Received: by 2002:ac0:aed5:0:0:0:0:0 with SMTP id t21csp6324726imb; Fri, 8 Mar 2019 15:01:25 -0800 (PST) X-Google-Smtp-Source: APXvYqwD4jya8uTvmdnN12r47sMskU5GzfVCrVZXmV5efqLcgOp4vlp4imC3j/zlVtFYkLg0WTL+ X-Received: by 2002:a65:44cb:: with SMTP id g11mr19204805pgs.29.1552086085187; Fri, 08 Mar 2019 15:01:25 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1552086085; cv=none; d=google.com; s=arc-20160816; b=JqTnkfRMkMGCwSO+3zZl1gNMeuYTmb376qUE15+aOrBTkmqoIsMehjTwC7EoCSCPjC BjxUSIYydb+Y3Js63dBzCZB6A8wJuhiWEu4QsljDRk4u8vvZErDHfBwPN3rDmMJTEhYJ fJsYUov1LphoxkaKBqk2b5yar0yFX6BPCMB8kuZWteFKj67lXw6m4Mf7uR9PpjAHpYKC Oxv/9gne8MNMWTwDb/cpw7gnk22Qh5Nj8s3ergvpiVq+j+FH8Kjoh1DiJr2VNzunjmvs +gvYF/mjlTdu9HQHC5ya/O2HzmyvhnFskglEA7qsXsYOSjS45QoXToP/8DzzPl4HL3u1 xV7A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:user-agent:references :message-id:in-reply-to:subject:cc:to:from:date; bh=iUjQaV2K2U3I+TMSGsQmW0zNdfEeVCE3RdAP0yfVfZE=; b=PKOx6ePYHrTPyJVWeZV2N5Epqt39Kyr7dhCcI7P+Zk6EYnAu1X3Rke5R84LM+6DTfL mL3+w7fdfOnHFZkjguuz003g/6Z9KxObe6MPdJxlbgqqQVE64oBZUWvBPKuJOCfEvxCs BbRevWLgpAeF/pWV3Ni0ZHsKxCQ8TOijjWYm91M4SoObqNcaDx7qfX8Hh304fXRbEUAu mO7Cux+HomxTI8KqhsbTKQh7Id3ClSthh447p1XwPM/MDXK47kSQgWOoDv6IqXm1cEzy R9UxtnuH6K672IqTYG2JBxt/w2Or0gjV7Nd3Yg4eNjM+t1tEA98g6AvW7/LtymHhdGLw 2YyQ== 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id q3si8372518plb.200.2019.03.08.15.01.05; Fri, 08 Mar 2019 15:01:25 -0800 (PST) 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726463AbfCHXAn (ORCPT + 99 others); Fri, 8 Mar 2019 18:00:43 -0500 Received: from namei.org ([65.99.196.166]:56194 "EHLO namei.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726324AbfCHXAn (ORCPT ); Fri, 8 Mar 2019 18:00:43 -0500 Received: from localhost (localhost [127.0.0.1]) by namei.org (8.14.4/8.14.4) with ESMTP id x28N0cn0012822; Fri, 8 Mar 2019 23:00:38 GMT Date: Sat, 9 Mar 2019 10:00:38 +1100 (AEDT) From: James Morris To: Matthew Garrett cc: linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, dhowells@redhat.com Subject: Re: [PATCH 03/27] Enforce module signatures if the kernel is locked down In-Reply-To: <20190306235913.6631-4-matthewgarrett@google.com> Message-ID: References: <20190306235913.6631-1-matthewgarrett@google.com> <20190306235913.6631-4-matthewgarrett@google.com> User-Agent: Alpine 2.21 (LRH 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 6 Mar 2019, Matthew Garrett wrote: > From: David Howells > > If the kernel is locked down, require that all modules have valid > signatures that we can verify. Perhaps note that this won't cover the case where folk are using DM-Verity with a signed root hash for verifying kernel modules. -- James Morris