Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758647AbaJCWjF (ORCPT ); Fri, 3 Oct 2014 18:39:05 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:47838 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758527AbaJCWeQ (ORCPT ); Fri, 3 Oct 2014 18:34:16 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold Subject: [PATCH 3.14 075/238] USB: serial: fix potential heap buffer overflow Date: Fri, 3 Oct 2014 14:29:50 -0700 Message-Id: <20141003212916.074259339@linuxfoundation.org> X-Mailer: git-send-email 2.1.2 In-Reply-To: <20141003212913.680985295@linuxfoundation.org> References: <20141003212913.680985295@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit 5654699fb38512bdbfc0f892ce54fce75bdc2bab upstream. Make sure to verify the number of ports requested by subdriver to avoid writing beyond the end of fixed-size array in interface data. The current usb-serial implementation is limited to eight ports per interface but failed to verify that the number of ports requested by a subdriver (which could have been determined from device descriptors) did not exceed this limit. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/usb-serial.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -862,6 +862,11 @@ static int usb_serial_probe(struct usb_i num_ports = type->num_ports; } + if (num_ports > MAX_NUM_PORTS) { + dev_warn(ddev, "too many ports requested: %d\n", num_ports); + num_ports = MAX_NUM_PORTS; + } + serial->num_ports = num_ports; serial->num_bulk_in = num_bulk_in; serial->num_bulk_out = num_bulk_out; -- 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/