From 2b13d06c9584b4eb773f1e80bbaedab9a1c344e1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Salva=20Peir=C3=B3?= <speiro@ai2.upv.es>
Date: Wed, 16 Oct 2013 12:46:50 +0200
Subject: wanxl: fix info leak in ioctl
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The wanxl_ioctl() code fails to initialize the two padding bytes of
struct sync_serial_settings after the ->loopback member. Add an explicit
memset(0) before filling the structure to avoid the info leak.

Signed-off-by: Salva Peiró <speiro@ai2.upv.es>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/wan/wanxl.c b/drivers/net/wan/wanxl.c
index 6a24a5a..4c0a697 100644
--- a/drivers/net/wan/wanxl.c
+++ b/drivers/net/wan/wanxl.c
@@ -355,6 +355,7 @@ static int wanxl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 			ifr->ifr_settings.size = size; /* data size wanted */
 			return -ENOBUFS;
 		}
+		memset(&line, 0, sizeof(line));
 		line.clock_type = get_status(port)->clocking;
 		line.clock_rate = 0;
 		line.loopback = 0;
-- 
cgit v0.10.2