From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1,USER_IN_DEF_DKIM_WL autolearn=no 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 496D3C35280 for ; Fri, 1 May 2020 20:36:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2798821835 for ; Fri, 1 May 2020 20:36:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="FX9Weop6" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726746AbgEAUgK (ORCPT ); Fri, 1 May 2020 16:36:10 -0400 Received: from linux.microsoft.com ([13.77.154.182]:38658 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726463AbgEAUgK (ORCPT ); Fri, 1 May 2020 16:36:10 -0400 Received: from [10.137.106.115] (unknown [131.107.174.243]) by linux.microsoft.com (Postfix) with ESMTPSA id 2E03E20B717B; Fri, 1 May 2020 13:36:09 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 2E03E20B717B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1588365369; bh=cyxau+BJRB8pNdZIKeMiXqeTQ9iFyycCE0oPRNjr7fo=; h=From:Subject:To:Cc:References:Date:In-Reply-To:From; b=FX9Weop6wlrng0/8hGiSCdvgxdFkS+Z1/o9Fe4MU2xRO9DBB4XKEBWREI7DJ2vIxB mVkhUIl3E7l3C9Q95xLWCgPgC+JrcQHOEv14018rn+OSDBX0RpMUzq2jsbqtw2LFQW qxY32+/8JumhhaegNkX6DhGnshtSVVHR7REqYTnw= From: Deven Bowers Subject: Re: [PATCH v4 1/5] fs: Add support for an O_MAYEXEC flag on openat2(2) To: =?UTF-8?Q?Micka=c3=abl_Sala=c3=bcn?= , linux-kernel@vger.kernel.org Cc: Aleksa Sarai , Alexei Starovoitov , Al Viro , Andy Lutomirski , Christian Heimes , Daniel Borkmann , Eric Chiang , Florian Weimer , James Morris , Jan Kara , Jann Horn , Jonathan Corbet , Kees Cook , Matthew Garrett , Matthew Wilcox , Michael Kerrisk , =?UTF-8?Q?Micka=c3=abl_Sala=c3=bcn?= , Mimi Zohar , =?UTF-8?Q?Philippe_Tr=c3=a9buchet?= , Scott Shell , Sean Christopherson , Shuah Khan , Steve Dower , Steve Grubb , Thibaut Sautereau , Vincent Strubel , kernel-hardening@lists.openwall.com, linux-api@vger.kernel.org, linux-security-module@vger.kernel.org, linux-fsdevel@vger.kernel.org References: <20200430132320.699508-1-mic@digikod.net> <20200430132320.699508-2-mic@digikod.net> Message-ID: <12e3c9f0-a419-53a9-f404-7ce206709fe4@linux.microsoft.com> Date: Fri, 1 May 2020 13:36:08 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200430132320.699508-2-mic@digikod.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On 4/30/2020 6:23 AM, Mickaël Salaün wrote: > When the O_MAYEXEC flag is passed, openat2(2) may be subject to > additional restrictions depending on a security policy managed by the > kernel through a sysctl or implemented by an LSM thanks to the > inode_permission hook. > This new flag is ignored by open(2) and openat(2). Reviewed-by: Deven Bowers