diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index ba289411f26f7dc9fbefe0a57a033be73b869043..20e53b167f81f5d4dd03507edb9eb93bf3ed7411 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -8065,6 +8065,7 @@ 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;