linux-kernel - Re: [PATCH -mm 5/7] add user namespace

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Message-Id: <1152894951.24925.70.camel@localhost.localdomain>
Date:	Fri, 14 Jul 2006 09:35:51 -0700
From:	Dave Hansen <haveblue@...ibm.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	"Serge E. Hallyn" <serue@...ibm.com>,
	Cedric Le Goater <clg@...ibm.com>,
	linux-kernel@...r.kernel.org, Andrew Morton <akpm@...l.org>,
	Kirill Korotaev <dev@...nvz.org>, Andrey Savochkin <saw@...ru>,
	Herbert Poetzl <herbert@...hfloor.at>,
	Sam Vilain <sam.vilain@...alyst.net.nz>
Subject: Re: [PATCH -mm 5/7] add user namespace

On Fri, 2006-07-14 at 09:13 -0600, Eric W. Biederman wrote:
> Already mentioned but.  rw permissions on sensitive files are for 
> uid == 0.  No capability checks are performed. 

I'd also like to point out that we can do this whole process very
incrementally.  If we want, we can start out with all containers
chroot'd into a filesystem namespace which uses read-only bind mounts
and doesn't allow any write access to the underlying filesystem.

As we introduce the capability checks, we can start to actually
cooperatively share more data.

-- Dave

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