linux-kernel - Re: Chroot bug

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Message-ID: <46F99EDE.70905@davidnewall.com>
Date:	Wed, 26 Sep 2007 09:20:54 +0930
From:	David Newall <david@...idnewall.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	"Serge E. Hallyn" <serge@...lyn.com>,
	Bill Davidsen <davidsen@....com>,
	Philipp Marek <philipp@...ek.priv.at>, 7eggert@....de,
	majkls <majkls@...pere.com>, bunk@...tum.de,
	linux-kernel@...r.kernel.org
Subject: Re: Chroot bug

Alan Cox wrote:
> On Wed, 26 Sep 2007 01:05:07 +0930
> David Newall <david@...idnewall.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.
>   

Good call.  Though I suppose, since it's used 24x7 to aid security on 
countless production servers, that security dwarfs testing.  Still, 
debugging, yes that's valid.

I don't suppose it makes and difference; whatever the purpose, a chroot 
that doesn't change the root is buggy.
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