This is a note to let you know that I've just added the patch titled
dm raid: fix address sanitizer warning in raid_resume
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-address-sanitizer-warning-in-raid_resume.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 7dad24db59d2d2803576f2e3645728866a056dab Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Date: Sun, 24 Jul 2022 14:33:52 -0400
Subject: dm raid: fix address sanitizer warning in raid_resume
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
commit 7dad24db59d2d2803576f2e3645728866a056dab upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-raid.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -3804,7 +3804,7 @@ static void attempt_restore_of_faulty_de
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))
Patches currently in stable-queue which might be from mpatocka@xxxxxxxxxx are
queue-4.19/md-raid10-fix-kasan-warning.patch
queue-4.19/dm-raid-fix-address-sanitizer-warning-in-raid_status.patch
queue-4.19/dm-raid-fix-address-sanitizer-warning-in-raid_resume.patch
queue-4.19/add-barriers-to-buffer_uptodate-and-set_buffer_uptodate.patch
queue-4.19/dm-writecache-set-a-default-max_writeback_jobs.patch
