linux-kernel - Re: JIT emulator needs

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Message-ID: <467957CB.8020704@zytor.com>
Date:	Wed, 20 Jun 2007 09:37:31 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	William Lee Irwin III <wli@...omorphy.com>
CC:	Albert Cahalan <acahalan@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: JIT emulator needs

William Lee Irwin III wrote:
> 
> I presumed an ELF note or extended filesystem attributes were already
> in place for this sort of affair. It may be that the model implemented
> is so restrictive that users are forbidden to create new executables,
> in which case using a different model is certainly in order. Otherwise
> the ELF note or attributes need to be implemented.
> 

Another thing to keep in mind, since we're talking about security
policies in the first place, is that anything like this *MUST* be
"opt-in" on the part of the security policy, because what we're talking
about is circumventing an explicit security policy just based on a
user-provided binary saying, in effect, "don't worry, I know what I'm
doing."

Changing the meaning of an established explicit security policy is not
acceptable.

	-hpa
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