Received: by 2002:ac0:a5b6:0:0:0:0:0 with SMTP id m51-v6csp37786imm; Thu, 7 Jun 2018 13:22:15 -0700 (PDT) X-Google-Smtp-Source: ADUXVKKYry5+cLEQXBbns8tRcWY6hag7On/VaMbeOUStrVL0rR5fZuT/XNgQ60uJeboYcmhuzRNg X-Received: by 2002:a62:e816:: with SMTP id c22-v6mr3073985pfi.124.1528402935526; Thu, 07 Jun 2018 13:22:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1528402935; cv=none; d=google.com; s=arc-20160816; b=twZ8dUJJ9L3TrLh0fpoZ0iXi/Z4KoSpA86Yv/2srRYte6ABA81EIm1ceaXrflfRYgp WjET2YozfoUCBE1FkFr+cj1A/08BoYe4xAKhWu42IYcmr78F1+PYbv6/IInUEVkED20x E3KcEy758FwitB1gu5KXeAg+XPCxlMYINJKBMb/ul3lzRy70NQ0EMqtxq7hFoclMn8Do gcYgcwQCzOxYyv+rtgza9DFmAY5ze05uc6AAaBMlwArVva3Yq/2mUYZ2JtntjQYTaW2T PfypqylDD6tG0cnG4BA0bsHeerH4heDQrJLfbEHdQgwhwvy9fv4luDCJNH5iSK4ZeF/j 8jNg== 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:mime-version :references:in-reply-to:date:cc:to:from:subject:message-id :arc-authentication-results; bh=PI75qUd5xxhoaQytclfBT7LIxMPSMjg4xjWJKqDxZxs=; b=G8fisbbghLaopNVmtKv7K8CcmZRZnuvEHFGw+nk/HgNlc3XbuQxpNOk8lezxNN0xeB cBGpwjETBhYhuIoNm8vFoIDshLhnYZHg4AxOHsb+v3aKF6vYMNcDNkIcRpyuTw381qZT 6EZ2LGaOhJhk1YOKQkUni/7Ty4y2CDjfT/8Hfjbt4W89QAYL6CnJAfIdKlAyz1wuRUhJ eQfwE+KfCIlahwsg8GJzKvRvg+APfBcaYFrw4WkCTwxNQv7egXq8WTS06JQXD1ciQkNZ vLikelFXwhkKzsMYEXll5Z4xNvdMgHjFhSlPY0Wi8ugbeWIidIXJciZy2ApcJujFEA/c w6lA== 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=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 189-v6si16708520pfg.163.2018.06.07.13.21.59; Thu, 07 Jun 2018 13:22:15 -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=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753426AbeFGUV3 (ORCPT + 99 others); Thu, 7 Jun 2018 16:21:29 -0400 Received: from mga09.intel.com ([134.134.136.24]:54680 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753028AbeFGUV2 (ORCPT ); Thu, 7 Jun 2018 16:21:28 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 07 Jun 2018 13:21:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,487,1520924400"; d="scan'208";a="235321084" Received: from 2b52.sc.intel.com (HELO [143.183.136.51]) ([143.183.136.51]) by fmsmga005.fm.intel.com with ESMTP; 07 Jun 2018 13:21:26 -0700 Message-ID: <1528402695.5265.24.camel@2b52.sc.intel.com> Subject: Re: [PATCH 08/10] mm: Prevent mremap of shadow stack From: Yu-cheng Yu To: Andy Lutomirski Cc: LKML , linux-doc@vger.kernel.org, Linux-MM , linux-arch , X86 ML , "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , "H. J. Lu" , "Shanbhogue, Vedvyas" , "Ravi V. Shankar" , Dave Hansen , Jonathan Corbet , Oleg Nesterov , Arnd Bergmann , mike.kravetz@oracle.com Date: Thu, 07 Jun 2018 13:18:15 -0700 In-Reply-To: References: <20180607143807.3611-1-yu-cheng.yu@intel.com> <20180607143807.3611-9-yu-cheng.yu@intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2018-06-07 at 11:48 -0700, Andy Lutomirski wrote: > On Thu, Jun 7, 2018 at 7:41 AM Yu-cheng Yu wrote: > > > > Signed-off-by: Yu-cheng Yu > > Please justify. This seems actively harmful to me. I will remove this patch.