diff --git a/drivers/md/md.c b/drivers/md/md.c
index 15e4668f594cf64843dd2f4ce5cf946f97d1459f..e014d39159d7a6e3cce9f99cf9b61d15865d15df 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5852,8 +5852,14 @@ void md_stop(struct mddev *mddev)
 	 * This is called from dm-raid
 	 */
 	__md_stop(mddev);
-	if (mddev->bio_set)
+	if (mddev->bio_set) {
 		bioset_free(mddev->bio_set);
+		mddev->bio_set = NULL;
+	}
+	if (mddev->sync_set) {
+		bioset_free(mddev->sync_set);
+		mddev->sync_set = NULL;
+	}
 }
 
 EXPORT_SYMBOL_GPL(md_stop);