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[23.128.96.18]) by mx.google.com with ESMTP id oi22si85661ejb.690.2020.12.03.12.46.37; Thu, 03 Dec 2020 12:46:59 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@ibm.com header.s=pp1 header.b=tPY+g20s; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728524AbgLCUoA (ORCPT + 99 others); Thu, 3 Dec 2020 15:44:00 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:43220 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725885AbgLCUn7 (ORCPT ); Thu, 3 Dec 2020 15:43:59 -0500 Received: from pps.filterd (m0187473.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0B3KdYgE140764; Thu, 3 Dec 2020 15:43:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : subject : from : to : cc : date : in-reply-to : references : content-type : mime-version : content-transfer-encoding; s=pp1; bh=xdxiKiKIqcjET4+9fMusWkPkzX/cFh6Jey/xlFUt0Ko=; b=tPY+g20s0ly84EtVX1PWEPYqvpfxCR0OvwACGwBmqt8WSAloANHHX0leeMr7/j/xKlnD wv5YYKFTL7oS9tD9i6o93f1I89tggTY4xENlokmBpUvBUTx4MYWQO9HccGo/nyapJYVm 1ukfkCPlep+PJj4tVuAyC+13mFI8B6Fo2PO6tBZokaXaJ4KKXyH13LBYCqzX2yV2NLpu f+FcsxvqSF+AxYH5YZuy7oHMybsupwpW0+ejw3PrDxi9ISPvaPzNZM1S/vt478jF6QWe 0x0OGG5ALocHyBNn+QLkXycZZtDHCG2AdfgEVN5UIg4VSaK+KLy7mPywexpyRyRNTJsG YA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 357734g6mu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 03 Dec 2020 15:43:14 -0500 Received: from m0187473.ppops.net (m0187473.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 0B3KdqJu141331; Thu, 3 Dec 2020 15:43:09 -0500 Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 357734g6m3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 03 Dec 2020 15:43:08 -0500 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 0B3Kg4Rd011961; Thu, 3 Dec 2020 20:43:06 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma03ams.nl.ibm.com with ESMTP id 3573v9r52b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 03 Dec 2020 20:43:06 +0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0B3Kh44s51052944 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 3 Dec 2020 20:43:04 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 752E9AE051; Thu, 3 Dec 2020 20:43:04 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B9FDCAE04D; Thu, 3 Dec 2020 20:43:02 +0000 (GMT) Received: from li-f45666cc-3089-11b2-a85c-c57d1a57929f.ibm.com (unknown [9.160.43.205]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 3 Dec 2020 20:43:02 +0000 (GMT) Message-ID: Subject: Re: [PATCH v3 04/11] ima: Move ima_reset_appraise_flags() call to post hooks From: Mimi Zohar To: Roberto Sassu , "mjg59@google.com" Cc: "linux-integrity@vger.kernel.org" , "linux-security-module@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Silviu Vlasceanu Date: Thu, 03 Dec 2020 15:43:01 -0500 In-Reply-To: References: <20201111092302.1589-1-roberto.sassu@huawei.com> <20201111092302.1589-5-roberto.sassu@huawei.com> Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.28.5 (3.28.5-12.el8) Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-12-03_12:2020-12-03,2020-12-03 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 mlxlogscore=999 spamscore=0 phishscore=0 clxscore=1015 priorityscore=1501 mlxscore=0 bulkscore=0 impostorscore=0 adultscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012030120 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2020-12-02 at 11:56 +0000, Roberto Sassu wrote: > > From: Roberto Sassu > > Sent: Wednesday, November 11, 2020 10:23 AM > > ima_inode_setxattr() and ima_inode_removexattr() hooks are called > > before an > > operation is performed. Thus, ima_reset_appraise_flags() should not be > > called there, as flags might be unnecessarily reset if the operation is > > denied. > > > > This patch introduces the post hooks ima_inode_post_setxattr() and > > ima_inode_post_removexattr(), removes ima_inode_removexattr() and > > adds the > > call to ima_reset_appraise_flags() in the new functions. > > Removing ima_inode_removexattr() is not correct. We should still prevent > that security.ima is removed when CAP_SYS_ADMIN is not set. I will fix > this in the next version. Ok. So this patch will define the post hooks and defer ima_reset_appraise_flags() to them, leaving the original hooks intact. Mimi