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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS 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 756E0C43381 for ; Wed, 27 Feb 2019 04:01:26 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A92B9218CD for ; Wed, 27 Feb 2019 04:01:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A92B9218CD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 448MS34T9XzDqL8 for ; Wed, 27 Feb 2019 15:01:23 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=linux.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=stewart@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 448MQ958dczDqHp for ; Wed, 27 Feb 2019 14:59:44 +1100 (AEDT) Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x1R3xFwj000609 for ; Tue, 26 Feb 2019 22:59:40 -0500 Received: from e31.co.us.ibm.com (e31.co.us.ibm.com [32.97.110.149]) by mx0a-001b2d01.pphosted.com with ESMTP id 2qwfn0re1g-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 26 Feb 2019 22:59:39 -0500 Received: from localhost by e31.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 27 Feb 2019 03:59:37 -0000 Received: from b03ledav001.gho.boulder.ibm.com (b03ledav001.gho.boulder.ibm.com [9.17.130.232]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x1R3xaGT23789770 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 27 Feb 2019 03:59:37 GMT Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D0C1F6E04E; Wed, 27 Feb 2019 03:59:36 +0000 (GMT) Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 37FA96E050; Wed, 27 Feb 2019 03:59:36 +0000 (GMT) Received: from birb.localdomain (unknown [9.102.35.114]) by b03ledav001.gho.boulder.ibm.com (Postfix) with SMTP; Wed, 27 Feb 2019 03:59:35 +0000 (GMT) Received: by birb.localdomain (Postfix, from userid 1000) id 574DF4EC65C; Wed, 27 Feb 2019 14:59:32 +1100 (AEDT) From: Stewart Smith To: Jordan Niethe , linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH] powerpc/powernv: Make opal log only readable by root In-Reply-To: <20190227030229.12814-1-jniethe5@gmail.com> References: <20190227030229.12814-1-jniethe5@gmail.com> Date: Wed, 27 Feb 2019 14:59:32 +1100 MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-GCONF: 00 x-cbid: 19022703-8235-0000-0000-00000E65D93D X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010671; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000281; SDB=6.01166928; UDB=6.00609586; IPR=6.00947536; MB=3.00025758; MTD=3.00000008; XFM=3.00000015; UTC=2019-02-27 03:59:38 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19022703-8236-0000-0000-0000449D33EF Message-Id: <87ef7tubiz.fsf@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-02-27_03:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=992 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902270027 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jordan Niethe Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Jordan Niethe writes: > Currently the opal log is globally readable. It is kernel policy to limit > the visibility of physical addresses / kernel pointers to root. > Given this and the fact the opal log may contain this information it would > be better to limit the readability to root. > > Signed-off-by: Jordan Niethe Yeah, this is a really good idea. Reviewed-by: Stewart Smith -- Stewart Smith OPAL Architect, IBM.