bluetooth: Validate socket address length in sco_sock_bind().

[ Upstream commit 5233252f ]
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

net/bluetooth/sco.c

@@ -475,6 +475,9 @@ static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_le
 	if (!addr || addr->sa_family != AF_BLUETOOTH)
 		return -EINVAL;
 
+	if (addr_len < sizeof(struct sockaddr_sco))
+		return -EINVAL;
+
 	lock_sock(sk);
 
 	if (sk->sk_state != BT_OPEN) {