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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 000A3ECE562 for ; Mon, 17 Sep 2018 23:26:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9E3402088F for ; Mon, 17 Sep 2018 23:26:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E3402088F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=canonical.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728950AbeIREzy (ORCPT ); Tue, 18 Sep 2018 00:55:54 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:59645 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728023AbeIREzy (ORCPT ); Tue, 18 Sep 2018 00:55:54 -0400 Received: from static-50-53-48-205.bvtn.or.frontiernet.net ([50.53.48.205] helo=[10.8.192.6]) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.76) (envelope-from ) id 1g22uH-0001pH-Nv; Mon, 17 Sep 2018 23:26:18 +0000 Subject: Re: [PATCH 16/18] LSM: Allow arbitrary LSM ordering To: Kees Cook , =?UTF-8?Q?Micka=c3=abl_Sala=c3=bcn?= Cc: Casey Schaufler , James Morris , Tetsuo Handa , Paul Moore , Stephen Smalley , "Schaufler, Casey" , LSM , LKLM References: <20180916003059.1046-1-keescook@chromium.org> <20180916003059.1046-17-keescook@chromium.org> <84e1a5a8-8997-829f-cf09-1d29895a3f99@schaufler-ca.com> <35b0af5b-e37e-e192-73b5-0d0b37d9e37f@schaufler-ca.com> <8f0bd39b-29a6-325d-4558-d9f484249c22@schaufler-ca.com> <53377892-695f-6336-8574-54c7aa0a4201@schaufler-ca.com> <7ecfffc3-d2a4-3ff7-4bf5-db3029d73c59@canonical.com> From: John Johansen Openpgp: preference=signencrypt Autocrypt: addr=john.johansen@canonical.com; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/17/2018 04:20 PM, Kees Cook wrote: > On Mon, Sep 17, 2018 at 4:10 PM, Mickaël Salaün wrote: >> Landlock, because it target unprivileged users, should only be called >> after all other major (access-control) LSMs. The admin or distro must >> not be able to change that order in any way. This constraint doesn't >> apply to current LSMs, though. > > Good point! It will be easy to add LSM_ORDER_LAST, though, given the > machinery introduced in this series. > And when we have two LSMs that want to use that?