From patchwork Mon Sep 21 16:27:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 263575 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=-11.2 required=3.0 tests=BAYES_00,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 03EC7C43466 for ; Mon, 21 Sep 2020 17:02:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC4FB2073A for ; Mon, 21 Sep 2020 17:02:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600707769; bh=z+NouoqugXH7OWzLCOseSUx2VX5kkjXvjD5EupAtSow=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qZPb7GdA/AxPZbAILEyYz6/pitq2eUCugExypVsKp2VS7SGSmyp8QMlb+Dze84YYi zEezY02taQwVrmvdVRXZJjqZPJBlQNUeE6g3V2yis7sCajaFJeT5Ejqqxts4hwJpR1 g214hK7yJyY6jyja1uoR47rN1EISW8HM+Zc7oAh0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729502AbgIURCm (ORCPT ); Mon, 21 Sep 2020 13:02:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:38898 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729079AbgIUQiC (ORCPT ); Mon, 21 Sep 2020 12:38:02 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 4F8EC23998; Mon, 21 Sep 2020 16:38:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600706281; bh=z+NouoqugXH7OWzLCOseSUx2VX5kkjXvjD5EupAtSow=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g2X374Lld6C109XPC+6qIEWKomrQAVkE27ULCCTwoPa6GA4S6WPRy2yrnuxbCU0kO WuvxRRQSUtoWYNprFmpGP1c2yHbV0Qahhe3DCRVprIhqpXqyAKkv3w+M6vbX2gBiXQ 4/fl8E+tpX9IydqXuWKv4JQOZonEibETdY7oTnIk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Rustam Kovhaev , syzbot+22794221ab96b0bab53a@syzkaller.appspotmail.com Subject: [PATCH 4.14 38/94] staging: wlan-ng: fix out of bounds read in prism2sta_probe_usb() Date: Mon, 21 Sep 2020 18:27:25 +0200 Message-Id: <20200921162037.292736558@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200921162035.541285330@linuxfoundation.org> References: <20200921162035.541285330@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Rustam Kovhaev commit fea22e159d51c766ba70473f473a0ec914cc7e92 upstream. let's use usb_find_common_endpoints() to discover endpoints, it does all necessary checks for type and xfer direction remove memset() in hfa384x_create(), because we now assign endpoints in prism2sta_probe_usb() and because create_wlan() uses kzalloc() to allocate hfa384x struct before calling hfa384x_create() Fixes: faaff9765664 ("staging: wlan-ng: properly check endpoint types") Reported-and-tested-by: syzbot+22794221ab96b0bab53a@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=22794221ab96b0bab53a Signed-off-by: Rustam Kovhaev Cc: stable Link: https://lore.kernel.org/r/20200804145614.104320-1-rkovhaev@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wlan-ng/hfa384x_usb.c | 5 ----- drivers/staging/wlan-ng/prism2usb.c | 19 ++++++------------- 2 files changed, 6 insertions(+), 18 deletions(-) --- a/drivers/staging/wlan-ng/hfa384x_usb.c +++ b/drivers/staging/wlan-ng/hfa384x_usb.c @@ -531,13 +531,8 @@ static void hfa384x_usb_defer(struct wor */ void hfa384x_create(struct hfa384x *hw, struct usb_device *usb) { - memset(hw, 0, sizeof(*hw)); hw->usb = usb; - /* set up the endpoints */ - hw->endp_in = usb_rcvbulkpipe(usb, 1); - hw->endp_out = usb_sndbulkpipe(usb, 2); - /* Set up the waitq */ init_waitqueue_head(&hw->cmdq); --- a/drivers/staging/wlan-ng/prism2usb.c +++ b/drivers/staging/wlan-ng/prism2usb.c @@ -61,23 +61,14 @@ static int prism2sta_probe_usb(struct us const struct usb_device_id *id) { struct usb_device *dev; - const struct usb_endpoint_descriptor *epd; - const struct usb_host_interface *iface_desc = interface->cur_altsetting; + struct usb_endpoint_descriptor *bulk_in, *bulk_out; + struct usb_host_interface *iface_desc = interface->cur_altsetting; struct wlandevice *wlandev = NULL; struct hfa384x *hw = NULL; int result = 0; - if (iface_desc->desc.bNumEndpoints != 2) { - result = -ENODEV; - goto failed; - } - - result = -EINVAL; - epd = &iface_desc->endpoint[1].desc; - if (!usb_endpoint_is_bulk_in(epd)) - goto failed; - epd = &iface_desc->endpoint[2].desc; - if (!usb_endpoint_is_bulk_out(epd)) + result = usb_find_common_endpoints(iface_desc, &bulk_in, &bulk_out, NULL, NULL); + if (result) goto failed; dev = interface_to_usbdev(interface); @@ -96,6 +87,8 @@ static int prism2sta_probe_usb(struct us } /* Initialize the hw data */ + hw->endp_in = usb_rcvbulkpipe(dev, bulk_in->bEndpointAddress); + hw->endp_out = usb_sndbulkpipe(dev, bulk_out->bEndpointAddress); hfa384x_create(hw, dev); hw->wlandev = wlandev;