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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable 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 7F3CFC04AAC for ; Mon, 20 May 2019 11:33:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5971320656 for ; Mon, 20 May 2019 11:33:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731441AbfETLd3 (ORCPT ); Mon, 20 May 2019 07:33:29 -0400 Received: from mga11.intel.com ([192.55.52.93]:40492 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731422AbfETLd2 (ORCPT ); Mon, 20 May 2019 07:33:28 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 May 2019 04:33:28 -0700 X-ExtLoop1: 1 Received: from mhauser-mobl.ger.corp.intel.com (HELO localhost) ([10.252.47.244]) by orsmga006.jf.intel.com with ESMTP; 20 May 2019 04:33:14 -0700 Date: Mon, 20 May 2019 14:33:13 +0300 From: Jarkko Sakkinen To: Andy Lutomirski Cc: Sean Christopherson , James Morris , "Serge E. Hallyn" , LSM List , Paul Moore , Stephen Smalley , Eric Paris , selinux@vger.kernel.org, Jethro Beekman , "Xing, Cedric" , "Hansen, Dave" , Thomas Gleixner , "Dr. Greg" , Linus Torvalds , LKML , X86 ML , "linux-sgx@vger.kernel.org" , Andrew Morton , "nhorman@redhat.com" , "npmccallum@redhat.com" , "Ayoun, Serge" , "Katz-zamir, Shay" , "Huang, Haitao" , Andy Shevchenko , "Svahn, Kai" , Borislav Petkov , Josh Triplett , "Huang, Kai" , David Rientjes Subject: Re: SGX vs LSM (Re: [PATCH v20 00/28] Intel SGX1 support) Message-ID: <20190520113313.GB27805@linux.intel.com> References: <20190513102926.GD8743@linux.intel.com> <20190514104323.GA7591@linux.intel.com> <20190514204527.GC1977@linux.intel.com> <20190515013031.GF1977@linux.intel.com> <20190516051622.GC6388@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-sgx-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org On Thu, May 16, 2019 at 02:02:58PM -0700, Andy Lutomirski wrote: > That certainly *could* be done, and I guess the decision could be left > to the LSMs, but I'm not convinced this adds value. What security use > case does this cover that isn't already covered by requiring EXECUTE > (e.g. lib_t) on the enclave file and some new SIGSTRUCT right on the > .sigstruct? I guess you are right as SIGSTRUCT completely shields the memory layout and contents of an enclave. /Jarkko