linux-kernel - Re: sys_chroot+sys

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Message-ID: <46FAECC5.8040103@davidnewall.com>
Date:	Thu, 27 Sep 2007 09:05:33 +0930
From:	David Newall <david@...idnewall.com>
To:	Adrian Bunk <bunk@...nel.org>
CC:	Christer Weinigel <christer@...nigel.se>,
	Al Viro <viro@....linux.org.uk>,
	Phillip Susi <psusi@....rr.com>,
	Bill Davidsen <davidsen@....com>, majkls <majkls@...pere.com>,
	linux-kernel@...r.kernel.org
Subject: Re: sys_chroot+sys_fchdir Fix

Adrian Bunk wrote:
> You are claiming "They went so far as to say that dot-dot wouldn't let 
> you out"?
>   

I phrased it in a somewhat conversational way.  The promise, which I've 
now quoted from multiple sources, is expressed variously, including:
> The dot-dot entry in the root directory is interpreted to mean the root directory itself. Thus, dot-dot cannot be used to access files outside the subtree rooted at the root directory.
>   
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