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From: James Morris <jmorris@namei.org>
To: "Mickaël Salaün" <mic@digikod.net>
Cc: "Casey Schaufler" <casey@schaufler-ca.com>,
	linux-kernel@vger.kernel.org, "Al Viro" <viro@zeniv.linux.org.uk>,
	"Andy Lutomirski" <luto@amacapital.net>,
	"Arnd Bergmann" <arnd@arndb.de>, "Jann Horn" <jannh@google.com>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Kees Cook" <keescook@chromium.org>,
	"Michael Kerrisk" <mtk.manpages@gmail.com>,
	"Mickaël Salaün" <mickael.salaun@ssi.gouv.fr>,
	"Serge E . Hallyn" <serge@hallyn.com>,
	"Shuah Khan" <shuah@kernel.org>,
	"Vincent Dagonneau" <vincent.dagonneau@ssi.gouv.fr>,
	kernel-hardening@lists.openwall.com, linux-api@vger.kernel.org,
	linux-arch@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org,
	linux-security-module@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH v17 05/10] fs,landlock: Support filesystem access-control
Date: Fri, 15 May 2020 03:31:38 +1000 (AEST)
Message-ID: <alpine.LRH.2.21.2005150329580.26489@namei.org> (raw)
In-Reply-To: <c159d845-6108-4b67-6527-405589fa5382@digikod.net>


[-- Attachment #1: Type: text/plain, Size: 907 bytes --]

On Thu, 14 May 2020, Mickaël Salaün wrote:

> > This needs to be converted to the LSM API via superblock blob stacking.
> > 
> > See Casey's old patch: 
> > https://lore.kernel.org/linux-security-module/20190829232935.7099-2-casey@schaufler-ca.com/
> 
> s_landlock_inode_refs is quite similar to s_fsnotify_inode_refs, but I
> can do it once the superblock security blob patch is upstream. Is it a
> blocker for now? What is the current status of lbs_superblock?

Yes it is a blocker. Landlock should not be adding its own functions in 
core code, it should be using the LSM API (and extending that as needed).

> Anyway, we also need to have a call to landlock_release_inodes() in
> generic_shutdown_super(), which does not fit the LSM framework, and I
> think it is not an issue. Landlock handling of inodes is quite similar
> to fsnotify.

fsnotify is not an LSM.

-- 
James Morris
<jmorris@namei.org>

  parent reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-11 19:21 [PATCH v17 00/10] Landlock LSM Mickaël Salaün
2020-05-11 19:21 ` [PATCH v17 01/10] landlock: Add object management Mickaël Salaün
2020-05-11 19:21 ` [PATCH v17 02/10] landlock: Add ruleset and domain management Mickaël Salaün
2020-05-14  3:09   ` James Morris
2020-05-14 10:27     ` Mickaël Salaün
2020-05-11 19:21 ` [PATCH v17 03/10] landlock: Set up the security framework and manage credentials Mickaël Salaün
2020-05-11 19:21 ` [PATCH v17 04/10] landlock: Add ptrace restrictions Mickaël Salaün
2020-05-11 19:21 ` [PATCH v17 05/10] fs,landlock: Support filesystem access-control Mickaël Salaün
2020-05-14  3:37   ` James Morris
2020-05-14 10:39     ` Mickaël Salaün
2020-05-14 15:58       ` Casey Schaufler
2020-05-14 18:46         ` Mickaël Salaün
2020-05-14 17:31       ` James Morris [this message]
2020-05-14 18:49         ` Mickaël Salaün
2020-05-14 19:37           ` James Morris
2020-05-11 19:21 ` [PATCH v17 06/10] landlock: Add syscall implementation Mickaël Salaün
2020-05-11 19:21 ` [PATCH v17 07/10] arch: Wire up landlock() syscall Mickaël Salaün
2020-05-11 19:21 ` [PATCH v17 08/10] selftests/landlock: Add initial tests Mickaël Salaün
2020-05-11 19:21 ` [PATCH v17 09/10] samples/landlock: Add a sandbox manager example Mickaël Salaün
2020-05-11 19:21 ` [PATCH v17 10/10] landlock: Add user and kernel documentation Mickaël Salaün
2020-05-11 21:54 ` [PATCH v17 00/10] Landlock LSM Mickaël Salaün

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