Date: Tue, 25 Sep 2007 16:48:06 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: David Newall <david@davidnewall.com>
Cc: "Serge E. Hallyn" <serge@hallyn.com>, Bill Davidsen <davidsen@tmr.com>,
       Philipp Marek <philipp@marek.priv.at>, 7eggert@gmx.de,
       majkls <majkls@prepere.com>, bunk@fs.tum.de,
       linux-kernel@vger.kernel.org
Subject: Re: Chroot bug
Message-ID: <20070925164806.4cadc6a5@the-village.bc.nu>
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On Wed, 26 Sep 2007 01:05:07 +0930
David Newall <david@davidnewall.com> wrote:

> Alan Cox wrote:
> >> Marek's loading dynamic libraries, it seems clear that the prime purpose 
> >> of chroot is to aid security.  Being able to cd your way out is handy 
> >>     
> >
> > Does it - I can't find any evidence for that.
> 
> It seems self-evident to me.  What do you think is it prime purpose?

Debugging and testing. At least that is as I understand it much of where
it came from.

> > A root user can get out of a chroot a million different ways
> One of those ways shouldn't be that chroot lets you out.

A fence with 10000 open gates is not improved by turning it into a fence
with 9999 open gates. 
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