linux-kernel - Re: Please revert 21564fd2a3deb48200b595332f9ed4c9f311f2a7

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Message-ID: <46923E37.9010303@goop.org>
Date:	Mon, 09 Jul 2007 06:55:03 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Adrian Bunk <bunk@...sta.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...e.de>,
	Ingo Molnar <mingo@...e.hu>,
	Christoph Hellwig <hch@...radead.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: Please revert 21564fd2a3deb48200b595332f9ed4c9f311f2a7

Alan Cox wrote:
> 2.6.22's behaviour is the bug. 2.6.21 you couldn't load random binary
> crap into the kernel without logging a taint. 2.6.22 you can. This means
> every single 2.6.22 bug report has to be assumed to be caused by binary
> module crap as a starting point which slows down debug immensely.

Er, what?  What do you mean by "load random binary crap"?  Are you 
worried that a malicious kernel module might modify paravirt_ops?  How 
is that different from a malicious module doing any of the infinite 
other things a malicious module can do?  A module will only register a 
taint if its playing by the rules anyway, and a module playing by the 
rules won't touch paravirt_ops directly.

    J

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