BUG: KASAN: use-after-free in amdgpu_job_free_cb

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On 2018 Jan 14, Grodzovsky, Andrey wrote:
> To be sure it was inserted at the correct place please send me output of git diff on your modified branch.
> 
> Thanks,
> Andrey
> 

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index bb5fa895fb64..bc2050a5a5c6 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4802,7 +4802,7 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
         * synchronization events.
         */

-       if (lock_and_validation_needed) {
+       if (lock_and_validation_needed || state->legacy_cursor_update == true) {

                ret = do_aquire_global_lock(dev, state);
                if (ret)

If this matters, I've applied the patch on top of 4.15-rc7 with your 
"Fix: Save job's priority on it's creation instead of accessing it from s_entity later on." 
patch. This one is still not upstream, but without I see the other
use-after-free

-- 
Regards,
  Johannes



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