From patchwork Tue Sep 15 14:13:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 263822 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=-12.7 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 02F19C43461 for ; Wed, 16 Sep 2020 00:20:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C13E9206DC for ; Wed, 16 Sep 2020 00:20:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600215649; bh=pCBvSXjdFSNruoREIYXKJX/RrFIqCbHWfElkQ0Rqpqk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=AdkcEUoCSNuxVq/mGOZvdzFqKJqn5rEsA+e4+WWo7kZomJQcaI5kaITbOl2CLet7o yhH0cj9I2m3rt1U8G61IL+Lq5QfefSc1sBDxv9oQaisu9tRDM+xPEm4BX49Vqqnkv7 ALsKdoCdvPhYDivIeaK/LcV0GyTyyzDsIwR2Xsls= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727007AbgIPAUo (ORCPT ); Tue, 15 Sep 2020 20:20:44 -0400 Received: from mail.kernel.org ([198.145.29.99]:60984 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726860AbgIOOVg (ORCPT ); Tue, 15 Sep 2020 10:21:36 -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 5F7992224E; Tue, 15 Sep 2020 14:17:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600179426; bh=pCBvSXjdFSNruoREIYXKJX/RrFIqCbHWfElkQ0Rqpqk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k7ncpkg1HDSW4XJXHFKCkXCD3aAPJJtxXAlaljP7+0DxhRmwM8/h9SVoNbHG+vifJ P0vl9n2IGdQFfufY+mnNnGxdfPCT5wcc1Zxm04SbiIEoAxJ3UXnlL8l0xHfpBzIDJA sXRD9+Lv6A+w2Jtwz0JFtji18J86CoAN1uieIMb0= 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 4.19 54/78] staging: wlan-ng: fix out of bounds read in prism2sta_probe_usb() Date: Tue, 15 Sep 2020 16:13:19 +0200 Message-Id: <20200915140636.283994689@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200915140633.552502750@linuxfoundation.org> References: <20200915140633.552502750@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org 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 @@ -532,13 +532,8 @@ 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;