Oops (NULL pointer dereference) in radeon_fence_ref in 3.14.63

[Michel Dänzer]

On 08.03.2016 11:54, Nicolai Hähnle wrote:
> On 05.03.2016 16:24, Christian König wrote:
>> just an educated guess, but I think the problem is simply that kernel
>> 3.14 doesn't yet contain the code so that radeon_fence_get() can safely
>> called with a NULL pointer.
>>
>> So the backport of Nicolai's patch needs and extra check for the case
>> when the fence is NULL.
> 
> Oops indeed. Only the ref call should need the guard, the unref has
> always had a NULL pointer test as far as I can see.
> 
> Lutz, could you please test whether the attached patch on top of 3.14.63
> fixes the problem?

Nicolai, if you haven't already, please send this patch to
stable at vger.kernel.org with an explicit explanation of which stable
branches need it.


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer