linux-kernel - Re: [PATCH v2 0/7] Smack namespace

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Message-id: <1432719372.1784.4.camel@samsung.com>
Date:	Wed, 27 May 2015 11:36:12 +0200
From:	Lukasz Pawelczyk <l.pawelczyk@...sung.com>
To:	Stephen Smalley <sds@...ho.nsa.gov>
Cc:	"David S. Miller" <davem@...emloft.net>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Lutomirski <luto@...capital.net>,
	Casey Schaufler <casey@...aufler-ca.com>,
	David Howells <dhowells@...hat.com>,
	Fabian Frederick <fabf@...net.be>,
	Greg KH <gregkh@...uxfoundation.org>,
	James Morris <james.l.morris@...cle.com>,
	Jeff Layton <jlayton@...marydata.com>,
	Jingoo Han <jg1.han@...sung.com>,
	Joe Perches <joe@...ches.com>,
	John Johansen <john.johansen@...onical.com>,
	Jonathan Corbet <corbet@....net>,
	Kees Cook <keescook@...omium.org>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Miklos Szeredi <miklos@...redi.hu>,
	Oleg Nesterov <oleg@...hat.com>,
	Paul Moore <paul@...l-moore.com>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	Zefan Li <lizefan@...wei.com>,
	Rafal Krypa <r.krypa@...sung.com>, linux-doc@...r.kernel.org,
	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	containers@...ts.linux-foundation.org,
	Lukasz Pawelczyk <havner@...il.com>
Subject: Re: [PATCH v2 0/7] Smack namespace

On wto, 2015-05-26 at 10:35 -0400, Stephen Smalley wrote:
> On 05/25/2015 08:32 AM, Lukasz Pawelczyk wrote:
> > --- Usage ---
> > 
> > Smack namespace is written using LSM hooks inside user namespace. That
> > means it's connected to it.
> > 
> > To create a new Smack namespace you need to unshare() user namespace
> > as usual. If that is all you do though, than there is no difference to
> > what is now. To activate the Smack namespace you need to fill the
> > labels' map. It is in a file /proc/$PID/smack_map.
> 
> This should be /proc/$PID/attr/label_map or similar, modeled after the
> existing /proc/$PID/attr/current and similar nodes.  Then it isn't
> module-specific and can be reused for other modules.

To make this generic I'll have to introduce new LSH hooks to handle this
file (much like /proc/$PID/attr/current).
I take this is what you had in mind.


-- 
Lukasz Pawelczyk
Samsung R&D Institute Poland
Samsung Electronics



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