From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934153AbaLBT41 (ORCPT ); Tue, 2 Dec 2014 14:56:27 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:46508 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754425AbaLBTU2 (ORCPT ); Tue, 2 Dec 2014 14:20:28 -0500 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Dan Carpenter , Mauro Carvalho Chehab , Kamal Mostafa Subject: [PATCH 3.13.y-ckt 012/121] [media] ttusb-dec: buffer overflow in ioctl Date: Tue, 2 Dec 2014 11:18:11 -0800 Message-Id: <1417548000-1794-13-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1417548000-1794-1-git-send-email-kamal@canonical.com> References: <1417548000-1794-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11-ckt12 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter commit f2e323ec96077642d397bb1c355def536d489d16 upstream. We need to add a limit check here so we don't overflow the buffer. Signed-off-by: Dan Carpenter Signed-off-by: Mauro Carvalho Chehab Reference: CVE-2014-8884 Signed-off-by: Kamal Mostafa --- drivers/media/usb/ttusb-dec/ttusbdecfe.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/usb/ttusb-dec/ttusbdecfe.c b/drivers/media/usb/ttusb-dec/ttusbdecfe.c index 5c45c9d..9c29552 100644 --- a/drivers/media/usb/ttusb-dec/ttusbdecfe.c +++ b/drivers/media/usb/ttusb-dec/ttusbdecfe.c @@ -156,6 +156,9 @@ static int ttusbdecfe_dvbs_diseqc_send_master_cmd(struct dvb_frontend* fe, struc 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + if (cmd->msg_len > sizeof(b) - 4) + return -EINVAL; + memcpy(&b[4], cmd->msg, cmd->msg_len); state->config->send_command(fe, 0x72, -- 1.9.1