linux-kernel - Re: [PATCH v3 5/7] selinux: Add support for unprivileged mounts from user namespaces

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Message-ID: <alpine.LRH.2.20.1511181101290.1460@namei.org>
Date:	Wed, 18 Nov 2015 11:02:25 +1100 (AEDT)
From:	James Morris <jmorris@...ei.org>
To:	Seth Forshee <seth.forshee@...onical.com>
cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Paul Moore <paul@...l-moore.com>,
	Stephen Smalley <sds@...ho.nsa.gov>,
	Eric Paris <eparis@...isplace.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Andy Lutomirski <luto@...capital.net>,
	linux-kernel@...r.kernel.org, linux-bcache@...r.kernel.org,
	dm-devel@...hat.com, linux-raid@...r.kernel.org,
	linux-mtd@...ts.infradead.org, linux-fsdevel@...r.kernel.org,
	linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov,
	James Morris <james.l.morris@...cle.com>,
	"Serge E. Hallyn" <serge@...lyn.com>
Subject: Re: [PATCH v3 5/7] selinux: Add support for unprivileged mounts from
 user namespaces

On Tue, 17 Nov 2015, Seth Forshee wrote:

> Security labels from unprivileged mounts in user namespaces must
> be ignored. Force superblocks from user namespaces whose labeling
> behavior is to use xattrs to use mountpoint labeling instead.
> For the mountpoint label, default to converting the current task
> context into a form suitable for file objects, but also allow the
> policy writer to specify a different label through policy
> transition rules.
> 
> Pieced together from code snippets provided by Stephen Smalley.
> 
> Signed-off-by: Seth Forshee <seth.forshee@...onical.com>
> Acked-by: Stephen Smalley <sds@...ho.nsa.gov>


Acked-by: James Morris <james.l.morris@...cle.com>

-- 
James Morris
<jmorris@...ei.org>

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