linux-kernel - Re: [PATCH 00/16] Permit filesystem local caching [try #3]

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Date:	Wed, 15 Aug 2007 09:30:42 -0700 (PDT)
From:	Casey Schaufler <casey@...aufler-ca.com>
To:	Stephen Smalley <sds@...ho.nsa.gov>, casey@...aufler-ca.com
Cc:	David Howells <dhowells@...hat.com>, torvalds@...l.org,
	akpm@...l.org, steved@...hat.com, trond.myklebust@....uio.no,
	linux-fsdevel@...r.kernel.org, linux-cachefs@...hat.com,
	nfsv4@...ux-nfs.org, linux-kernel@...r.kernel.org,
	selinux@...ho.nsa.gov,
	LSM List <linux-security-module@...r.kernel.org>
Subject: Re: [PATCH 00/16] Permit filesystem local caching [try #3]


--- Stephen Smalley <sds@...ho.nsa.gov> wrote:

> On Tue, 2007-08-14 at 08:53 -0700, Casey Schaufler wrote:
> > --- David Howells <dhowells@...hat.com> wrote:
> > 
> > > Casey Schaufler <casey@...aufler-ca.com> wrote:
> > > 
> > > > With Smack you can leave the label alone, raise CAP_MAC_OVERRIDE,
> > > > do your business of setting the label correctly, and then drop
> > > > the capability. No new hooks required.
> > > 
> > > That sounds like a contradiction.  How can you both leave it alone and
> set
> > > it?
> > 
> > Whoops, sorry. You leave the process label alone and explicitly
> > set the file label using the xattr interfaces.
> 
> xattr interfaces don't help with the initial labeling of the file when
> it is created.

That's true. The deamon needs to run with an appropriate label.
I don't believe that this is situation with a really simple solution
because the activity being performed is unusual. 
 
> -- 
> Stephen Smalley
> National Security Agency
> 
> 
> --
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> 
> 


Casey Schaufler
casey@...aufler-ca.com
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