--- a/net/smc/af_smc.c	2022-03-05 18:57:30.117068900 +0800
+++ b/net/smc/af_smc.c	2022-03-05 21:12:36.514451200 +0800
@@ -218,6 +218,7 @@ static int smc_release(struct socket *so
 	sock_orphan(sk);
 	sock->sk = NULL;
 	release_sock(sk);
+	synchronize_rcu();
 
 	sock_put(sk); /* sock_hold above */
 	sock_put(sk); /* final sock_put */
--- a/net/smc/smc_close.c	2022-03-05 20:52:07.514821000 +0800
+++ b/net/smc/smc_close.c	2022-03-05 21:02:42.136301400 +0800
@@ -29,6 +29,7 @@ void smc_clcsock_release(struct smc_sock
 		cancel_work_sync(&smc->smc_listen_work);
 	mutex_lock(&smc->clcsock_release_lock);
 	if (smc->clcsock) {
+		rcu_assign_sk_user_data(smc->clcsock->sk, NULL);
 		tcp = smc->clcsock;
 		smc->clcsock = NULL;
 		sock_release(tcp);