diff --git a/kernel/cgroup/namespace.c b/kernel/cgroup/namespace.c
index ea4ee13936be..76660332ec64 100644
--- a/kernel/cgroup/namespace.c
+++ b/kernel/cgroup/namespace.c
@@ -53,8 +53,6 @@ struct cgroup_namespace *copy_cgroup_ns(u64 flags,
 	struct ucounts *ucounts;
 	struct css_set *cset;
 
-	BUG_ON(!old_ns);
-
 	if (!(flags & CLONE_NEWCGROUP)) {
 		get_cgroup_ns(old_ns);
 		return old_ns;