linux-kernel - Re: [AppArmor 39/45] AppArmor: Profile loading and manipulation, pathname matching

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Message-ID: <Line.LNX.4.64.0706152143010.29737@localhost.localdomain>
Date:	Fri, 15 Jun 2007 21:46:54 -0400 (EDT)
From:	James Morris <jmorris@...ei.org>
To:	Seth Arnold <seth.arnold@...e.de>
cc:	Greg KH <greg@...ah.com>, Crispin Cowan <crispin@...ell.com>,
	Pavel Machek <pavel@....cz>,
	Andreas Gruenbacher <agruen@...e.de>,
	Stephen Smalley <sds@...ho.nsa.gov>, jjohansen@...e.de,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [AppArmor 39/45] AppArmor: Profile loading and manipulation,
 pathname matching

On Fri, 15 Jun 2007, Seth Arnold wrote:

> > How does inotify not work here?  You are notified that the tree is
> > moved, your daemon goes through and relabels things as needed.  In the
> > meantime, before the re-label happens, you might have the wrong label on
> > things, but "somehow" SELinux already handles this, so I think you
> > should be fine.
> 
> SELinux does not relabel files when containing directories move, so it
> is not a problem they've chosen to face.

It's a deliberate design choice, and follows traditional Unix security 
logic.  DAC permissions don't change on every file in the subtree when you 
mv directories, either.




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