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,URIBL_BLOCKED,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 4268BC2BA83 for ; Thu, 13 Feb 2020 16:07:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1010220656 for ; Thu, 13 Feb 2020 16:07:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581610054; bh=rUcEVU3gBhjHwiVrzHGmMtspZDVT+yVIgYlJpo9qhi0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=laNCattlx+Vz8aeWf+YuaEEXKXjB0bPucE/47G/L+y8vIP7Hg7pGGiWn1eOA5g0Ez sPrkrcXX92iX7Sxo0eh24jWIYVWXboX5yF/+ZnzjOTw+OwTIgjO3AhYF5WeoszKnch WTw65B0b5r3Do/mxf0dCqipX9HoAZfsF1PIEqrKg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730221AbgBMQHc (ORCPT ); Thu, 13 Feb 2020 11:07:32 -0500 Received: from mail.kernel.org ([198.145.29.99]:34336 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727777AbgBMPXV (ORCPT ); Thu, 13 Feb 2020 10:23:21 -0500 Received: from localhost (unknown [104.132.1.104]) (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 9839A246C0; Thu, 13 Feb 2020 15:23:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581607400; bh=rUcEVU3gBhjHwiVrzHGmMtspZDVT+yVIgYlJpo9qhi0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DjWUBDFJuXz77d7shfDt4/agI2E4GGI38anVM1Uc8tyht6Su/lgkXmKcM85DhSc6T SQ/XeW/WHqPpaQ/A6FQs0VRSpAQY5WdTs+2SB9PvgPyoY0hUGNt0SbEzKJrhZef4LE TqbnvV0D6BVK0aVjaNmIsNoKaVmmak3ghC4CcExA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Oliver Neukum , Lee Jones , syzbot+48a2851be24583b864dc@syzkaller.appspotmail.com Subject: [PATCH 4.9 016/116] mfd: dln2: More sanity checking for endpoints Date: Thu, 13 Feb 2020 07:19:20 -0800 Message-Id: <20200213151849.286887601@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200213151842.259660170@linuxfoundation.org> References: <20200213151842.259660170@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Oliver Neukum commit 2b8bd606b1e60ca28c765f69c1eedd7d2a2e9dca upstream. It is not enough to check for the number of endpoints. The types must also be correct. Reported-and-tested-by: syzbot+48a2851be24583b864dc@syzkaller.appspotmail.com Signed-off-by: Oliver Neukum Reviewed-by: Greg Kroah-Hartman Signed-off-by: Lee Jones Signed-off-by: Greg Kroah-Hartman --- drivers/mfd/dln2.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) --- a/drivers/mfd/dln2.c +++ b/drivers/mfd/dln2.c @@ -729,6 +729,8 @@ static int dln2_probe(struct usb_interfa const struct usb_device_id *usb_id) { struct usb_host_interface *hostif = interface->cur_altsetting; + struct usb_endpoint_descriptor *epin; + struct usb_endpoint_descriptor *epout; struct device *dev = &interface->dev; struct dln2_dev *dln2; int ret; @@ -738,12 +740,19 @@ static int dln2_probe(struct usb_interfa hostif->desc.bNumEndpoints < 2) return -ENODEV; + epin = &hostif->endpoint[0].desc; + epout = &hostif->endpoint[1].desc; + if (!usb_endpoint_is_bulk_out(epout)) + return -ENODEV; + if (!usb_endpoint_is_bulk_in(epin)) + return -ENODEV; + dln2 = kzalloc(sizeof(*dln2), GFP_KERNEL); if (!dln2) return -ENOMEM; - dln2->ep_out = hostif->endpoint[0].desc.bEndpointAddress; - dln2->ep_in = hostif->endpoint[1].desc.bEndpointAddress; + dln2->ep_out = epout->bEndpointAddress; + dln2->ep_in = epin->bEndpointAddress; dln2->usb_dev = usb_get_dev(interface_to_usbdev(interface)); dln2->interface = interface; usb_set_intfdata(interface, dln2);