linux-kernel - Re: RFC: Network privilege separation.

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Message-ID: <20090112194333.GB23848@one.firstfloor.org>
Date:	Mon, 12 Jan 2009 20:43:33 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Valdis.Kletnieks@...edu
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Michael Stone <michael@...top.org>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: RFC: Network privilege separation.

> Yes, the network access part *is* something that should be part of a more
> general interface.  Having said that, we currently are lacking a way for a
> *general user* program to say "I'm all set up, and would like to disavow any
> other further resource access (except maybe r/o access as "other" to file
> systems)".

seccomp does exactly that. It's quite obscure, but available in most
linux kernels. Basically it blocks everything except
read/write on already open file descriptors.

I always thought it would be nice if codecs (which tend
to be full of security holes) ran in such jails by default

-Andi


-- 
ak@...ux.intel.com -- Speaking for myself only.
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