From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3C218C43603 for ; Thu, 19 Dec 2019 19:11:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 10A122467E for ; Thu, 19 Dec 2019 19:11:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576782681; bh=3TWcu9/vsPKBynX4OuH3lh8x9lLJu48NKdQdI7KMP8E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ggKp3U6rbaAv2Q/VPs5wufKEHqTWgLcJbuni/DmZ2Lhr1JoMtJaRDla0hFg41/gii 5mTr4Y5oEaxhXhOLfLyFLZFs4ho8n614iZ15u+WtvLd7henXY98/x+ytqt+BZPNjhY apaU7l89eHjrE3l50fzSAQPj06HbgZIjcBnxSN4U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727505AbfLSSib (ORCPT ); Thu, 19 Dec 2019 13:38:31 -0500 Received: from mail.kernel.org ([198.145.29.99]:56506 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726840AbfLSSia (ORCPT ); Thu, 19 Dec 2019 13:38:30 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A651D20716; Thu, 19 Dec 2019 18:38:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576780710; bh=3TWcu9/vsPKBynX4OuH3lh8x9lLJu48NKdQdI7KMP8E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=na4aEdpVcfcHc1kAjrbENQia3R21v5usnEIX/OIpAtdXCWKgEypR0VvOv9KvcDrv+ 5KgIrVvQaZhPAbcCLZ+YXE07+mLYWGl69Ev0/03Sn/m1lu6n5pQvFejslGMfi5DS4F QoQrzoconsVxFF6H4SxYEg5EFHNOePJpGjH/Tjg4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+35b1c403a14f5c89eba7@syzkaller.appspotmail.com, Hansjoerg Lipp , Tilman Schmidt , Johan Hovold Subject: [PATCH 4.4 086/162] staging: gigaset: fix general protection fault on probe Date: Thu, 19 Dec 2019 19:33:14 +0100 Message-Id: <20191219183213.025639432@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191219183150.477687052@linuxfoundation.org> References: <20191219183150.477687052@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johan Hovold commit 53f35a39c3860baac1e5ca80bf052751cfb24a99 upstream. Fix a general protection fault when accessing the endpoint descriptors which could be triggered by a malicious device due to missing sanity checks on the number of endpoints. Reported-by: syzbot+35b1c403a14f5c89eba7@syzkaller.appspotmail.com Fixes: 07dc1f9f2f80 ("[PATCH] isdn4linux: Siemens Gigaset drivers - M105 USB DECT adapter") Cc: stable # 2.6.17 Cc: Hansjoerg Lipp Cc: Tilman Schmidt Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20191202085610.12719-2-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/isdn/gigaset/usb-gigaset.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/isdn/gigaset/usb-gigaset.c +++ b/drivers/isdn/gigaset/usb-gigaset.c @@ -688,6 +688,11 @@ static int gigaset_probe(struct usb_inte return -ENODEV; } + if (hostif->desc.bNumEndpoints < 2) { + dev_err(&interface->dev, "missing endpoints\n"); + return -ENODEV; + } + dev_info(&udev->dev, "%s: Device matched ... !\n", __func__); /* allocate memory for our device state and initialize it */