--- mdadm.c~
+++ mdadm.c
@@ -1698,7 +1698,9 @@ int main(int argc, char *argv[])
 		break;
 	}
 	if (ss) {
-		ss->ss->free_super(ss);
+		if (ss->ss) {
+			ss->ss->free_super(ss);
+		}
 		free(ss);
 	}
 	if (locked)