--- x/net/core/skmsg.c
+++ y/net/core/skmsg.c
@@ -500,7 +500,13 @@ out:
 int sk_msg_recvmsg(struct sock *sk, struct sk_psock *psock, struct msghdr *msg,
 		   int len, int flags)
 {
-	return __sk_msg_recvmsg(sk, psock, msg, len, flags, NULL);
+	static DEFINE_MUTEX(lk);
+	int rc;
+
+	mutex_lock(&lk);
+	rc = __sk_msg_recvmsg(sk, psock, msg, len, flags, NULL);
+	mutex_unlock(&lk);
+	return rc;
 }
 EXPORT_SYMBOL_GPL(sk_msg_recvmsg);