1c8e26b61a94 upstream.

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>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 792e51aa

drivers/md/dm-clone-target.c

+1 −0
Original line number Diff line number Diff line
@@ -1977,6 +1977,7 @@ 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);