netdev - [PATCH net 1/1] af_iucv: Validate socket address length in iucv_sock

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Message-Id: <1453196493-57590-2-git-send-email-ubraun@linux.vnet.ibm.com>
Date:	Tue, 19 Jan 2016 10:41:33 +0100
From:	Ursula Braun <ubraun@...ux.vnet.ibm.com>
To:	davem@...emloft.net, mschwid2@...ux.vnet.ibm.com,
	heicars2@...ux.vnet.ibm.com, netdev@...r.kernel.org,
	linux-s390@...r.kernel.org
Cc:	ubraunu@...ux.vnet.ibm.com
Subject: [PATCH net 1/1] af_iucv: Validate socket address length in iucv_sock_bind()

From: Ursula Braun <ursula.braun@...ibm.com>

Signed-off-by: Ursula Braun <ursula.braun@...ibm.com>
Reported-by: Dmitry Vyukov <dvyukov@...gle.com>
Reviewed-by: Evgeny Cherkashin <Eugene.Crosser@...ibm.com>
---
 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 ef50a94..fc3598a 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;
-- 
2.3.9