Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756620AbbEUQvU (ORCPT ); Thu, 21 May 2015 12:51:20 -0400 Received: from lan.nucleusys.com ([92.247.61.126]:43911 "EHLO zztop.nucleusys.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756275AbbEUQvO (ORCPT ); Thu, 21 May 2015 12:51:14 -0400 Date: Thu, 21 May 2015 19:51:02 +0300 From: Petko Manolov To: Andy Lutomirski Cc: David Howells , Mimi Zohar , Joey Lee , Rusty Russell , Kyle McMartin , Sedat Dilek , LSM List , Jiri Kosina , Konstantin Ryabitsev , Michal Marek , Seth Forshee , "Luis R. Rodriguez" , "linux-kernel@vger.kernel.org" , Borislav Petkov , David Woodhouse , Linux Wireless List , Linus Torvalds , Greg Kroah-Hartman , James Morris , keyrings@linux-nfs.org, Abelardo Ricart III , "Serge E. Hallyn" Subject: Re: [RFD] linux-firmware key arrangement for firmware signing Message-ID: <20150521165101.GI18164@localhost> Mail-Followup-To: Andy Lutomirski , David Howells , Mimi Zohar , Joey Lee , Rusty Russell , Kyle McMartin , Sedat Dilek , LSM List , Jiri Kosina , Konstantin Ryabitsev , Michal Marek , Seth Forshee , "Luis R. Rodriguez" , "linux-kernel@vger.kernel.org" , Borislav Petkov , David Woodhouse , Linux Wireless List , Linus Torvalds , Greg Kroah-Hartman , James Morris , keyrings@linux-nfs.org, Abelardo Ricart III , "Serge E. Hallyn" References: <20150519200232.GM23057@wotan.suse.de> <555BA438.2070802@kernel.org> <20150519221128.GP23057@wotan.suse.de> <9567.1432223509@warthog.procyon.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) X-Spam-Score: -1.0 (-) X-Spam-Report: Spam detection software, running on the system "zztop.nucleusys.com", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: On 15-05-21 09:39:50, Andy Lutomirski wrote: > > It's also a performance cost because the average user of this signature stuff > doesn't actually want IMA, and IMA is checking the wrong think anyway. > IMA/EVM tells us "this file validly belongs in /lib/modules/whatever according > to whomever we trust for the filesystem". We want to check "is this data, > regardless of where it was read from, a trusted module". [...] Content analysis details: (-1.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 875 Lines: 19 On 15-05-21 09:39:50, Andy Lutomirski wrote: > > It's also a performance cost because the average user of this signature stuff > doesn't actually want IMA, and IMA is checking the wrong think anyway. > IMA/EVM tells us "this file validly belongs in /lib/modules/whatever according > to whomever we trust for the filesystem". We want to check "is this data, > regardless of where it was read from, a trusted module". IMA-appraise does not care where the file comes from (although it may be persuaded to) and verifies file's data and meta-data against a signature. I guess you should actually read the code. :) Petko -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/