[4.2.y-ckt stable] Patch "net: fix uninitialized variable issue" has been added to staging queue

[Kamal Mostafa]

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

    net: fix uninitialized variable issue

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-ckt1.

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

------

>From 4c5440642275531fcc4edc3d5dc654aece49606b Mon Sep 17 00:00:00 2001
From: "tadeusz.struk at intel.com" <tadeusz.struk at intel.com>
Date: Tue, 15 Dec 2015 10:46:17 -0800
Subject: net: fix uninitialized variable issue

[ Upstream commit 130ed5d105dde141e7fe60d5440aa53e0a84f13b ]

msg_iocb needs to be initialized on the recv/recvfrom path.
Otherwise afalg will wrongly interpret it as an async call.

Reported-by: Harald Freudenberger <freude at linux.vnet.ibm.com>
Signed-off-by: Tadeusz Struk <tadeusz.struk at intel.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 net/socket.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/socket.c b/net/socket.c
index 9963a0b..f3fbe17 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1702,6 +1702,7 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
 	msg.msg_name = addr ? (struct sockaddr *)&address : NULL;
 	/* We assume all kernel code knows the size of sockaddr_storage */
 	msg.msg_namelen = 0;
+	msg.msg_iocb = NULL;
 	if (sock->file->f_flags & O_NONBLOCK)
 		flags |= MSG_DONTWAIT;
 	err = sock_recvmsg(sock, &msg, iov_iter_count(&msg.msg_iter), flags);
--
1.9.1