linux-kernel - [ 01/25] net: sendmsg: fix failed backport of "fix NULL pointer dereference"

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Date:	Sat, 06 Dec 2014 18:41:49 +0100
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Andrey Ryabinin <a.ryabinin@...sung.com>,
	Luis Henriques <luis.henriques@...onical.com>,
	Willy Tarreau <w@....eu>
Subject: [ 01/25] net: sendmsg: fix failed backport of "fix NULL pointer
 dereference"

2.6.32-longterm review patch.  If anyone has any objections, please let me know.

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

From: Willy Tarreau <w@....eu>

Luis Henriques reported that while backporting commit 40eea80 ("net:
sendmsg: fix NULL pointer dereference") and applying the diff by hand,
I made a typo resulting in the same test being done twice, and msg_name
not being tested.

This fixes cf90357 ("net: sendmsg: fix NULL pointer dereference")
which was merged into 2.6.32.64.

Cc: Andrey Ryabinin <a.ryabinin@...sung.com>
Cc: Luis Henriques <luis.henriques@...onical.com>
Signed-off-by: Willy Tarreau <w@....eu>
---
 net/compat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/compat.c b/net/compat.c
index 71ed839..a5848ac 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -83,7 +83,7 @@ int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
 {
 	int tot_len;
 
-	if (kern_msg->msg_namelen && kern_msg->msg_namelen) {
+	if (kern_msg->msg_name && kern_msg->msg_namelen) {
 		if (mode==VERIFY_READ) {
 			int err = move_addr_to_kernel(kern_msg->msg_name,
 						      kern_msg->msg_namelen,
-- 
1.7.12.2.21.g234cd45.dirty



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