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Commit 792e51aa authored by Luo Meng's avatar Luo Meng Committed by Greg Kroah-Hartman
Browse files

dm integrity: Fix UAF in dm_integrity_dtr() 



commit f50cb2cbabd6c4a60add93d72451728f86e4791c upstream.

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: 7eada909 ("dm: add integrity 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 7ae6aa64

drivers/md/dm-integrity.c

+2 −0
Original line number Diff line number Diff line
@@ -4195,6 +4195,8 @@ 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)