Hi Christian, This patch: [root at raven linux]# git bisect bad 90f362bdf0d0d06a126a5fd35b084436dd8250ad is the first bad commit commit 90f362bdf0d0d06a126a5fd35b084436dd8250ad Author: Christian König <christian.koenig at amd.com> Date: Mon Jul 16 14:58:48 2018 +0200 drm/amdgpu: change ring priority after pushing the job Pushing a job can change the ring assignment of an entity. Signed-off-by: Christian König <christian.koenig at amd.com> Reviewed-by: Chunming Zhou <david1.zhou at amd.com> :040000 040000 9a09d3e9d055e4f5024019861c334ee9cc0bd11b 522540c31c3d1a4f4a6fbac75e985e9a7f7e93c9 M drivers causes a KASAN while running piglit. It's reproduceable 100% of the time. The commit before this doesn't not cause a KASAN. Tom