From patchwork Tue Jul 25 15:44:12 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 9862379 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 97407601A1 for ; Tue, 25 Jul 2017 15:48:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 78860286BE for ; Tue, 25 Jul 2017 15:48:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6D640286D1; Tue, 25 Jul 2017 15:48:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.4 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, SUSPICIOUS_RECIPS autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DED73286BE for ; Tue, 25 Jul 2017 15:48:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752910AbdGYPsG (ORCPT ); Tue, 25 Jul 2017 11:48:06 -0400 Received: from lhrrgout.huawei.com ([194.213.3.17]:32201 "EHLO lhrrgout.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752888AbdGYPsE (ORCPT ); Tue, 25 Jul 2017 11:48:04 -0400 Received: from 172.18.7.190 (EHLO lhreml709-cah.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DRZ83622; Tue, 25 Jul 2017 15:48:02 +0000 (GMT) Received: from roberto-HP-EliteDesk-800-G2-DM-65W.huawei.com (10.204.65.245) by smtpsuk.huawei.com (10.201.108.32) with Microsoft SMTP Server (TLS) id 14.3.301.0; Tue, 25 Jul 2017 16:47:55 +0100 From: Roberto Sassu To: CC: , , , , Roberto Sassu Subject: [PATCH 01/12] ima: generalize ima_read_policy() Date: Tue, 25 Jul 2017 17:44:12 +0200 Message-ID: <20170725154423.24845-2-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170725154423.24845-1-roberto.sassu@huawei.com> References: <20170725154423.24845-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.65.245] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020203.59776832.008E, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 793ccf4dc919323c7b8b62fc37da6057 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Rename ima_read_policy() to ima_read_file(), and add file_id as new parameter. If file_id is equal to READING_POLICY, ima_read_file() behavior is the same of that without the patch. ima_read_file() will be used to read digest lists, to avoid reporting measurements when the file digest is known. Signed-off-by: Roberto Sassu --- security/integrity/ima/ima_fs.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c index ad491c5..058d3c1 100644 --- a/security/integrity/ima/ima_fs.c +++ b/security/integrity/ima/ima_fs.c @@ -272,7 +272,7 @@ static const struct file_operations ima_ascii_measurements_ops = { .release = seq_release, }; -static ssize_t ima_read_policy(char *path) +static ssize_t ima_read_file(char *path, enum kernel_read_file_id file_id) { void *data; char *datap; @@ -285,16 +285,22 @@ static ssize_t ima_read_policy(char *path) datap = path; strsep(&datap, "\n"); - rc = kernel_read_file_from_path(path, &data, &size, 0, READING_POLICY); + rc = kernel_read_file_from_path(path, &data, &size, 0, file_id); if (rc < 0) { pr_err("Unable to open file: %s (%d)", path, rc); return rc; } datap = data; - while (size > 0 && (p = strsep(&datap, "\n"))) { - pr_debug("rule: %s\n", p); - rc = ima_parse_add_rule(p); + while (size > 0) { + if (file_id == READING_POLICY) { + p = strsep(&datap, "\n"); + if (p == NULL) + break; + + pr_debug("rule: %s\n", p); + rc = ima_parse_add_rule(p); + } if (rc < 0) break; size -= rc; @@ -334,7 +340,7 @@ static ssize_t ima_write_policy(struct file *file, const char __user *buf, goto out_free; if (data[0] == '/') { - result = ima_read_policy(data); + result = ima_read_file(data, READING_POLICY); } else if (ima_appraise & IMA_APPRAISE_POLICY) { pr_err("IMA: signed policy file (specified as an absolute pathname) required\n"); integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL, NULL,