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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 0F96FCA9EAB for ; Mon, 21 Oct 2019 03:35:33 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id 627882190F for ; Mon, 21 Oct 2019 03:35:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 627882190F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-17067-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 21633 invoked by uid 550); 21 Oct 2019 03:35:25 -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 21601 invoked from network); 21 Oct 2019 03:35:24 -0000 Subject: Re: [PATCH v7 00/12] implement KASLR for powerpc/fsl_booke/32 To: Scott Wood , , , , , , , , , CC: , , , , , References: <20190920094546.44948-1-yanaijie@huawei.com> <9c2dd2a8-83f2-983c-383e-956e19a7803a@huawei.com> <38141b946f3376ce471e46eaf065e357ac540354.camel@buserror.net> <90bb659a-bde4-3b8e-8f01-bf22d7534f44@huawei.com> <34ef1980887c8a6d635c20bdaf748bb0548e51b5.camel@buserror.net> From: Jason Yan Message-ID: <0543af6f-df4a-81ff-41fe-c81959568859@huawei.com> Date: Mon, 21 Oct 2019 11:34:59 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 MIME-Version: 1.0 In-Reply-To: <34ef1980887c8a6d635c20bdaf748bb0548e51b5.camel@buserror.net> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.96.203] X-CFilter-Loop: Reflected On 2019/10/10 2:46, Scott Wood wrote: > On Wed, 2019-10-09 at 16:41 +0800, Jason Yan wrote: >> Hi Scott, >> >> On 2019/10/9 15:13, Scott Wood wrote: >>> On Wed, 2019-10-09 at 14:10 +0800, Jason Yan wrote: >>>> Hi Scott, >>>> >>>> Would you please take sometime to test this? >>>> >>>> Thank you so much. >>>> >>>> On 2019/9/24 13:52, Jason Yan wrote: >>>>> Hi Scott, >>>>> >>>>> Can you test v7 to see if it works to load a kernel at a non-zero >>>>> address? >>>>> >>>>> Thanks, >>> >>> Sorry for the delay. Here's the output: >>> >> >> Thanks for the test. >> >>> ## Booting kernel from Legacy Image at 10000000 ... >>> Image Name: Linux-5.4.0-rc2-00050-g8ac2cf5b4 >>> Image Type: PowerPC Linux Kernel Image (gzip compressed) >>> Data Size: 7521134 Bytes = 7.2 MiB >>> Load Address: 04000000 >>> Entry Point: 04000000 >>> Verifying Checksum ... OK >>> ## Flattened Device Tree blob at 1fc00000 >>> Booting using the fdt blob at 0x1fc00000 >>> Uncompressing Kernel Image ... OK >>> Loading Device Tree to 07fe0000, end 07fff65c ... OK >>> KASLR: No safe seed for randomizing the kernel base. >>> OF: reserved mem: initialized node qman-fqd, compatible id fsl,qman-fqd >>> OF: reserved mem: initialized node qman-pfdr, compatible id fsl,qman-pfdr >>> OF: reserved mem: initialized node bman-fbpr, compatible id fsl,bman-fbpr >>> Memory CAM mapping: 64/64/64 Mb, residual: 12032Mb >> >> When boot from 04000000, the max CAM value is 64M. And >> you have a board with 12G memory, CONFIG_LOWMEM_CAM_NUM=3 means only >> 192M memory is mapped and when kernel is randomized at the middle of >> this 192M memory, we will not have enough continuous memory for node map. >> >> Can you set CONFIG_LOWMEM_CAM_NUM=8 and see if it works? > > OK, that worked. > Hi Scott, any more cases should be tested or any more comments? What else need to be done before this feature can be merged? Thanks, Jason > -Scott > > > > . >