af_iucv: Validate socket address length in iucv_sock_bind()

braunu · davem330 · commit 52a82e23b9f2 · 2016-01-19T14:21:08.000-05:00
Signed-off-by: Ursula Braun &lt;ursula.braun@de.ibm.com&gt;
Reported-by: Dmitry Vyukov &lt;dvyukov@google.com&gt;
Reviewed-by: Evgeny Cherkashin &lt;Eugene.Crosser@ru.ibm.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
@@ -708,6 +708,9 @@ static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr,
 	if (!addr || addr->sa_family != AF_IUCV)
 		return -EINVAL;
 
+	if (addr_len < sizeof(struct sockaddr_iucv))
+		return -EINVAL;
+
 	lock_sock(sk);
 	if (sk->sk_state != IUCV_OPEN) {
 		err = -EBADFD;
