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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable 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 4F678C4360F for ; Fri, 15 Feb 2019 15:50:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1ED4D2192D for ; Fri, 15 Feb 2019 15:50:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550245821; bh=CAIig8PUERhXRJGQpDBjlmgQ3YeLE3VkY0ViUwAkvQg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=LWhpb/YPRHcY6Aj/RVSIaS2zxkYA9VAy42wout/ZYi0HzsipSL7qPLkMABcURPR9h mKWPIQR6tDhMBTOUrbG/OAy16xT7q+v6Uw+1i10BLNd1IqfSxTb2rxvdjscNaiK9ov 52wU6PvQZww2mEgCtGZZhinMnhimSZD8hYM0akdU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730324AbfBOPuU (ORCPT ); Fri, 15 Feb 2019 10:50:20 -0500 Received: from mail-yb1-f194.google.com ([209.85.219.194]:46528 "EHLO mail-yb1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726155AbfBOPuU (ORCPT ); Fri, 15 Feb 2019 10:50:20 -0500 Received: by mail-yb1-f194.google.com with SMTP id 7so3930649ybp.13; Fri, 15 Feb 2019 07:50:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=VgrhECn1nXRRLs8srQZV/Qr9SLLlA2Knfhd8ON2h60I=; b=Bh9lhmpPOsVnYHm4IQAatpZd0ssJLtDYUc8rRQhd3y5UwFJkq02vuvd/seO6xaVZhR UK1ZwDMcu/DpCq/w/K7Y7AHGRQC9ITGiZI/gfkf2TNEshD5faLSEFZRl44TOezdqdeGk Z7ZRjyh8FvI45vktKtHdLUGxkEcB90NLyGZRZgWL9UK5ED6JqtNFsScEADbDA/vnwdN/ QCO9mSyDiN+slTC+P96bqnGpI6adJTOpq8mxDFR9TH/taOJXeRs1FsF7tEM1H0+CuD8l PTV7TpkI6Dtyq7D08gp1cgGgIWYxhnlLYMyP3SXc5srXt55lq51WzRWg5UG7zpzxGpNk E0pA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=VgrhECn1nXRRLs8srQZV/Qr9SLLlA2Knfhd8ON2h60I=; b=L/qraJZX+7HwDxLa1BlMYTv9F0nD9HkuZFc8QGw+REv7AESac0mwME6rHn47nCGdGu UTFTKVFb3uc29i7FsWDePbsjQELkbyCKid1JcGh80Zs2nkSrQMqe3RnmaR3UIs+H4IkM 0piFsLo7CerDuc1U18iv+3EYsq9Q+88nxnJt253CjtPhJ6zp0y4881J0BGJ0oaF6BtBq IEQT0v06SZnjYE9YGt2LuQFdXu4Wcql39AFUj/oPkVLi4uR5bdRyqc3yLXQGjRckUWW1 XdDs/qiDobHteaKziSTAwHxm1HLDaAhP6ernDS0TCPc81VQkXZcIiLPv4Ew0owJJTfJR m3bg== X-Gm-Message-State: AHQUAuYt3MLUPJfSFL9LBJFbnLfvsQQIQOseSgQ+RlNxomiwzrlouu4M ugu+e3K6k6IobMYHFGGsflw= X-Google-Smtp-Source: AHgI3Iacfx/iSfYxUWD8XotxSL2fO/RF3Gkj1xaH5nOlulElLJjQjUDsS1AVqXYb32CGJIbY6IQSSQ== X-Received: by 2002:a5b:348:: with SMTP id q8mr8227739ybp.479.1550245818326; Fri, 15 Feb 2019 07:50:18 -0800 (PST) Received: from localhost ([2620:10d:c091:200::5:2c70]) by smtp.gmail.com with ESMTPSA id b65sm2164873ywb.29.2019.02.15.07.50.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 15 Feb 2019 07:50:17 -0800 (PST) Date: Fri, 15 Feb 2019 07:50:14 -0800 From: Tejun Heo To: Ondrej Mosnacek Cc: selinux@vger.kernel.org, Paul Moore , Stephen Smalley , Linux Security Module list , Casey Schaufler , Greg Kroah-Hartman , linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org Subject: Re: [PATCH v6 5/5] kernfs: initialize security of newly created nodes Message-ID: <20190215155014.GP50184@devbig004.ftw2.facebook.com> References: <20190214095015.16032-1-omosnace@redhat.com> <20190214095015.16032-6-omosnace@redhat.com> <20190214154854.GO50184@devbig004.ftw2.facebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Fri, Feb 15, 2019 at 04:45:44PM +0100, Ondrej Mosnacek wrote: > On Thu, Feb 14, 2019 at 4:49 PM Tejun Heo wrote: > > On Thu, Feb 14, 2019 at 10:50:15AM +0100, Ondrej Mosnacek wrote: > > > +static int kernfs_node_init_security(struct kernfs_node *parent, > > > + struct kernfs_node *kn) > > > > Can we skip the whole thing if security is not enabled? > > Do you mean just skipping the whole part when CONFIG_SECURITY=n? That > is easy to do and I can add it in the next respin (although the > compiler should be able to optimize most of it out in that case). So the goal is allowing folks who don't use this to not pay. It'd be better the evaulation can be as late as possible but obviously there's a point where that'd be too complicated. Maybe "ever enabled in this boot" is a good and simple enough at the same time? Thanks. -- tejun