From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Salva=20Peir=C3=B3?= , "David S. Miller" Subject: [ 21/32] wanxl: fix info leak in ioctl Date: Fri, 1 Nov 2013 14:43:32 -0700 Message-Id: <20131101214318.682001473@linuxfoundation.org> In-Reply-To: <20131101214313.735463599@linuxfoundation.org> References: <20131101214313.735463599@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Salva Peiró [ Upstream commit 2b13d06c9584b4eb773f1e80bbaedab9a1c344e1 ] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/net/wan/wanxl.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/wan/wanxl.c +++ b/drivers/net/wan/wanxl.c @@ -355,6 +355,7 @@ static int wanxl_ioctl(struct net_device 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;