Received: by 10.192.165.148 with SMTP id m20csp4360152imm; Tue, 8 May 2018 07:17:00 -0700 (PDT) X-Google-Smtp-Source: AB8JxZqh2q53HvgVUeRC13ezW14Il/dGZkgUThIN6h4sdgagYemag7UbT/hm7ihGhI/91LwwNvGU X-Received: by 2002:a63:b144:: with SMTP id g4-v6mr32826089pgp.253.1525789020428; Tue, 08 May 2018 07:17:00 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1525789020; cv=none; d=google.com; s=arc-20160816; b=MvTBj7TYeN6F8XC0j6kiFfCoxn4YmsdcEwxGzR75kn7HdyKBOyOf73KtUndTt4ST+N Y08TPb9hluezIsweamQA2voOY/FTCXMQX1SafsBiS/+qlJC9CKyurACYj1/JGV+BHCZH 6QvqBpe3KR3dfeUGZ4WTzFraHUsWHEnwyewr2K9aj+4EaGFJ89+BxI2w0So2NZPZkXTL iOJobZGZHWDuBU0ckqOAw2kkPuBkZ+i6PJjY7ZU1tdnj8rlqYMRq94OiB85VH5nUr59C Pjbk/+Sp6tuY5yFyCNXP32Rh73qQsvckrAZbfcNc7uMSs0795Mkajc8TAAlZkcXbfDiy GRqg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:openpgp:from:references:to:subject :arc-authentication-results; bh=hZK/vQCY/TwPslmATQf1k/RBnC3sZzDV6m9Aji3WfR8=; b=invgIoYRxP3LpMLK/25Nb5gVabmWZEOQDzNAp0nfmPbEWrxuyziiNo0POabC10WEf7 OkVERwhoYFjqHjdpeOz+s38LQ+sCd4C7fC5JsHCiwBDPurqLebJkaDzrosrUouvRa1b7 0KcgYxU6qdVylhzj2ULWVNRcskMP33yLer0gFhKuJbCPgCVEaeUnXFDIsmHGHjSUPYD9 NtdsGe4274eryEsmOyO+hjxx27MJqTIo1uROyGM6eizYMiV8Gh+zafRlkQIgyJ6CYtRY +83eCyLdP/znYqr3HABZLSjxseV1IpAXt6nqamCunD/Iiw2ugOBtnRDstEHFl5L4fN5m roYQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id w127si24201152pfd.313.2018.05.08.07.16.45; Tue, 08 May 2018 07:17:00 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755368AbeEHOPH (ORCPT + 99 others); Tue, 8 May 2018 10:15:07 -0400 Received: from mga11.intel.com ([192.55.52.93]:22312 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752252AbeEHOPG (ORCPT ); Tue, 8 May 2018 10:15:06 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 May 2018 07:15:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,378,1520924400"; d="scan'208";a="47651433" Received: from achand8-mobl1.amr.corp.intel.com (HELO [10.252.142.242]) ([10.252.142.242]) by FMSMGA003.fm.intel.com with ESMTP; 08 May 2018 07:15:06 -0700 Subject: Re: Problem with global pages changeset and kvm To: Thadeu Lima de Souza Cascardo , linux-kernel@vger.kernel.org References: <20180508093723.GA4529@calabresa> From: Dave Hansen Openpgp: preference=signencrypt Message-ID: <137272d9-9c30-3b28-0903-07add5e2036b@linux.intel.com> Date: Tue, 8 May 2018 07:15:06 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180508093723.GA4529@calabresa> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Thanks for the excellent bug report! On 05/08/2018 02:37 AM, Thadeu Lima de Souza Cascardo wrote: > 2) The bad address is next to do_syscall_64 on the host. So a host address leaked into a guest oops? We should bring the KVM folks into this and probably also need to widen the cc list quite a bit. Can you boot the guest at all?