From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-1153505-1520117816-2-8765607395866679161 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.249, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='com', MailFrom='org', XOriginatingCountry='US' X-Spam-charsets: plain='iso-8859-1' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1520117816; b=FDK1OYs20NidoLXdyg2LrgsXSFoj0cWAEC5Fr3vL0tQ82ue aR8yDgELN+WGPkXBwkrUkO+GlApHDcEYChQEJgUdFplzeuUK/Zuu1n9S0/YbWjLz YHt6p7WfDMJdzJpdyJ6+Ao7HIoGz3grG0siS6edzbjH6WaMaYAiGsWeARWA8B/oE 8T6Q4S0JEwvu4PYjsIpbv369q78ImCZJjSKxfhsu+q1uPmb4X7OormreHC2fJo5Y Rnh/x2ptNb6a1bB0cMDE95RWmXAgG/yYzCLsl58c9U66AYv3OQLmFhrGILcq2mya J8tDSNubA89v6RL+1QJaCWIlr30PJUK3gfpz+EA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :references:in-reply-to:content-type:content-transfer-encoding :mime-version:sender:list-id; s=arctest; t=1520117816; bh=PK8DUI pMHFwZ5h9vsa59TPS3+LLBYV6acqI+ha20jFM=; b=b65dJ2+pvCkgf/MOLs2VGy OpB9lS41lEtpR75H2vBXEAeoLy6xdqjs/8tFE1hc3BVNil1GUbdZ+mWcPhP5ApGa TSuQWEnLzpMJttUViw5MmXyEP6eB9kSeGQeNIuN1PqcN2RHQIv2qhs7Bs/3u8r0o rMSomaFxQjG/8AlUhAXdgWE41oXqFahI5McTZgKhZwNlL6IWTwScoDPjJHhyC2ds XLtsakdff0dpTXJjS9qYGp+kAnFpyFKRiYyYLczAPWE0DwDdCXvA9gi1K/KC6CvC 2y5xCxkU6+OrkF0Fur7Oxmk+qXv91F7zZrwr8eD8cEzBYLFGRjPv3M4DabD8lmEw == ARC-Authentication-Results: i=1; mx4.messagingengine.com; arc=none (no signatures found); dkim=pass (1024-bit rsa key sha256) header.d=microsoft.com header.i=@microsoft.com header.b=nF4w9JIk x-bits=1024 x-keytype=rsa x-algorithm=sha256 x-selector=selector1; dmarc=pass (p=reject,has-list-id=yes,d=none) header.from=microsoft.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=microsoft.com header.result=pass header_is_org_domain=yes Authentication-Results: mx4.messagingengine.com; arc=none (no signatures found); dkim=pass (1024-bit rsa key sha256) header.d=microsoft.com header.i=@microsoft.com header.b=nF4w9JIk x-bits=1024 x-keytype=rsa x-algorithm=sha256 x-selector=selector1; dmarc=pass (p=reject,has-list-id=yes,d=none) header.from=microsoft.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=microsoft.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935359AbeCCWk7 (ORCPT ); Sat, 3 Mar 2018 17:40:59 -0500 Received: from mail-cys01nam02on0109.outbound.protection.outlook.com ([104.47.37.109]:30112 "EHLO NAM02-CY1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S935118AbeCCWk5 (ORCPT ); Sat, 3 Mar 2018 17:40:57 -0500 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Mimi Zohar , Sasha Levin Subject: [PATCH AUTOSEL for 4.4 115/115] ima: relax requiring a file signature for new files with zero length Thread-Topic: [PATCH AUTOSEL for 4.4 115/115] ima: relax requiring a file signature for new files with zero length Thread-Index: AQHTsz9wKDWJmW52dE68jCe4GV8b3A== Date: Sat, 3 Mar 2018 22:31:58 +0000 Message-ID: <20180303223010.27106-115-alexander.levin@microsoft.com> References: <20180303223010.27106-1-alexander.levin@microsoft.com> In-Reply-To: <20180303223010.27106-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;MWHSPR01MB344;7:KNkSTBif7WpRIp07ozqRrkerPC1N9yzES5cxS8VHyWk/Cn0VYNb2TGb0fi/zfF1S9Fh+vNK+feoiATFmVtXOXZOUGGWLwd4MtqCf5YCQepa/sl9q0KmwyLZkEt1dy6YAiodPgsqbYlTjsuBPzqHjXXEIjS8QNRSoS8xfmTEYGY6keJG3Mpg4fS/uJ5wdSUrPoORTFVDMTOgKKOjO++X96ivx340ZUY9xSUvEqQDoxpQ5uu7DOcsUrbyp1w2ualq0 x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: a4e6cded-6451-42b4-6ecc-08d58157d2a7 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(4534165)(4627221)(201703031133081)(201702281549075)(48565401081)(5600026)(4604075)(3008032)(2017052603307)(7193020);SRVR:MWHSPR01MB344; x-ms-traffictypediagnostic: MWHSPR01MB344: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(89211679590171)(192374486261705)(104084551191319); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(61425038)(6040501)(2401047)(5005006)(8121501046)(3231220)(944501244)(52105095)(93006095)(93001095)(3002001)(10201501046)(6055026)(61426038)(61427038)(6041288)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123560045)(20161123564045)(20161123562045)(20161123558120)(6072148)(201708071742011);SRVR:MWHSPR01MB344;BCL:0;PCL:0;RULEID:;SRVR:MWHSPR01MB344; x-forefront-prvs: 0600F93FE1 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(396003)(376002)(346002)(39860400002)(366004)(39380400002)(189003)(199004)(59450400001)(8676002)(5660300001)(5250100002)(2501003)(6506007)(575784001)(7736002)(36756003)(25786009)(3846002)(6116002)(97736004)(305945005)(2900100001)(76176011)(6436002)(10090500001)(26005)(8936002)(186003)(81166006)(102836004)(81156014)(106356001)(86362001)(10290500003)(3660700001)(2906002)(99286004)(14454004)(86612001)(105586002)(478600001)(4326008)(6486002)(53936002)(107886003)(68736007)(316002)(54906003)(110136005)(6512007)(72206003)(3280700002)(22452003)(2950100002)(1076002)(66066001)(22906009)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:MWHSPR01MB344;H:MW2PR2101MB1034.namprd21.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;MX:1;A:1;LANG:en; x-microsoft-antispam-message-info: R7+t7G+bRARs1sFLpgrhgX2hm6gmxD1EzO8AROJ9kfpdK8tbObFLikiQNadDTY6TI522ulG8MI3pqjh1ZSFQEseLX67tch9UN9XmaKNOIKk+fMkkgR5Xo95BH/pzZ+7qNTdcHlnaO/cv/abLqUDqQhl3xT3PL39QxpbR1/tjsy4= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: a4e6cded-6451-42b4-6ecc-08d58157d2a7 X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Mar 2018 22:31:58.3083 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHSPR01MB344 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Mimi Zohar [ Upstream commit b7e27bc1d42e8e0cc58b602b529c25cd0071b336 ] Custom policies can require file signatures based on LSM labels. These files are normally created and only afterwards labeled, requiring them to be signed. Instead of requiring file signatures based on LSM labels, entire filesystems could require file signatures. In this case, we need the ability of writing new files without requiring file signatures. The definition of a "new" file was originally defined as any file with a length of zero. Subsequent patches redefined a "new" file to be based on the FILE_CREATE open flag. By combining the open flag with a file size of zero, this patch relaxes the file signature requirement. Fixes: 1ac202e978e1 ima: accept previously set IMA_NEW_FILE Signed-off-by: Mimi Zohar Signed-off-by: Sasha Levin --- security/integrity/ima/ima_appraise.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima= /ima_appraise.c index 19014293f927..8da7c91b725d 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -206,7 +206,8 @@ int ima_appraise_measurement(int func, struct integrity= _iint_cache *iint, if (opened & FILE_CREATED) iint->flags |=3D IMA_NEW_FILE; if ((iint->flags & IMA_NEW_FILE) && - !(iint->flags & IMA_DIGSIG_REQUIRED)) + (!(iint->flags & IMA_DIGSIG_REQUIRED) || + (inode->i_size =3D=3D 0))) status =3D INTEGRITY_PASS; goto out; } --=20 2.14.1