linux-kernel - Re: sys_chroot+sys

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Message-ID: <46F401D6.6060609@cfl.rr.com>
Date:	Fri, 21 Sep 2007 13:39:34 -0400
From:	Phillip Susi <psusi@....rr.com>
To:	David Newall <david@...idnewall.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Bill Davidsen <davidsen@....com>, majkls <majkls@...pere.com>,
	bunk@...tum.de, linux-kernel@...r.kernel.org
Subject: Re: sys_chroot+sys_fchdir Fix

David Newall wrote:
> * In particular, the superuser can escape from a =91chroot jail=92 by d=
> oing=20
> =91mkdir foo; chroot foo; cd ..=92.

No, he can not.

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