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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,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 6AADFCA9EA0 for ; Fri, 18 Oct 2019 22:12:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2DAF821D7C for ; Fri, 18 Oct 2019 22:12:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571436726; bh=1YLX4e/jxIKXRGsVefwQ0XUeA7BhjR/rmUKFMynZr/M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EduuKoIyD/nlrjOiccHeVQpLhH8K7rLED9ZwA9RQpN4dDrCo9/fNg/upVquPgtZbx BwfHQlRQjMJWGQuoy89sAfXHjZLYAmD4M+q8P9IKa/IuwTY48WuiIrGKHcrDkM+qzX 3JAqN+EGd89kJV7sCVoBdQP+9trFl7LEiSuLqU7o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390095AbfJRWK0 (ORCPT ); Fri, 18 Oct 2019 18:10:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:42882 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389648AbfJRWKE (ORCPT ); Fri, 18 Oct 2019 18:10:04 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E188322478; Fri, 18 Oct 2019 22:10:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571436603; bh=1YLX4e/jxIKXRGsVefwQ0XUeA7BhjR/rmUKFMynZr/M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Oyc0y032Flj6nuAwV7VarMxsAfAtgvzUhoUg+ktzhYHwKPZ501O+OFpYm4DWpMLqe yrJJ9YF9j85cwl69jyOcsNc0YXtCn/OU9jVDoImyBN2pieFSLtdXQH+v5+Nc5udH/4 tDqK34yxn1U4HgubPM/Qev9lRhcZUblTSs3iXi/w= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Johan Hovold , Greg Kroah-Hartman , Sasha Levin , linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 26/29] USB: usb-skeleton: fix use-after-free after driver unbind Date: Fri, 18 Oct 2019 18:09:17 -0400 Message-Id: <20191018220920.10545-26-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191018220920.10545-1-sashal@kernel.org> References: <20191018220920.10545-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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 [ Upstream commit 6353001852776e7eeaab4da78922d4c6f2b076af ] The driver failed to stop its read URB on disconnect, something which could lead to a use-after-free in the completion handler after driver unbind in case the character device has been closed. Fixes: e7389cc9a7ff ("USB: skel_read really sucks royally") Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20191009170944.30057-3-johan@kernel.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/usb-skeleton.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c index 5133a0792eb04..afe516935d73f 100644 --- a/drivers/usb/usb-skeleton.c +++ b/drivers/usb/usb-skeleton.c @@ -585,6 +585,7 @@ static void skel_disconnect(struct usb_interface *interface) dev->interface = NULL; mutex_unlock(&dev->io_mutex); + usb_kill_urb(dev->bulk_in_urb); usb_kill_anchored_urbs(&dev->submitted); /* decrement our usage count */ -- 2.20.1