linux-kernel - Re: v2.6.38-rc5 drm:radeon regression

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Message-Id: <201102212103.40923.maciej.rutecki@gmail.com>
Date:	Mon, 21 Feb 2011 21:03:40 +0100
From:	Maciej Rutecki <maciej.rutecki@...il.com>
To:	Jörg Otte <jrg.otte@...glemail.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: v2.6.38-rc5 drm:radeon regression

I created a Bugzilla entry at 
https://bugzilla.kernel.org/show_bug.cgi?id=29632
for your bug report, please add your address to the CC list in there, thanks!

On piątek, 18 lutego 2011 o 12:47:56 Jörg Otte wrote:
> Reaching the desktop in v2.6.38-rc5 I only see the background.
> No Icon,widgets,windows etc. I am under the impression
> that everything is there - but invisible.
> 
> HW is Thinkpad T43 with Mobility Radeon X300 graphic.
> 
> Switching to the command line I see drm:radeon
> displaying permanently :
> drm:radeon_cs_ioctl          error invalid command stream
> drm:r100_cd_track_check  no buffer for AA resolve buffer
> 
> I bisected the problem to:
> 
> fff1ce4dc6113b6fdc4e3a815ca5fd229408f8ef is the first bad commit
> commit fff1ce4dc6113b6fdc4e3a815ca5fd229408f8ef
> Author: Marek Olšák <maraeo@...il.com>
> Date:   Mon Feb 14 01:01:10 2011 +0100
> 
>     drm/radeon/kms: check AA resolve registers on r300
> 
>     This is an important security fix because we allowed arbitrary values
>     to be passed to AARESOLVE_OFFSET. This also puts the right buffer
> address in the register.
> 
>     Signed-off-by: Marek Olšák <maraeo@...il.com>
>     Signed-off-by: Dave Airlie <airlied@...hat.com>
> 
> :040000 040000 c3a86a556f8c4ee1313bdc12e1f86cb44bacb742
> 
> 5b872a00532f36c0514790223375f1377a588501 M drivers

-- 
Maciej Rutecki
http://www.maciek.unixy.pl
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