diff --git a/trunk/linux-3.4.x/drivers/net/ppp/pppoe.c b/trunk/linux-3.4.x/drivers/net/ppp/pppoe.c
index 5556afa7b..be376275f 100644
--- a/trunk/linux-3.4.x/drivers/net/ppp/pppoe.c
+++ b/trunk/linux-3.4.x/drivers/net/ppp/pppoe.c
@@ -624,6 +624,10 @@ static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr,
 	lock_sock(sk);
 
 	error = -EINVAL;
+
+	if (sockaddr_len != sizeof(struct sockaddr_pppox))
+		goto end;
+
 	if (sp->sa_protocol != PX_PROTO_OE)
 		goto end;