Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753109AbdFGXvH (ORCPT ); Wed, 7 Jun 2017 19:51:07 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:50491 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752844AbdFGXEC (ORCPT ); Wed, 7 Jun 2017 19:04:02 -0400 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux@roeck-us.net Cc: Johan Hovold , Dmitry Torokhov , Willy Tarreau Subject: [PATCH 3.10 182/250] Input: yealink - validate number of endpoints before using them Date: Thu, 8 Jun 2017 00:59:28 +0200 Message-Id: <1496876436-32402-183-git-send-email-w@1wt.eu> X-Mailer: git-send-email 2.8.0.rc2.1.gbe9624a In-Reply-To: <1496876436-32402-1-git-send-email-w@1wt.eu> References: <1496876436-32402-1-git-send-email-w@1wt.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1037 Lines: 32 From: Johan Hovold commit 5cc4a1a9f5c179795c8a1f2b0f4361829d6a070e upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Fixes: aca951a22a1d ("[PATCH] input-driver-yealink-P1K-usb-phone") Signed-off-by: Johan Hovold Signed-off-by: Dmitry Torokhov Signed-off-by: Willy Tarreau --- drivers/input/misc/yealink.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/input/misc/yealink.c b/drivers/input/misc/yealink.c index 285a5bd..3b6fdb3 100644 --- a/drivers/input/misc/yealink.c +++ b/drivers/input/misc/yealink.c @@ -876,6 +876,10 @@ static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id) int ret, pipe, i; interface = intf->cur_altsetting; + + if (interface->desc.bNumEndpoints < 1) + return -ENODEV; + endpoint = &interface->endpoint[0].desc; if (!usb_endpoint_is_int_in(endpoint)) return -ENODEV; -- 2.8.0.rc2.1.gbe9624a