Blame patches.suse/dm-raid-fix-KASAN-warning-in-raid5_add_disks.patch
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From: Mikulas Patocka <mpatocka@redhat.com>
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Date: Wed, 29 Jun 2022 13:40:57 -0400
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Subject: [PATCH] dm raid: fix KASAN warning in raid5_add_disks
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Git-commit: 617b365872a247480e9dcd50a32c8d1806b21861
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Patch-mainline: v5.19
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References: git-fixes
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There's a KASAN warning in raid5_add_disk when running the LVM testsuite.
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The warning happens in the test
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lvconvert-raid-reshape-linear_to_raid6-single-type.sh. We fix the warning
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by verifying that rdev->saved_raid_disk is within limits.
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Cc: stable@vger.kernel.org
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Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
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Signed-off-by: Mike Snitzer <snitzer@kernel.org>
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Acked-by: NeilBrown <neilb@suse.com>
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---
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drivers/md/raid5.c | 1 +
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1 file changed, 1 insertion(+)
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--- a/drivers/md/raid5.c
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+++ b/drivers/md/raid5.c
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@@ -7725,6 +7725,7 @@ static int raid5_add_disk(struct mddev *
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*/
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if (rdev->saved_raid_disk >= 0 &&
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rdev->saved_raid_disk >= first &&
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+ rdev->saved_raid_disk <= last &&
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conf->disks[rdev->saved_raid_disk].rdev == NULL)
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first = rdev->saved_raid_disk;
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