From 52a82e23b9f2a9e1d429c5207f8575784290d008 Mon Sep 17 00:00:00 2001
From: Ursula Braun <ursula.braun@de.ibm.com>
Date: Tue, 19 Jan 2016 10:41:33 +0100
Subject: [PATCH] af_iucv: Validate socket address length in iucv_sock_bind()
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Evgeny Cherkashin <Eugene.Crosser@ru.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/iucv/af_iucv.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index ef50a94d3eb7..fc3598a922b0 100644
--- 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;