From patchwork Fri Apr 9 11:43:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 12193915 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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT 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 D4463C433ED for ; Fri, 9 Apr 2021 11:43:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A85E061177 for ; Fri, 9 Apr 2021 11:43:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232087AbhDILn6 (ORCPT ); Fri, 9 Apr 2021 07:43:58 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:2818 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231370AbhDILn5 (ORCPT ); Fri, 9 Apr 2021 07:43:57 -0400 Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4FGx1305h1z687PM; Fri, 9 Apr 2021 19:36:39 +0800 (CST) Received: from fraphisprd00473.huawei.com (7.182.8.141) by fraeml714-chm.china.huawei.com (10.206.15.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Fri, 9 Apr 2021 13:43:42 +0200 From: Roberto Sassu To: CC: , , , Roberto Sassu Subject: [PATCH 0/7] ima/evm: Small enhancements Date: Fri, 9 Apr 2021 13:43:06 +0200 Message-ID: <20210409114313.4073-1-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 X-Originating-IP: [7.182.8.141] X-ClientProxiedBy: lhreml754-chm.china.huawei.com (10.201.108.204) To fraeml714-chm.china.huawei.com (10.206.15.33) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org This patch set provides some small enhancements for IMA and EVM. Patch 1 avoids measurement and audit when access to the file will be denied by IMA itself. Patch 2 introduces a new policy keyword meta_immutable to protect the label transition during binary execution. Patch 3-5 add new hard-coded policies aiming at producing measurement or enforcing access to files that likely are provided by software vendors. Patch 6 increases the crypto resistance of EVM by allowing the choice of the hash algorithm for the HMAC. Patch 7 adds two new values for the evm= option in the kernel command line to facilitate the setup of EVM. Roberto Sassu (7): ima: Avoid measurement and audit if access to the file will be denied ima: Add meta_immutable appraisal type ima: Introduce exec_tcb and tmpfs policies ima: Introduce appraise_exec_tcb and appraise_tmpfs policies ima: Introduce appraise_exec_immutable policy evm: Allow choice of hash algorithm for HMAC evm: Extend evm= with allow_metadata_writes and complete values Documentation/ABI/testing/ima_policy | 2 +- .../admin-guide/kernel-parameters.txt | 36 +++++++- security/integrity/evm/Kconfig | 34 +++++++ security/integrity/evm/evm.h | 2 + security/integrity/evm/evm_crypto.c | 55 ++++++++++-- security/integrity/evm/evm_main.c | 29 ++++-- security/integrity/ima/ima_appraise.c | 9 ++ security/integrity/ima/ima_main.c | 20 +++-- security/integrity/ima/ima_policy.c | 90 ++++++++++++++----- security/integrity/integrity.h | 4 +- 10 files changed, 232 insertions(+), 49 deletions(-)