diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 6d870f2d1228..bf4f78f026e8 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4599,7 +4599,7 @@ 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))