From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932516AbcHINTl (ORCPT ); Tue, 9 Aug 2016 09:19:41 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:2698 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932223AbcHINTi (ORCPT ); Tue, 9 Aug 2016 09:19:38 -0400 X-IBM-Helo: d24dlp01.br.ibm.com X-IBM-MailFrom: bauerman@linux.vnet.ibm.com X-IBM-RcptTo: linux-kernel@vger.kernel.org;linux-security-module@vger.kernel.org From: Thiago Jung Bauermann To: Mimi Zohar Cc: Michael Ellerman , linux-security-module@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-ima-devel@lists.sourceforge.net, Dave Young Subject: Re: [PATCH 1/7] ima: on soft reboot, restore the measurement list Date: Tue, 09 Aug 2016 10:19:28 -0300 User-Agent: KMail/4.14.3 (Linux/3.13.0-92-generic; KDE/4.14.13; x86_64; ; ) In-Reply-To: <1470747673.2881.118.camel@linux.vnet.ibm.com> References: <1470313475-20090-1-git-send-email-zohar@linux.vnet.ibm.com> <87wpjqtdg8.fsf@concordia.ellerman.id.au> <1470747673.2881.118.camel@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16080913-0020-0000-0000-0000022CE8CD X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16080913-0021-0000-0000-000030154BEB Message-Id: <3544655.o5QPxko4Ba@hactar> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-08-09_04:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1608090138 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Dienstag, 09 August 2016, 09:01:13 schrieb Mimi Zohar: > On Tue, 2016-08-09 at 20:59 +1000, Michael Ellerman wrote: > > Mimi Zohar writes: > > > diff --git a/security/integrity/ima/ima.h > > > b/security/integrity/ima/ima.h > > > index b5728da..84e8d36 100644 > > > --- a/security/integrity/ima/ima.h > > > +++ b/security/integrity/ima/ima.h > > > @@ -102,6 +102,13 @@ struct ima_queue_entry { > > > > > > }; > > > extern struct list_head ima_measurements; /* list of all measurements > > > */ > > > > > > +/* Some details preceding the binary serialized measurement list */ > > > +struct ima_kexec_hdr { > > > + unsigned short version; > > > + unsigned long buffer_size; > > > + unsigned long count; > > > +} __packed; > > > + > > > > Am I understanding it correctly that this structure is passed between > > kernels? > Yes, the header prefixes the measurement list, which is being passed on > the same computer to the next kernel. Could the architecture (eg. > LE/BE) change between soft re-boots? Yes. I am able to boot a BE kernel from an LE kernel with my patches. Whether we want to support that or not is another question... -- []'s Thiago Jung Bauermann IBM Linux Technology Center