[4.2.y-ckt stable] Patch "af_iucv: Validate socket address length in iucv_sock_bind()" has been added to the 4.2.y-ckt tree

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    af_iucv: Validate socket address length in iucv_sock_bind()

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt5.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From 075092185bc299c5b70c1ced389d8f0c9e80e6e0 Mon Sep 17 00:00:00 2001
From: Ursula Braun <ursula.braun at de.ibm.com>
Date: Tue, 19 Jan 2016 10:41:33 +0100
Subject: af_iucv: Validate socket address length in iucv_sock_bind()

[ Upstream commit 52a82e23b9f2a9e1d429c5207f8575784290d008 ]

Signed-off-by: Ursula Braun <ursula.braun at de.ibm.com>
Reported-by: Dmitry Vyukov <dvyukov at google.com>
Reviewed-by: Evgeny Cherkashin <Eugene.Crosser at ru.ibm.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Kamal Mostafa <kamal at canonical.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 918151c..3a743d8e 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -709,6 +709,9 @@ 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;
--
2.7.0