[PATCH 06/26] drm/radeon: fix a critical bug in the SA code

Christian König deathsimple at vodafone.de
Wed Apr 25 08:38:01 PDT 2012

On 25.04.2012 16:34, Jerome Glisse wrote:
> On Wed, Apr 25, 2012 at 9:40 AM, Alex Deucher<alexdeucher at gmail.com>  wrote:
>> On Wed, Apr 25, 2012 at 9:19 AM, Michel Dänzer<michel at daenzer.net>  wrote:
>>> On Mit, 2012-04-25 at 14:46 +0200, Christian König wrote:
>>>> Aligning offset can make it bigger than tmp->offset
>>>> leading to an overrun bug in the following subtraction.
>>>> Signed-off-by: Christian König<deathsimple at vodafone.de>
>>> Please add
>>> Cc: stable at vger.kernel.org
>>> to the commit log (but don't send the patch to that address during
>>> review). That way, once Linus merges the fix, it'll be picked up for the
>>> 3.3.y stable tree.
>>> With that addition,
>>> Reviewed-by: Michel Dänzer<michel.daenzer at amd.com>
>> Reviewed-by: Alex Deucher<alexander.deucher at amd.com>
>> This should probably go in now via drm-fixes (with stable cced).  Might fix:
>> https://bugs.freedesktop.org/show_bug.cgi?id=45018
>> Alex
> I don't think this patch fix anything, as up until now they all used
> same alignment.
Correct, as I allready mentioned in the other mail: The VM code and the 
IB code do use different alignments, but they also use different 
instances of SA manager. So that problem won't hurt us in the current 


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