From patchwork Mon Sep 30 10:11:01 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Henriques X-Patchwork-Id: 279095 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id 030152C0082 for ; Mon, 30 Sep 2013 20:19:02 +1000 (EST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1VQaZ6-0007mh-NC; Mon, 30 Sep 2013 10:18:56 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1VQaTi-0004yc-GE for kernel-team@lists.ubuntu.com; Mon, 30 Sep 2013 10:13:22 +0000 Received: from bl15-111-94.dsl.telepac.pt ([188.80.111.94] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1VQaTi-0003jg-9c; Mon, 30 Sep 2013 10:13:22 +0000 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Subject: [PATCH 084/104] HID: pantherlord: validate output report details Date: Mon, 30 Sep 2013 11:11:01 +0100 Message-Id: <1380535881-9239-85-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1380535881-9239-1-git-send-email-luis.henriques@canonical.com> References: <1380535881-9239-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.5 Cc: Jiri Kosina , Kees Cook X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com 3.5.7.22 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Kees Cook commit 412f30105ec6735224535791eed5cdc02888ecb4 upstream. A HID device could send a malicious output report that would cause the pantherlord HID driver to write beyond the output report allocation during initialization, causing a heap overflow: [ 310.939483] usb 1-1: New USB device found, idVendor=0e8f, idProduct=0003 ... [ 315.980774] BUG kmalloc-192 (Tainted: G W ): Redzone overwritten CVE-2013-2892 Signed-off-by: Kees Cook Signed-off-by: Jiri Kosina Signed-off-by: Luis Henriques --- drivers/hid/hid-pl.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/hid/hid-pl.c b/drivers/hid/hid-pl.c index 47ed74c..00cd2f8 100644 --- a/drivers/hid/hid-pl.c +++ b/drivers/hid/hid-pl.c @@ -129,8 +129,14 @@ static int plff_init(struct hid_device *hid) strong = &report->field[0]->value[2]; weak = &report->field[0]->value[3]; debug("detected single-field device"); - } else if (report->maxfield >= 4 && report->field[0]->maxusage == 1 && - report->field[0]->usage[0].hid == (HID_UP_LED | 0x43)) { + } else if (report->field[0]->maxusage == 1 && + report->field[0]->usage[0].hid == + (HID_UP_LED | 0x43) && + report->maxfield >= 4 && + report->field[0]->report_count >= 1 && + report->field[1]->report_count >= 1 && + report->field[2]->report_count >= 1 && + report->field[3]->report_count >= 1) { report->field[0]->value[0] = 0x00; report->field[1]->value[0] = 0x00; strong = &report->field[2]->value[0];