The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 7dad24db59d2d2803576f2e3645728866a056dab Mon Sep 17 00:00:00 2001 From: Mikulas Patocka mpatocka@redhat.com Date: Sun, 24 Jul 2022 14:33:52 -0400 Subject: [PATCH] dm raid: fix address sanitizer warning in raid_resume
There is a KASAN warning in raid_resume when running the lvm test lvconvert-raid.sh. The reason for the warning is that mddev->raid_disks is greater than rs->raid_disks, so the loop touches one entry beyond the allocated length.
Cc: stable@vger.kernel.org Signed-off-by: Mikulas Patocka mpatocka@redhat.com Signed-off-by: Mike Snitzer snitzer@kernel.org
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index f41fd3cf5c7d..e6a9b8cb22d3 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -3817,7 +3817,7 @@ static void attempt_restore_of_faulty_devices(struct raid_set *rs)
memset(cleared_failed_devices, 0, sizeof(cleared_failed_devices));
- for (i = 0; i < mddev->raid_disks; i++) { + for (i = 0; i < rs->raid_disks; i++) { r = &rs->dev[i].rdev; /* HM FIXME: enhance journal device recovery processing */ if (test_bit(Journal, &r->flags))