linux-kernel - Re: [PATCH 1/2] user namespaces: let user

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Message-ID: <alpine.LRH.1.10.0812080946360.23851@tundra.namei.org>
Date:	Mon, 8 Dec 2008 09:46:51 +1100 (EST)
From:	James Morris <jmorris@...ei.org>
To:	"Serge E. Hallyn" <serue@...ibm.com>
cc:	lkml <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	David Howells <dhowells@...hat.com>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
Subject: Re: [PATCH 1/2] user namespaces: let user_ns be cloned with
 fairsched

On Wed, 3 Dec 2008, Serge E. Hallyn wrote:

> (These two patches are in the next-unacked branch of
> git://git.kernel.org/pub/scm/linux/kernel/git/sergeh/userns-2.6.
> If they get some ACKs, then I hope to feed this into security-next.
> After these two, I think we're ready to tackle userns+capabilities)
> 
> Fairsched creates a per-uid directory under /sys/kernel/uids/.
> So when you clone(CLONE_NEWUSER), it tries to create
> /sys/kernel/uids/0, which already exists, and you get back
> -ENOMEM.
> 
> This was supposed to be fixed by sysfs tagging, but that
> was postponed (ok, rejected until sysfs locking is fixed).
> So, just as with network namespaces, we just don't create
> those directories for user namespaces other than the init.
> 
> Signed-off-by: Serge E. Hallyn <serue@...ibm.com>

Applied to 
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6#next


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