forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions

dm raid: fix KASAN warning in raid5_add_disks

Browse source 
commit 617b365872 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@vger.kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mikulas Patocka 2022-06-29 13:40:57 -04:00 • committed by Greg Kroah-Hartman
commit d8bca518d5
1 changed files with 1 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
drivers/md/raid5.c
View file

@ -8004,6 +8004,7 @@ static int raid5_add_disk(struct mddev *mddev, struct md_rdev *rdev)
*/
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;