diff --git a/fs/namespace.c b/fs/namespace.c
index b682a044cf0e169f2a1b9ee47836fefdb31e6e31..ef1398d176c66285eba98985a751326689cf57e3 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2210,6 +2210,10 @@ static int do_change_type(struct path *path, int ms_flags)
 		return -EINVAL;
 
 	namespace_lock();
+	if (!check_mnt(mnt)) {
+		err = -EINVAL;
+		goto out_unlock;
+	}
 	if (type == MS_SHARED) {
 		err = invent_group_ids(mnt, recurse);
 		if (err)