ttm crash on init

[Christian König]

Am 17.09.2018 um 19:50 schrieb Tom St Denis:
> On 2018-09-17 1:45 p.m., Christian König wrote:
>> Mhm, not the slightest idea.
>>
>> That nearly looks like adev->stolen_vga_memory already contains 
>> something.
>
> Nope,
>
> [   51.564605] >>>adev->stolen_vga_memory == (null)
> [   51.564619] kasan: CONFIG_KASAN_INLINE enabled
> [   51.564877] kasan: GPF could be caused by NULL-ptr deref or user 
> memory access
> [   51.565071] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC 
> KASAN NOPTI
> [   51.565254] CPU: 6 PID: 3863 Comm: modprobe Not tainted 4.19.0-rc1+ 
> #30
> [   51.565425] Hardware name: System manufacturer System Product 
> Name/TUF B350M-PLUS GAMING, BIOS 4011 04/19/2018
> [   51.565714] RIP: 0010:amdgpu_bo_create_kernel+0x59/0x1a0 [amdgpu]
>
> That's me printing out the value of the value for stolen_vga_memory 
> before the call to allocate it.

What does amdgpu_bo_create_kernel+0x59 points to?

Christian.

>
> Tom
>
>
>>
>> Christian.
>>
>> Am 17.09.2018 um 18:47 schrieb Tom St Denis:
>>> On 2018-09-17 12:21 p.m., Tom St Denis wrote:
>>>> (attached).  I'll try to bisect in a second.  Is anyone aware of this?
>>>>
>>>> Tom
>>>
>>> Bisection led to:
>>>
>>> a327772a5655ff4fb104c8aae6515faa461df466 is the first bad commit
>>> commit a327772a5655ff4fb104c8aae6515faa461df466
>>> Author: Christian König <christian.koenig at amd.com>
>>> Date:   Fri Sep 14 21:06:50 2018 +0200
>>>
>>>     drm/amdgpu: drop size check
>>>
>>>     We no don't allocate zero sized kernel BOs any longer.
>>>
>>>     Signed-off-by: Christian König <christian.koenig at amd.com>
>>>     Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
>>>
>>> :040000 040000 265e4fa231d367d354e4c66600b8f98a4d2f04c4 
>>> 3702baaeb2423361dcd7eac8c533edace760ae3e M      drivers
>>>
>>>
>>> As the culprit.
>>>
>>> Cheers,
>>> Tom
>>
>
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