bisected:
--------------------------------------------------------------------------------
commit cbf0bb7f192b814be84dff538fb90dacf65958c7
Author: Christian König <christian.koenig@amd.com>
Date:   Thu Aug 2 10:45:19 2018 +0200

    amdgpu: always add all BOs to handle table

    This way we can always find a BO structure by its handle.

    Signed-off-by: Christian König <christian.koenig@amd.com>
    Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
    Reviewed-and-Tested-by: Junwei Zhang <Jerry.Zhang@amd.com>
--------------------------------------------------------------------------------
I am currently running libdrm from the commit right before this one, no pb so
far.