linux-kernel - Re: [ 086/149] video:uvesafb: Fix oops that uvesafb try to execute NX-protected page

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Message-ID: <4F777316.9090406@gmx.de>
Date:	Sat, 31 Mar 2012 21:11:50 +0000
From:	Florian Tobias Schandinat <FlorianSchandinat@....de>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Greg KH <gregkh@...uxfoundation.org>, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, Wang YanQing <udknight@...il.com>
Subject: Re: [ 086/149] video:uvesafb: Fix oops that uvesafb try to execute
 NX-protected page

On 03/31/2012 08:37 PM, Alan Cox wrote:
> On Sat, 31 Mar 2012 11:03:17 -0700
> Greg KH <gregkh@...uxfoundation.org> wrote:
> 
>> On Fri, Mar 30, 2012 at 09:30:52PM +0000, Florian Tobias Schandinat wrote:
>>> Hi Greg,
>>>
>>> On 03/30/2012 07:49 PM, Greg KH wrote:
>>>> 3.2-stable review patch.  If anyone has any objections, please let me know.
>>>
>>> the same as for 3.3: This patch would require exporting
>>> 'pcibios_enabled' to not break building uvesafb as a module. As Alan did
>>> not agree with this approach it is not suitable for stable as is.
>>
>> Oops, sorry about that, now removed, thanks for letting me know.
> 
> Actually for the backport its probably the right thing to do - its
> simple, clear and slightly ugly, but its fairly provably safe.

Is there a problem with using your preferred solution
"__supported_pte_mask & _PAGE_NX" here?
As far as I can see it should work since 2008.


Best regards,

Florian Tobias Schandinat
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