linux-kernel - [PATCH 3.2 092/115] af_iucv: Validate socket address length in iucv_sock

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Date:	Wed, 27 Apr 2016 01:02:24 +0200
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "David S. Miller" <davem@...emloft.net>,
	"Dmitry Vyukov" <dvyukov@...gle.com>,
	"Evgeny Cherkashin" <Eugene.Crosser@...ibm.com>,
	"Ursula Braun" <ursula.braun@...ibm.com>
Subject: [PATCH 3.2 092/115] af_iucv: Validate socket address length in 
 iucv_sock_bind()

3.2.80-rc1 review patch.  If anyone has any objections, please let me know.

------------------

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

[ Upstream commit 52a82e23b9f2a9e1d429c5207f8575784290d008 ]

Signed-off-by: Ursula Braun <ursula.braun@...ibm.com>
Reported-by: Dmitry Vyukov <dvyukov@...gle.com>
Reviewed-by: Evgeny Cherkashin <Eugene.Crosser@...ibm.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/iucv/af_iucv.c | 3 +++
 1 file changed, 3 insertions(+)

--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -708,6 +708,9 @@ static int iucv_sock_bind(struct socket
 	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;