--- x/net/ipv4/inet_connection_sock.c
+++ y/net/ipv4/inet_connection_sock.c
@@ -589,7 +589,7 @@ int inet_csk_get_port(struct sock *sk, u
 success:
 	inet_csk_update_fastreuse(tb, sk);
 
-	if (!inet_csk(sk)->icsk_bind_hash)
+	if (tb != inet_csk(sk)->icsk_bind_hash)
 		inet_bind_hash(sk, tb, tb2, port);
 	WARN_ON(inet_csk(sk)->icsk_bind_hash != tb);
 	WARN_ON(inet_csk(sk)->icsk_bind2_hash != tb2);