linux-kernel - Re: [PATCH] Undo some of the pseudo-security madness

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Message-Id: <200701221520.l0MFKLdK032645@turing-police.cc.vt.edu>
Date:	Mon, 22 Jan 2007 10:20:21 -0500
From:	Valdis.Kletnieks@...edu
To:	Samium Gromoff <_deepfire@...lingofgreen.ru>
Cc:	David Wagner <daw@...berkeley.edu>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Undo some of the pseudo-security madness

On Mon, 22 Jan 2007 02:23:30 +0300, Samium Gromoff said:
>
> not "core-dumps" but "core files", in the lispspeak, but anyway.
> 
> the reason is trivial -- if i can write programs enjoying setuid
> privileges in C, i want to be able to do the same in Lisp.

Go read up on how the XEmacs crew designed their "portable dumper",
specifically to get around a lot of these sorts of problems because the
old Emacs 'unexec' code was incredibly fragile.

> the only way to achieve this i see, is to directly setuid root
> the lisp system executable itself -- because the lisp code
> is read, compiled and executed in the process of the lisp
> system executable.

If that's the only way you can see to do it, maybe you should think a
bit harder before making kernel hacks to do something.





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