[drm/ttm] Memory corruption problem when ttm_tt_init() fails.

[Dave Airlie]

On Wed, 15 Jul 2020 at 17:00, Tetsuo Handa
<penguin-kernel at i-love.sakura.ne.jp> wrote:
>
> On 2020/07/14 18:13, Gu Jinxiang wrote:
> > I've encountered [BUG: unable to handle kernel NULL pointer dereference at] which has call stack like your pattern2.
> > And before this happended, I got a lot of memory allocation failure warnings.
> > And my kernel is 3.10.0-327.62.1.el7.x86_64.
> >
> > Since, you mentioned it may be a bug of drm/tmm. So, I checked drm/ttm for possible patch to fix this problem, but found nothing.
> > Could you please tell me is there any progress of this problem that you detected.
>
> I'm not aware of any progress on https://patchwork.kernel.org/patch/5681611/ .

Just found this email, I've hopefully fix this issue in my drm-next tree with

https://patchwork.freedesktop.org/patch/380782/

Dave.