From: Luo Meng Date: Tue, 29 Nov 2022 02:48:50 +0000 (+0800) Subject: dm integrity: Fix UAF in dm_integrity_dtr() X-Git-Tag: v6.6.17~5960^2~8 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f50cb2cbabd6c4a60add93d72451728f86e4791c;p=platform%2Fkernel%2Flinux-rpi.git dm integrity: Fix UAF in dm_integrity_dtr() 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: 7eada909bfd7a ("dm: add integrity target") Signed-off-by: Luo Meng Signed-off-by: Mike Snitzer --- diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c index e97e9f9..1388ee35 100644 --- a/drivers/md/dm-integrity.c +++ b/drivers/md/dm-integrity.c @@ -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)