diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index 83c78379932e..fb659fd65bd2 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -772,6 +772,7 @@ struct sk_psock *sk_psock_init(struct sock *sk, int node)
 	__rcu_assign_sk_user_data_with_flags(sk, psock,
 					     SK_USER_DATA_NOCOPY |
 					     SK_USER_DATA_PSOCK);
+	printk(KERN_ERR "sk_user_data: %px\n", sk->sk_user_data);
 	sock_hold(sk);
 
 out:
diff --git a/net/rds/tcp.c b/net/rds/tcp.c
index 3cc2f303bf78..fca9807fafa0 100644
--- a/net/rds/tcp.c
+++ b/net/rds/tcp.c
@@ -198,6 +198,9 @@ void rds_tcp_set_callbacks(struct socket *sock, struct rds_conn_path *cp)
 	rdsdebug("setting sock %p callbacks to tc %p\n", sock, tc);
 	write_lock_bh(&sock->sk->sk_callback_lock);
 
+	WARN_ONCE(sock->sk->sk_user_data, "sk_user_data: %px, prot: %pS, destroy: %pS\n",
+		  sock->sk->sk_user_data, sock->sk->sk_prot, sock->sk->sk_prot->destroy);
+
 	/* done under the callback_lock to serialize with write_space */
 	spin_lock(&rds_tcp_tc_list_lock);
 	list_add_tail(&tc->t_list_item, &rds_tcp_tc_list);