Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755511AbdC1Nzy (ORCPT ); Tue, 28 Mar 2017 09:55:54 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:58832 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751711AbdC1MdG (ORCPT ); Tue, 28 Mar 2017 08:33:06 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold , Dmitry Torokhov Subject: [PATCH 4.4 14/76] Input: iforce - validate number of endpoints before using them Date: Tue, 28 Mar 2017 14:30:11 +0200 Message-Id: <20170328122600.567217399@linuxfoundation.org> X-Mailer: git-send-email 2.12.1 In-Reply-To: <20170328122559.966310440@linuxfoundation.org> References: <20170328122559.966310440@linuxfoundation.org> User-Agent: quilt/0.65 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 Content-Length: 1005 Lines: 33 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit 59cf8bed44a79ec42303151dd014fdb6434254bb upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer or accessing memory that lie beyond the end of the endpoint array should a malicious device lack the expected endpoints. Signed-off-by: Johan Hovold Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/input/joystick/iforce/iforce-usb.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/input/joystick/iforce/iforce-usb.c +++ b/drivers/input/joystick/iforce/iforce-usb.c @@ -141,6 +141,9 @@ static int iforce_usb_probe(struct usb_i interface = intf->cur_altsetting; + if (interface->desc.bNumEndpoints < 2) + return -ENODEV; + epirq = &interface->endpoint[0].desc; epout = &interface->endpoint[1].desc;