linux-kernel - Re: userns: targeted capabilities v5

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Message-Id: <20110217162146.1b8e45e0.akpm@linux-foundation.org>
Date:	Thu, 17 Feb 2011 16:21:46 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Serge E. Hallyn" <serge@...lyn.com>
Cc:	LSM <linux-security-module@...r.kernel.org>,
	James Morris <jmorris@...ei.org>,
	Kees Cook <kees.cook@...onical.com>,
	containers@...ts.linux-foundation.org,
	kernel list <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Michael Kerrisk <mtk.manpages@...il.com>, xemul@...allels.com,
	dhowells@...hat.com
Subject: Re: userns: targeted capabilities v5

On Thu, 17 Feb 2011 15:02:24 +0000
"Serge E. Hallyn" <serge@...lyn.com> wrote:

> Here is a repost of my previous user namespace patch, ported onto
> last night's git head.
> 
> It fixes several things I was doing wrong in the last (v4)
> posting, in particular:
> 
> 	1. don't set uts_ns->user_ns to current's when !CLONE_NEWUTS
> 	2. add a ipc_ns->user_ns which owns ipc_ns, and use that to
> 	   decide CAP_IPC_OWNER
> 	3. fix logic flaw caused by bad parantheses
> 	4. allow do_prlimit to current
> 	5. don't always give root full privs to init_user_ns
> 
> The expected course of development for user namespaces is laid out
> at https://wiki.ubuntu.com/UserNamespace.

Seems like a nice feature to be developing.

I worry about the maturity of it all at this stage.  How far along is
it *really*?

Is anyone else working with you on developing and reviewing this work?

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