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=-6.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_NEOMUTT autolearn=ham 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 A2D87C43381 for ; Tue, 12 Mar 2019 07:39:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6AAA52147C for ; Tue, 12 Mar 2019 07:39:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=shutemov-name.20150623.gappssmtp.com header.i=@shutemov-name.20150623.gappssmtp.com header.b="blbB8jjf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727446AbfCLHj4 (ORCPT ); Tue, 12 Mar 2019 03:39:56 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:33402 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726614AbfCLHj4 (ORCPT ); Tue, 12 Mar 2019 03:39:56 -0400 Received: by mail-pg1-f195.google.com with SMTP id h11so1197125pgl.0 for ; Tue, 12 Mar 2019 00:39:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shutemov-name.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=dtBQTLJH4XIW9A5l2bEldda5MgmOrBYw4b20dV2Mnts=; b=blbB8jjfvMX3sbrmLAM0lEzjlSCbPqSLKmLnv/Hc7fwRGI5Gps89s9513PxB71vvoE BMbSnXnW9aOW3qVWIBipRnWJlHO7QRqPxIWEt4TfnithpRrK94xlFHdfodP+8TXNj7vM GYNl3I89uoj0ilGyUB7q6UC9EZ5s3mb7bDFJee4p8H5rnjAxfaIY5LLzEZEntMzDucvd 9J4lufapufePN7HpkYUMsLb8njjdMUZ912+1+z5EY/ZW1Kv5Pz7XK8IT2IWU+NfToR5v JCY+4nXw//aVuv42S55N1uKFnP7HrySVb7A/hki2lc/z5xknI5AxSSMiJt+B+qy1hJYU jWdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=dtBQTLJH4XIW9A5l2bEldda5MgmOrBYw4b20dV2Mnts=; b=scAhSF+rFYgZSvropftiK1t1orXaGaFeN8uitGT1AV/vj9qZ5rX5xJghibz9FxLnZs AkGOBYiBBKRh1UwrRcEeF8EB/4dJ9Kk9um8f6qnp2vS7tgJcQy3MYONTMe2qut/mFQbA rNzixd7PaaEIz8EeVqNYDA2j4Z56wotLnby+Dkz4joLF02AUtVwrB72jb9baIvdHLf7R 72McfvJlcmfbmMu8iZ8cpWJMbblhvmD1uGYpJajxldQeghhqxYbl9HkWUMy3Qly8Kt+w WN+Z8+qogGQuqzNz0rEEqnsi7nM3C8wuiUMF3xiGA3OfiOmtZgUjsp0Nz4lXkBeQSmXA 66WQ== X-Gm-Message-State: APjAAAVXm0a0MGPoiKj/7bff0haCdsO916nCsYCPhr7mvGc65DYgCnfr cRj+g/21sJYdfUaK17Cm3GNpBw== X-Google-Smtp-Source: APXvYqwHnyb8CrmuFZI1pS9+dmo/Ml+MMKdG9jq8uB1XjKOynpwD2wD4JPuJABXXwZi2H3dgFfET+g== X-Received: by 2002:a62:ae0b:: with SMTP id q11mr37351335pff.199.1552376396008; Tue, 12 Mar 2019 00:39:56 -0700 (PDT) Received: from kshutemo-mobl1.localdomain (fmdmzpr04-ext.fm.intel.com. [192.55.54.39]) by smtp.gmail.com with ESMTPSA id m3sm9319299pgp.85.2019.03.12.00.39.55 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 12 Mar 2019 00:39:55 -0700 (PDT) Received: by kshutemo-mobl1.localdomain (Postfix, from userid 1000) id 1D70E3011CA; Tue, 12 Mar 2019 10:39:53 +0300 (+03) Date: Tue, 12 Mar 2019 10:39:53 +0300 From: "Kirill A. Shutemov" To: Baoquan He Cc: linux-kernel@vger.kernel.org, kirill.shutemov@linux.intel.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org, keescook@chromium.org, thgarnie@google.com Subject: Re: [PATCH v3 2/2] x86/mm/KASLR: Change the granularity of randomization to PUD size in 5-level Message-ID: <20190312073953.zctjqb425e355ktz@kshutemo-mobl1> References: <20190308025616.21440-1-bhe@redhat.com> <20190308025616.21440-3-bhe@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190308025616.21440-3-bhe@redhat.com> User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 08, 2019 at 10:56:16AM +0800, Baoquan He wrote: > The current randomization granularity of 5-level is 512 GB. Improve > it to 1 GB. This can add more randomness to memory region KASLR in > 5-level paging mode > > Signed-off-by: Baoquan He Acked-by: Kirill A. Shutemov -- Kirill A. Shutemov