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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 3FFAEC4360D for ; Wed, 25 Sep 2019 12:35:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 16DD02146E for ; Wed, 25 Sep 2019 12:35:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730435AbfIYMfB (ORCPT ); Wed, 25 Sep 2019 08:35:01 -0400 Received: from mga07.intel.com ([134.134.136.100]:40044 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726369AbfIYMfB (ORCPT ); Wed, 25 Sep 2019 08:35:01 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Sep 2019 05:35:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,548,1559545200"; d="scan'208";a="203602442" Received: from kmakows-mobl.ger.corp.intel.com (HELO localhost) ([10.249.39.225]) by fmsmga001.fm.intel.com with ESMTP; 25 Sep 2019 05:34:58 -0700 Date: Wed, 25 Sep 2019 15:34:57 +0300 From: Jarkko Sakkinen To: James Bottomley Cc: linux-integrity@vger.kernel.org, linux-crypto@vger.kernel.org, linux-security-module@vger.kernel.org Subject: Re: [PATCH v6 02/12] tpm-buf: add handling for TPM2B types Message-ID: <20190925123457.GB24028@linux.intel.com> References: <1568031408.6613.29.camel@HansenPartnership.com> <1568031515.6613.31.camel@HansenPartnership.com> <20190920141826.GC9578@linux.intel.com> <1569323560.24519.6.camel@HansenPartnership.com> <20190925123401.GA24028@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190925123401.GA24028@linux.intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.10.1 (2018-07-13) Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: On Wed, Sep 25, 2019 at 03:34:01PM +0300, Jarkko Sakkinen wrote: > On Tue, Sep 24, 2019 at 07:12:40AM -0400, James Bottomley wrote: > > I thought about that. The main problem is that most of the > > construct/append functions use the header, and these are the functions > > most useful to the TPM2B operation. > > > > The other thing that argues against this is that the TPM2B case would > > save nothing if we eliminated the header, because we allocate a page > > for all the data regardless. > > It would be way more clean. There is absolutely nothing TPM2B specific. Given the recent regression I'm detaching allocation from tpm_buf and make it purely a decorator (sending patch today). /Jarkko