Received: by 10.192.165.148 with SMTP id m20csp4371621imm; Tue, 8 May 2018 07:27:54 -0700 (PDT) X-Google-Smtp-Source: AB8JxZrIW0ztlzOYHa9PjKJYboQKqX1Wwrf9wihxcR6w9/251WjdTxvvJJmFVOR/KhBUXLxjsUCc X-Received: by 10.98.11.3 with SMTP id t3mr40433401pfi.32.1525789674289; Tue, 08 May 2018 07:27:54 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1525789674; cv=none; d=google.com; s=arc-20160816; b=JiLic1knmGvBFi10z1ZY/1rD2rIr3kaWUyK1FkaOVXJA2uPP4ajIxJpuseUIBC+RTE y8Rzyn2gldUCfc7NcDss9MjDXmuY32rJHzMhSQcn4h0/ECuxVJXwKNVPu2zT3g+6W4Zn OBYbzz7savM1S46qDb/07j5pY92iwpxhdAKQ0zby7MUGCDS63YoPSUcGrYztChraWXz8 hBIRSOCIB7sZww8jZQcf1YHkoXxkGL9nWe4wXs/HQCq94LlQDE0SezlhwXRlAsFsuZUn 1PjeEJnSohwfpUsmOj4hJpvRhresMa2UZqSpFc0xi1PGwkN/7MP6YBqmOHVAoypbswDP 9gDA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:arc-authentication-results; bh=24wSUj1TShibaPnxZXvGcyY4lBw7PGxSSNROSY0M4vg=; b=xQZ0gbNSr4lQz5G56KqxhPKB59jstBNaxoh/BueyPdQIXfb1+NsbNV1dqs72d5q3u2 +T5siSkYI44fNGNLhIpynx7yKbWrWsv4IVs9mgogcESNxauZYt2kmraIgx0IJpWG2DG6 PKUX+260lY5yfPquCnvOJz22cR6Xt7pYoVRm0Lxs9gQ4HmeJtagLv32mq+/GP7N4q3l0 8w8sHkjvyZLkYC0XQiLescf5rspn0fKXkRUxnSXRoT9YF5qj2C1x/s5sLsbo+ScDuXQu c7zpuXddWayz+jIVnTY8LHwf841fk8j9zBpdeFGiIzu0Lgl7zDWmvwm/qdQTTvFIt11W epSQ== 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; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=canonical.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id o2-v6si19934204pgn.409.2018.05.08.07.27.39; Tue, 08 May 2018 07:27:54 -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; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=canonical.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932487AbeEHO1G (ORCPT + 99 others); Tue, 8 May 2018 10:27:06 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:35014 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932376AbeEHO1F (ORCPT ); Tue, 8 May 2018 10:27:05 -0400 Received: from 201-93-76-46.dial-up.telesp.net.br ([201.93.76.46] helo=calabresa) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1fG3a3-00048Q-Ke; Tue, 08 May 2018 14:27:04 +0000 Date: Tue, 8 May 2018 11:27:00 -0300 From: Thadeu Lima de Souza Cascardo To: Dave Hansen Cc: linux-kernel@vger.kernel.org Subject: Re: Problem with global pages changeset and kvm Message-ID: <20180508142659.GB3402@calabresa> References: <20180508093723.GA4529@calabresa> <137272d9-9c30-3b28-0903-07add5e2036b@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <137272d9-9c30-3b28-0903-07add5e2036b@linux.intel.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 08, 2018 at 07:15:06AM -0700, Dave Hansen wrote: > 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? No, there are multiple oopses, the last one includes init, which makes the guest panic. I can boot it if I add nopti to the guest command line. Cascardo.