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=-18.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_IN_DEF_DKIM_WL 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 41774C433E0 for ; Tue, 23 Mar 2021 00:14:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1326B619AB for ; Tue, 23 Mar 2021 00:14:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230467AbhCWAOU (ORCPT ); Mon, 22 Mar 2021 20:14:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34090 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231284AbhCWAN6 (ORCPT ); Mon, 22 Mar 2021 20:13:58 -0400 Received: from mail-lj1-x22c.google.com (mail-lj1-x22c.google.com [IPv6:2a00:1450:4864:20::22c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 34C67C061763 for ; Mon, 22 Mar 2021 17:13:56 -0700 (PDT) Received: by mail-lj1-x22c.google.com with SMTP id u10so23344229lju.7 for ; Mon, 22 Mar 2021 17:13:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=0Zv/Nh1NwdjT4vNoEgAKJF0+3Ir6H8KTDS01ZyTPf3o=; b=MYfMpOlaWILZRe1pDeuZweAI3vdknsgeo67laT+dKd7DkSPJ3kqkICjvz6DoYVVnHZ 16OeAVHxuQfaEw3tjPMoe7QoNfBgXwLH10I06HQvLQrqH5L2JNBJAwiEQ2JR4BIEX+9S mKRD0C7UQTjhxOy/6H8fA1YjCpW2EGV+O/1qAjuqnz/pmrLszTPkOjvS0yYpv/ZZ/qEF lAjiGv9YsocO9v0uFbeqK3kItyVLmzZ8XbFjbvISEZUv72q4Dv/aYT92AgSreyZJuLpZ d2c1Ghef/K4UviwHxjZHI5pznTsVIQq7ZchuSPAoEZC7/qFfjBKUTKzfd7IBKdOJs9LE ySlA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=0Zv/Nh1NwdjT4vNoEgAKJF0+3Ir6H8KTDS01ZyTPf3o=; b=cwy9fVsFuOkNslb9qipcCAvRmq0p8ag3wpGboKLA1cMVrJV1Ud5GTJnI6sMZ/3T6oB ybty4pKcCiFYFKYaJduPol8BnZ+XpTvhOKK8XeR4mglTzlAsd0z2+Bq24/hr69AydZFr EJc1aQ6CLXlF8Au+YDPZp08bNTtSALxpMXjngQEflq0Bd2xWZ4c0RM7vX3H7BK1bsF/p G/pYbB+gulfUb9MOvTqonp9kKdr9Xvayrs8w+Zxb+ujCYF2g3pm3Zy4kLXD5DK9cl+qc J1U8ym8WOHuFJ0OZ7GquTarCk/KWwKifzRvE3Atrvbt92kSFyQUq01snViYyus6rF/7+ 3LVQ== X-Gm-Message-State: AOAM532+oGActpTu7x7HvIEtm4S0+QpW5S4rgT+UJrWlb7iRhy4MpX4+ gLxwbOCf80O5tDXaGJvRP3RGydzoPKYt6wlgplXnZg== X-Google-Smtp-Source: ABdhPJywL/8xL+s/Wz9PYQqACsNKJlIixpOZzrkkMLprtEmtD0taXBt0RZSmBTlrPE/s8ZHyKoeWgqn3ctd+1W/a4Oo= X-Received: by 2002:a2e:9bcd:: with SMTP id w13mr1219196ljj.43.1616458434230; Mon, 22 Mar 2021 17:13:54 -0700 (PDT) MIME-Version: 1.0 References: <20210316204252.427806-1-mic@digikod.net> <20210316204252.427806-3-mic@digikod.net> In-Reply-To: <20210316204252.427806-3-mic@digikod.net> From: Jann Horn Date: Tue, 23 Mar 2021 01:13:27 +0100 Message-ID: Subject: Re: [PATCH v30 02/12] landlock: Add ruleset and domain management To: =?UTF-8?B?TWlja2HDq2wgU2FsYcO8bg==?= Cc: James Morris , "Serge E . Hallyn" , Al Viro , Andrew Morton , Andy Lutomirski , Anton Ivanov , Arnd Bergmann , Casey Schaufler , David Howells , Jeff Dike , Jonathan Corbet , Kees Cook , Michael Kerrisk , Richard Weinberger , Shuah Khan , Vincent Dagonneau , Kernel Hardening , Linux API , linux-arch , "open list:DOCUMENTATION" , linux-fsdevel , kernel list , "open list:KERNEL SELFTEST FRAMEWORK" , linux-security-module , "the arch/x86 maintainers" , =?UTF-8?B?TWlja2HDq2wgU2FsYcO8bg==?= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org On Tue, Mar 16, 2021 at 9:43 PM Micka=C3=ABl Sala=C3=BCn = wrote: > A Landlock ruleset is mainly a red-black tree with Landlock rules as > nodes. This enables quick update and lookup to match a requested > access, e.g. to a file. A ruleset is usable through a dedicated file > descriptor (cf. following commit implementing syscalls) which enables a > process to create and populate a ruleset with new rules. > > A domain is a ruleset tied to a set of processes. This group of rules > defines the security policy enforced on these processes and their future > children. A domain can transition to a new domain which is the > intersection of all its constraints and those of a ruleset provided by > the current process. This modification only impact the current process. > This means that a process can only gain more constraints (i.e. lose > accesses) over time. > > Cc: James Morris > Cc: Jann Horn > Cc: Kees Cook > Signed-off-by: Micka=C3=ABl Sala=C3=BCn > Acked-by: Serge Hallyn > Link: https://lore.kernel.org/r/20210316204252.427806-3-mic@digikod.net Reviewed-by: Jann Horn