Index: sys/compat/linux/linux_socket.c
===================================================================
--- sys/compat/linux/linux_socket.c
+++ sys/compat/linux/linux_socket.c
@@ -1199,7 +1199,7 @@
 	if (error != 0)
 		goto bad;
 
-	if (msg->msg_name) {
+	if (msg->msg_name && msg->msg_namelen != 0) {
 		msg->msg_name = PTRIN(linux_msghdr.msg_name);
 		error = bsd_to_linux_sockaddr(sa, &lsa, msg->msg_namelen);
 		if (error == 0)