Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932486AbcDKNYI (ORCPT ); Mon, 11 Apr 2016 09:24:08 -0400 Received: from mx2.suse.de ([195.135.220.15]:37487 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932365AbcDKNX5 (ORCPT ); Mon, 11 Apr 2016 09:23:57 -0400 X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Johan Hovold , Jiri Slaby Subject: [PATCH 3.12 24/98] USB: visor: fix null-deref at probe Date: Mon, 11 Apr 2016 15:22:26 +0200 Message-Id: X-Mailer: git-send-email 2.8.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1241 Lines: 40 From: Johan Hovold 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit cac9b50b0d75a1d50d6c056ff65c005f3224c8e0 upstream. Fix null-pointer dereference at probe should a (malicious) Treo device lack the expected endpoints. Specifically, the Treo port-setup hack was dereferencing the bulk-in and interrupt-in urbs without first making sure they had been allocated by core. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Johan Hovold Signed-off-by: Jiri Slaby --- drivers/usb/serial/visor.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c index 9c61a8671721..605068e6acf2 100644 --- a/drivers/usb/serial/visor.c +++ b/drivers/usb/serial/visor.c @@ -551,6 +551,11 @@ static int treo_attach(struct usb_serial *serial) (serial->num_interrupt_in == 0)) return 0; + if (serial->num_bulk_in < 2 || serial->num_interrupt_in < 2) { + dev_err(&serial->interface->dev, "missing endpoints\n"); + return -ENODEV; + } + /* * It appears that Treos and Kyoceras want to use the * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint, -- 2.8.1