From: Ursula Braun <ursula.braun@de.ibm.com>
Date: Tue, 19 Jan 2016 09:41:33 +0000 (+0100)
Subject: af_iucv: Validate socket address length in iucv_sock_bind()
X-Git-Tag: v4.5-rc3~21^2~65
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=52a82e23b9f2a9e1d429c5207f8575784290d008;p=linux.git

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>
---

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;