linux-kernel - [PATCH 3.13.y-ckt 150/156] caif: fix MSG_OOB test in caif_seqpkt

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Message-Id: <1428447093-3282-151-git-send-email-kamal@canonical.com>
Date:	Tue,  7 Apr 2015 15:51:27 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Al Viro <viro@...iv.linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 150/156] caif: fix MSG_OOB test in caif_seqpkt_recvmsg()

3.13.11-ckt19 -stable review patch.  If anyone has any objections, please let me know.

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

From: Al Viro <viro@...IV.linux.org.uk>

[ Upstream commit 3eeff778e00c956875c70b145c52638c313dfb23 ]

It should be checking flags, not msg->msg_flags.  It's ->sendmsg()
instances that need to look for that in ->msg_flags, ->recvmsg() ones
(including the other ->recvmsg() instance in that file, as well as
unix_dgram_recvmsg() this one claims to be imitating) check in flags.
Braino had been introduced in commit dcda13 ("caif: Bugfix - use MSG_TRUNC
in receive") back in 2010, so it goes quite a while back.

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 net/caif/caif_socket.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/caif/caif_socket.c b/net/caif/caif_socket.c
index d6be3ed..526bf56 100644
--- a/net/caif/caif_socket.c
+++ b/net/caif/caif_socket.c
@@ -283,7 +283,7 @@ static int caif_seqpkt_recvmsg(struct kiocb *iocb, struct socket *sock,
 	int copylen;
 
 	ret = -EOPNOTSUPP;
-	if (m->msg_flags&MSG_OOB)
+	if (flags & MSG_OOB)
 		goto read_error;
 
 	skb = skb_recv_datagram(sk, flags, 0 , &ret);
-- 
1.9.1

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