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 593A2FA3728 for ; Wed, 16 Oct 2019 22:19:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 30EB2207FF for ; Wed, 16 Oct 2019 22:19:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571264394; bh=ChfEVbx/mpk2KVxURUhdYDOF/BWXuLYcX9yTbqacXOI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dSSBryeqYyohCGXu0Q6/VUrdVv9vmBARrNFXDWy+U1Xq32uNnR41GaQJBAfzyMLnu fYyjzHg06pU2VxTUpcW8trJCsHq4MX6xwP9LxFygsSvn1OmH4ZBqll4FWiDdmCp0Ek 7w5cP3BAuqKrBxDNkZFzAtXA0BpgNgObx9duccIo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405694AbfJPWTx (ORCPT ); Wed, 16 Oct 2019 18:19:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:43452 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2437625AbfJPVx7 (ORCPT ); Wed, 16 Oct 2019 17:53:59 -0400 Received: from localhost (unknown [192.55.54.58]) (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 043F8222BD; Wed, 16 Oct 2019 21:53:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571262839; bh=ChfEVbx/mpk2KVxURUhdYDOF/BWXuLYcX9yTbqacXOI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mwtFIqxNYstUxQXGhdZjfyinj36JpdNjaVRC6ZvlFNUXQ6zWyUnmYkxkvclQ55wzn JSr0Li3jKWC0dpH78yHCUhC+YywAh+VTXarEouMjQrDTwQ0BSbqLMX6p13TjxABCAn YCGIpAvP6NSTJghA4fuR/35J0SQhsvJ+l+MknOiE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold Subject: [PATCH 4.4 44/79] USB: iowarrior: fix use-after-free after driver unbind Date: Wed, 16 Oct 2019 14:50:19 -0700 Message-Id: <20191016214806.597352224@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191016214729.758892904@linuxfoundation.org> References: <20191016214729.758892904@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: Johan Hovold commit b5f8d46867ca233d773408ffbe691a8062ed718f upstream. Make sure to stop also the asynchronous write URBs on disconnect() to avoid use-after-free in the completion handler after driver unbind. Fixes: 946b960d13c1 ("USB: add driver for iowarrior devices.") Cc: stable # 2.6.21: 51a2f077c44e ("USB: introduce usb_anchor") Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20191009104846.5925-4-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/iowarrior.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/usb/misc/iowarrior.c +++ b/drivers/usb/misc/iowarrior.c @@ -89,6 +89,7 @@ struct iowarrior { char chip_serial[9]; /* the serial number string of the chip connected */ int report_size; /* number of bytes in a report */ u16 product_id; + struct usb_anchor submitted; }; /*--------------*/ @@ -437,11 +438,13 @@ static ssize_t iowarrior_write(struct fi retval = -EFAULT; goto error; } + usb_anchor_urb(int_out_urb, &dev->submitted); retval = usb_submit_urb(int_out_urb, GFP_KERNEL); if (retval) { dev_dbg(&dev->interface->dev, "submit error %d for urb nr.%d\n", retval, atomic_read(&dev->write_busy)); + usb_unanchor_urb(int_out_urb); goto error; } /* submit was ok */ @@ -788,6 +791,8 @@ static int iowarrior_probe(struct usb_in iface_desc = interface->cur_altsetting; dev->product_id = le16_to_cpu(udev->descriptor.idProduct); + init_usb_anchor(&dev->submitted); + /* set up the endpoint information */ for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { endpoint = &iface_desc->endpoint[i].desc; @@ -917,6 +922,7 @@ static void iowarrior_disconnect(struct Deleting the device is postponed until close() was called. */ usb_kill_urb(dev->int_in_urb); + usb_kill_anchored_urbs(&dev->submitted); wake_up_interruptible(&dev->read_wait); wake_up_interruptible(&dev->write_wait); mutex_unlock(&dev->mutex);