--- x/net/core/sock.c
+++ y/net/core/sock.c
@@ -3180,6 +3180,8 @@ EXPORT_SYMBOL(sock_init_data);
 void lock_sock_nested(struct sock *sk, int subclass)
 {
 	might_sleep();
+	mutex_acquire(&sk->sk_lock.dep_map, subclass, 0, _RET_IP_);
+	mutex_release(&sk->sk_lock.dep_map, _RET_IP_);
 	spin_lock_bh(&sk->sk_lock.slock);
 	if (sk->sk_lock.owned)
 		__lock_sock(sk);