linux-kernel - Re: Top kernel oopses/warnings for the week of May 30th 2008

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Date:	Sun, 01 Jun 2008 19:27:21 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	James Morris <jmorris@...ei.org>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, Greg KH <greg@...ah.com>,
	Hugh Dickins <hugh@...itas.com>, Jeff Garzik <jeff@...zik.org>
Subject: Re: Top kernel oopses/warnings for the week of May 30th 2008

James Morris wrote:
> On Fri, 30 May 2008, Arjan van de Ven wrote:
> 
>> Rank 4: task_has_capability (warning)
>> 	Reported 181 times (202 total reports)
>> 	[out of tree] Bug in the proprietary firegl driver
>> 	warning only shows up in tainted kernels
>> 	This warning was last seen in version 2.6.25.3, and first seen in
>> 	2.6.25.
>> 	More info:
>> 	http://www.kerneloops.org/searchweek.php?search=task_has_capability
> 
> This is a shining example of why people should avoid binary drivers.  I'd 
> guess that the bug is related to the new 64-bit capability code.
> 
> It'd be really interesting to know what this driver is doing with 
> capabilities in the first place.

it's easy; it's making the user root via the following function:

void ATI_API_CALL KCL_PosixSecurityCapSetEffectiveVector(KCL_TYPE_Cap cap)
{
	capt_t(current->cap_effective) = cap;
}

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