diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 422cb19f156ef9b7a6f5ab8968ade8a618ea5d88..3ac6f5b0a64b7448aceac7407c04cf7109f7ef5d 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4598,7 +4598,7 @@ static int alloc_css_id(struct cgroup_subsys *ss, struct cgroup *parent,
 	parent_css = parent->subsys[subsys_id];
 	child_css = child->subsys[subsys_id];
 	parent_id = parent_css->id;
-	depth = parent_id->depth;
+	depth = parent_id->depth + 1;
 
 	child_id = get_new_cssid(ss, depth);
 	if (IS_ERR(child_id))