linux-kernel - [PATCH 4.2.y-ckt 202/211] net: fix uninitialized variable issue

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Message-Id: <1452023119-25647-203-git-send-email-kamal@canonical.com>
Date:	Tue,  5 Jan 2016 11:45:10 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Tadeusz Struk <tadeusz.struk@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 4.2.y-ckt 202/211] net: fix uninitialized variable issue

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

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

From: "tadeusz.struk@...el.com" <tadeusz.struk@...el.com>

[ 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@...ux.vnet.ibm.com>
Signed-off-by: Tadeusz Struk <tadeusz.struk@...el.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Kamal Mostafa <kamal@...onical.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

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