1 files changed, 2 insertions, 1 deletions

diff --git a/include/net/cls_cgroup.h b/include/net/cls_cgroup.h
index ef6c24a529e1..a4dc5b027bd9 100644
--- a/include/net/cls_cgroup.h
+++ b/include/net/cls_cgroup.h
@@ -51,7 +51,8 @@ static inline u32 task_cls_classid(struct task_struct *p)
                 return 0;
 
         rcu_read_lock();
-        id = rcu_dereference(net_cls_subsys_id);
+        id = rcu_dereference_index_check(net_cls_subsys_id,
+                                         rcu_read_lock_held());
         if (id >= 0)
                 classid = container_of(task_subsys_state(p, id),
                                        struct cgroup_cls_state, css)->classid;