linux-kernel - Re: [malware-list] TALPA - a threat model? well sorta.

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Message-ID: <20080813222353.5c809060@lxorguk.ukuu.org.uk>
Date:	Wed, 13 Aug 2008 22:23:53 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Rik van Riel <riel@...hat.com>
Cc:	"Press, Jonathan" <Jonathan.Press@...com>,
	"Eric Paris" <eparis@...hat.com>, peterz@...radead.org,
	linux-kernel@...r.kernel.org, malware-list@...ts.printk.net,
	hch@...radead.org, andi@...stfloor.org, viro@...IV.linux.org.uk,
	arjan@...radead.org
Subject: Re: [malware-list] TALPA - a threat model?  well sorta.

On Wed, 13 Aug 2008 17:35:29 -0400
Rik van Riel <riel@...hat.com> wrote:

> On Wed, 13 Aug 2008 17:24:28 -0400
> "Press, Jonathan" <Jonathan.Press@...com> wrote:
> 
> > I may be missing something about your suggestion, but I don't see how
> > this would work.  Who does the chmod?
> 
> Chmod is also not a solution to the hierarchical storage (or incremental
> restore from backup) problem.
> 
> I believe we really do need the block-on-open.

The block on open is orthogonal really. Useful for HSM, useful for
certain very primitive scanning but not much else that I can see.

And its a minor mod to the security hooks to allow it as far as I can see
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