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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 EF95EC3524C for ; Sun, 2 Feb 2020 21:56:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BAE602082F for ; Sun, 2 Feb 2020 21:56:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580680604; bh=h2AnbZ1zvtdRaW+7VGG5Kg0L6L5dvbqhPoz41PUcXgI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=IUG9y5B7+fwigJhpX3nwqnlmwLfdd6Lq/cw+P/3E8xtzexivB/C/vtiXGMG1lx1Xy 8YhJ82PZkpRpv+u9gk8LyT7hC4MKwOG571i0WKXW1rPPOIP9YVfXmTEsKjXXXvlSXS LQOMdaRzRyazVpB+ywuYYyJUBD/6vGBOnnprsfkM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727066AbgBBV4o (ORCPT ); Sun, 2 Feb 2020 16:56:44 -0500 Received: from mail.kernel.org ([198.145.29.99]:42652 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726967AbgBBV4n (ORCPT ); Sun, 2 Feb 2020 16:56:43 -0500 Received: from localhost (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (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 03A242051A; Sun, 2 Feb 2020 21:56:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580680603; bh=h2AnbZ1zvtdRaW+7VGG5Kg0L6L5dvbqhPoz41PUcXgI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ZARAdc5PDLtY/d96QpMLrHJEesapUwh7y5PLycAJoRcTHsr19LV6+0kreNhrSj6h3 P4pbKyALeE508v09vQ7dHjHo6LoO5nNE9cs47QJLooSO4K42X3koSzI/KPI3r4URpA 6BxH/qeVLAHTDUR+gciLM6X1HWf5256yxYz+IMaQ= Date: Sun, 2 Feb 2020 16:56:41 -0500 From: Sasha Levin To: Xiaochen Shen Cc: stable@vger.kernel.org, gregkh@linuxfoundation.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, tony.luck@intel.com, fenghua.yu@intel.com, reinette.chatre@intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, pei.p.jia@intel.com, Borislav Petkov Subject: Re: [PATCH 4.19 1/3] x86/resctrl: Fix use-after-free when deleting resource groups Message-ID: <20200202215641.GB1732@sasha-vm> References: <1578500886-21771-1-git-send-email-xiaochen.shen@intel.com> <1580594537-2972-1-git-send-email-xiaochen.shen@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <1580594537-2972-1-git-send-email-xiaochen.shen@intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Feb 02, 2020 at 06:02:17AM +0800, Xiaochen Shen wrote: >commit b8511ccc75c033f6d54188ea4df7bf1e85778740 upstream. > >A resource group (rdtgrp) contains a reference count (rdtgrp->waitcount) >that indicates how many waiters expect this rdtgrp to exist. Waiters >could be waiting on rdtgroup_mutex or some work sitting on a task's >workqueue for when the task returns from kernel mode or exits. I've queued up the 4.19 and 4.14 backports, thanks! -- Thanks, Sasha