From patchwork Thu Dec 16 05:43:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 12679989 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14667C433FE for ; Thu, 16 Dec 2021 05:43:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231422AbhLPFnu (ORCPT ); Thu, 16 Dec 2021 00:43:50 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:45446 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S231384AbhLPFnu (ORCPT ); Thu, 16 Dec 2021 00:43:50 -0500 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 1BG4UpsE005088; Thu, 16 Dec 2021 05:43:38 GMT DKIM-Signature: v=1; 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Thu, 16 Dec 2021 05:43:34 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 16 Dec 2021 05:43:34 +0000 (GMT) From: Stefan Berger To: linux-integrity@vger.kernel.org Cc: zohar@linux.ibm.com, serge@hallyn.com, christian.brauner@ubuntu.com, containers@lists.linux.dev, dmitry.kasatkin@gmail.com, ebiederm@xmission.com, krzysztof.struczynski@huawei.com, roberto.sassu@huawei.com, mpeters@redhat.com, lhinds@redhat.com, lsturman@redhat.com, puiterwi@redhat.com, jejb@linux.ibm.com, jamjoom@us.ibm.com, linux-kernel@vger.kernel.org, paul@paul-moore.com, rgb@redhat.com, linux-security-module@vger.kernel.org, jmorris@namei.org, Stefan Berger Subject: [PATCH v7 07/14] ima: Only accept AUDIT rules for IMA non-init_ima_ns namespaces for now Date: Thu, 16 Dec 2021 00:43:16 -0500 Message-Id: <20211216054323.1707384-8-stefanb@linux.vnet.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211216054323.1707384-1-stefanb@linux.vnet.ibm.com> References: <20211216054323.1707384-1-stefanb@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: rlT3sIlBt0FiJkEn6Be0b_1mwctqnTMR X-Proofpoint-ORIG-GUID: jC1e7ocdQQAR2ALKmyZg1PCsPgZ6i042 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2021-12-16_01,2021-12-14_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 impostorscore=0 spamscore=0 clxscore=1015 adultscore=0 mlxscore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2112160033 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org From: Stefan Berger Only accept AUDIT rules for non-init_ima_ns namespaces rejecting all rules that require support for measuring, appraisal, and hashing. Signed-off-by: Stefan Berger --- security/integrity/ima/ima_policy.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index 786e4fd81ba9..3191979235fc 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -1793,6 +1793,16 @@ static int ima_parse_rule(struct ima_namespace *ns, result = -EINVAL; break; } + + /* IMA namespace only accepts AUDIT rules */ + if (ns != &init_ima_ns) { + switch (entry->action) { + case MEASURE: + case APPRAISE: + case HASH: + result = -EINVAL; + } + } } if (!result && !ima_validate_rule(entry)) result = -EINVAL;