Received: by 2002:a25:4158:0:0:0:0:0 with SMTP id o85csp7376257yba; Thu, 2 May 2019 08:50:14 -0700 (PDT) X-Google-Smtp-Source: APXvYqyeJ+31Cn3PWnzxB0KmhZThgTr8npkuaIIr4JPp40iWT74CfbZ1OOuHqWbfiybfb6WEo2OO X-Received: by 2002:a63:5110:: with SMTP id f16mr4723582pgb.107.1556812214066; Thu, 02 May 2019 08:50:14 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1556812214; cv=none; d=google.com; s=arc-20160816; b=IbYd/IFAXiq8QdI1CygBsqNodcz2npsi08o0OvVfrY+w8prLhPl9RKKJxGZUKJ96wq jURQUQZj4IOgWTFQ6lnG38UkZYsE7FKDHGWVFxjjCywWXcVQBJagySkDwso668bwfDW/ c16zt1dbSyhM62EBbrARVpO/p0jBu4O6p66av1dXfvrJRSbdJ/XDusaHg+1sEySk84OS GumWNqFerWk6+IHMtmKLWCpOVKgOhqzbhwn/n/hrbI6tQvrGTLT7YTGWfn44xZVwg4mj FgN/y4Pi6sHXesXuC7BLkX+oxZrhL6FZ2cpl1uP4jlbCioDbOVPXouzdEaBdzpqnzyBg DD6Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:content-transfer-encoding :mime-version:references:in-reply-to:date:cc:to:from:subject; bh=oqFJID3gpFZa6Jee5+xK4JpJ/StztkvXhfDMlj8KxZY=; b=c0ZdG4UCZaiHy0iqXT57+8IOxejKbzMAQlHr8Rci1bl0C6/6d3p5vCjjzu6VZWcp4Z XWn5VJQIp5pXSjCd0Lcrq+qkFThmVDj/qCO48BkK9vOwSjLT0JMLWAzb5njIODTG8jjs 46Keo2WT4Na9uVElWuPSIUyVHnmlaHrG182tO+7xIAu2aaf5Tgq6iWZu7FYAtVqjeN0W E2AGM69d5q6+1cZVfOuEm8vpBaVxwbeHDx3bAqzcEt7A5G8yknFEdEA7j5Wz2X/aS+Re mlGpOR/xt8azFUHgvQa41Ne9zROVWHmUgasREZBKkVlpdgaoo24cglfo7lM6PvwcC65p UUug== 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=ibm.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id i7si43531759pgl.261.2019.05.02.08.49.58; Thu, 02 May 2019 08:50:14 -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=ibm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727242AbfEBPsm (ORCPT + 99 others); Thu, 2 May 2019 11:48:42 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:50190 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726958AbfEBPsl (ORCPT ); Thu, 2 May 2019 11:48:41 -0400 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x42Fl4El006839 for ; Thu, 2 May 2019 11:48:40 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 2s81j3x4xp-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 02 May 2019 11:48:39 -0400 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 2 May 2019 16:48:38 +0100 Received: from b06cxnps4075.portsmouth.uk.ibm.com (9.149.109.197) by e06smtp03.uk.ibm.com (192.168.101.133) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 2 May 2019 16:48:34 +0100 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x42FmX7O47448276 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 2 May 2019 15:48:33 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2EC26A404D; Thu, 2 May 2019 15:48:33 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0E117A4051; Thu, 2 May 2019 15:48:32 +0000 (GMT) Received: from localhost.localdomain (unknown [9.80.95.175]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 2 May 2019 15:48:31 +0000 (GMT) Subject: Re: [PATCH] kexec_buffer measure From: Mimi Zohar To: prakhar srivastava Cc: linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module , Paul Moore , Casey Schaufler , John Johansen Date: Thu, 02 May 2019 11:48:21 -0400 In-Reply-To: <1555978681.4914.305.camel@linux.ibm.com> References: <1555978681.4914.305.camel@linux.ibm.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.20.5 (3.20.5-1.fc24) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 19050215-0012-0000-0000-000003179DCD X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19050215-0013-0000-0000-000021500DB5 Message-Id: <1556812101.4134.28.camel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-05-02_09:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=975 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1905020105 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [Cc'ing Paul, John, Casey] On Mon, 2019-04-22 at 20:18 -0400, Mimi Zohar wrote: > [Cc'ing LSM mailing list] > > On Fri, 2019-04-19 at 17:30 -0700, prakhar srivastava wrote: > > > 2) Adding a LSM hook > > We are doing both the command line and kernel version measurement in IMA. > > Can you please elaborate on how this can be used outside of the scenario? > > That will help me come back with a better design and code. I am > > neutral about this. > > As I said previously, initially you might want to only measure the > kexec boot command line, but will you ever want to verify or audit log > the boot command line hash?  Perhaps LSMs would be interested in the > boot command line.  Should this be an LSM hook? From an LSM perspective, is there any interest in the boot command line? Mimi