From 2b13d06c9584b4eb773f1e80bbaedab9a1c344e1 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Salva=20Peir=C3=B3?= Date: Wed, 16 Oct 2013 12:46:50 +0200 Subject: [PATCH] wanxl: fix info leak in ioctl MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 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 Signed-off-by: David S. Miller --- drivers/net/wan/wanxl.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wan/wanxl.c b/drivers/net/wan/wanxl.c index 6a24a5a70cc7..4c0a69779b89 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; -- 2.30.2