Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755223Ab3IYAIp (ORCPT ); Tue, 24 Sep 2013 20:08:45 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:38458 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754983Ab3IYAIT (ORCPT ); Tue, 24 Sep 2013 20:08:19 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kees Cook , Rafi Rubin , Jiri Kosina Subject: [ 20/28] HID: ntrig: validate feature report details Date: Tue, 24 Sep 2013 17:07:51 -0700 Message-Id: <20130925000653.231748565@linuxfoundation.org> X-Mailer: git-send-email 1.8.4.3.gca3854a In-Reply-To: <20130925000648.404447782@linuxfoundation.org> References: <20130925000648.404447782@linuxfoundation.org> User-Agent: quilt/0.60-5.1.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1534 Lines: 46 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kees Cook commit 875b4e3763dbc941f15143dd1a18d10bb0be303b upstream. A HID device could send a malicious feature report that would cause the ntrig HID driver to trigger a NULL dereference during initialization: [57383.031190] usb 3-1: New USB device found, idVendor=1b96, idProduct=0001 ... [57383.315193] BUG: unable to handle kernel NULL pointer dereference at 0000000000000030 [57383.315308] IP: [] ntrig_probe+0x25e/0x420 [hid_ntrig] CVE-2013-2896 Signed-off-by: Kees Cook Signed-off-by: Rafi Rubin Signed-off-by: Jiri Kosina Signed-off-by: Greg Kroah-Hartman --- drivers/hid/hid-ntrig.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/hid/hid-ntrig.c +++ b/drivers/hid/hid-ntrig.c @@ -115,7 +115,8 @@ static inline int ntrig_get_mode(struct struct hid_report *report = hdev->report_enum[HID_FEATURE_REPORT]. report_id_hash[0x0d]; - if (!report) + if (!report || report->maxfield < 1 || + report->field[0]->report_count < 1) return -EINVAL; usbhid_submit_report(hdev, report, USB_DIR_IN); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/