This is a note to let you know that I've just added the patch titled
dm raid: fix KASAN warning in raid5_add_disks
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dm-raid-fix-kasan-warning-in-raid5_add_disks.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 617b365872a247480e9dcd50a32c8d1806b21861 Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Date: Wed, 29 Jun 2022 13:40:57 -0400
Subject: dm raid: fix KASAN warning in raid5_add_disks
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
commit 617b365872a247480e9dcd50a32c8d1806b21861 upstream.
There's a KASAN warning in raid5_add_disk when running the LVM testsuite.
The warning happens in the test
lvconvert-raid-reshape-linear_to_raid6-single-type.sh. We fix the warning
by verifying that rdev->saved_raid_disk is within limits.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/raid5.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -7716,6 +7716,7 @@ static int raid5_add_disk(struct mddev *
*/
if (rdev->saved_raid_disk >= 0 &&
rdev->saved_raid_disk >= first &&
+ rdev->saved_raid_disk <= last &&
conf->disks[rdev->saved_raid_disk].rdev == NULL)
first = rdev->saved_raid_disk;
Patches currently in stable-queue which might be from mpatocka@xxxxxxxxxx are
queue-4.19/dm-raid-fix-kasan-warning-in-raid5_add_disks.patch
