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@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 7dad24db59d2d2803576f2e3645728866a056dab Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
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@xxxxxxxxxxxxxxx
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
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))
