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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 634E4C7618B for ; Fri, 26 Jul 2019 16:16:20 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id B3CAC218DA for ; Fri, 26 Jul 2019 16:16:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="GhJtb6y3" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B3CAC218DA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-16594-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 29943 invoked by uid 550); 26 Jul 2019 16:16:11 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 29901 invoked from network); 26 Jul 2019 16:16:10 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=9pxdI8Q1eQGc6MFJDXbX8IPKQf5e9FjRtdij/Ccdk+g=; b=GhJtb6y3IvR2euTrzUQLBPzuWpMC1r078nOKLTS2B26A9HymM6QBFZfT03uDUsxGMt qEU5Dj5ZPRoFY2MiQMolT8V6egN2ZpXNx0R/y1ExRSFTnrcIQQkTlH+qisWgVrr+fhu5 fwWtJB/yQ5JNCDew1FsG+XjvLgH1fzf99fEmQ= 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; bh=9pxdI8Q1eQGc6MFJDXbX8IPKQf5e9FjRtdij/Ccdk+g=; b=pjF+ldIyFcp/xHyoYLOzTttNnVIjI/p5PscJTae0jcdqEENQaMy1QUdILaSz8q+ysf tDYyianJbGv+VJ3/AUseHTP+NSfIDSKA3ZPUxL5ZeWFP9pfsGi0esVx8ZVxzSNfFvpGZ uBeKOv02kcXJp4E9Xz3QXBCVLYxQdlcX1fAWVTPLGeH4NgjQ5UuYDxa6rtVd7xMwOtev SR9dOt1Zktj80bm5k18sHxBkB2fLBmvRn5M9zg9NzAI/FNj2L4ETdMjfkHC7ILa1FTbS Ic29+eXEez2tHWpG8TW1rdJV47094vwawloVR9ICcXePxMenHugvNSQBGQpASl0Dd5JM R05Q== X-Gm-Message-State: APjAAAUL9DWRLdZIRBncjvK0l/Ca1JFwafbdWTmbnVPBhrK1YMWE6rph 2W+nizis7n42YsdID7vxo9sCgA== X-Google-Smtp-Source: APXvYqxorBpjLgP/KwuMcH8kC+695azPg68CPTEJ3NXXlbisGsg21F6WBT3zy6Q5jm5oFPVjAt8Owg== X-Received: by 2002:a62:5344:: with SMTP id h65mr23349574pfb.32.1564157758990; Fri, 26 Jul 2019 09:15:58 -0700 (PDT) Date: Fri, 26 Jul 2019 09:15:57 -0700 From: Kees Cook To: Jason Yan Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, diana.craciun@nxp.com, christophe.leroy@c-s.fr, benh@kernel.crashing.org, paulus@samba.org, npiggin@gmail.com, kernel-hardening@lists.openwall.com, linux-kernel@vger.kernel.org, wangkefeng.wang@huawei.com, yebin10@huawei.com, thunder.leizhen@huawei.com, jingxiangfeng@huawei.com, fanchengyang@huawei.com Subject: Re: [RFC PATCH 00/10] implement KASLR for powerpc/fsl_booke/32 Message-ID: <201907260914.E37F9B041@keescook> References: <20190717080621.40424-1-yanaijie@huawei.com> <201907251252.0C58037@keescook> <877d818d-b3ec-1cea-d024-4ad6aea7af60@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <877d818d-b3ec-1cea-d024-4ad6aea7af60@huawei.com> Archived-At: List-Archive: On Fri, Jul 26, 2019 at 03:20:26PM +0800, Jason Yan wrote: > The boot code only maps one 64M zone at early start. If the kernel crosses > two 64M zones, we need to map two 64M zones. Keep the kernel in one 64M > saves a lot of complex codes. Ah-ha. Gotcha. Thanks for the clarification. > Yes, if this feature can be accepted, I will start to work with powerpc64 > KASLR and other things like CONFIG_RANDOMIZE_MEMORY. Awesome. :) -- Kees Cook