netdev - [PATCH net] unix_diag: fix info leak

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Message-Id: <1380571540-15532-1-git-send-email-minipli@googlemail.com>
Date:	Mon, 30 Sep 2013 22:05:40 +0200
From:	Mathias Krause <minipli@...glemail.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	Mathias Krause <minipli@...glemail.com>, netdev@...r.kernel.org
Subject: [PATCH net] unix_diag: fix info leak

When filling the netlink message we miss to wipe the pad field,
therefore leak one byte of heap memory to userland. Fix this by
setting pad to 0.

Signed-off-by: Mathias Krause <minipli@...glemail.com>
---
Probably material for stable as well (v3.3+).

 net/unix/diag.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/net/unix/diag.c b/net/unix/diag.c
index d591091..86fa0f3 100644
--- a/net/unix/diag.c
+++ b/net/unix/diag.c
@@ -124,6 +124,7 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_r
 	rep->udiag_family = AF_UNIX;
 	rep->udiag_type = sk->sk_type;
 	rep->udiag_state = sk->sk_state;
+	rep->pad = 0;
 	rep->udiag_ino = sk_ino;
 	sock_diag_save_cookie(sk, rep->udiag_cookie);

-- 
1.7.10.4

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