diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index dfe7d62d3fbd..e9648d643dd1 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2157,9 +2157,12 @@ static int raid10_remove_disk(struct mddev *mddev, struct md_rdev *rdev)
 	int err = 0;
 	int number = rdev->raid_disk;
 	struct md_rdev **rdevp;
-	struct raid10_info *p = conf->mirrors + number;
+	struct raid10_info *p;
 
 	print_conf(conf);
+	if (unlikely(number >= mddev->raid_disks))
+		return 0;
+	p = conf->mirrors + number;
 	if (rdev == p->rdev)
 		rdevp = &p->rdev;
 	else if (rdev == p->replacement)