Created attachment 288139 [details] dmesg output since usermode crash that caused bug When a user-mode program crashes while using amdgpu resources amdgpu fails to pin userptr then segfaults in the GPU scheduler. This occured while attempting to port a program to use Wayland and Vulkan on AMD Ryzen 3700X and AMD RX580 using unmodified amdgpu drivers.
Can you try on 5.6 kernel. Fixes for userptr where submitted and merged into that release and I think are lined up for 5.5.14
5.5.14 is out and should contain the fixes for the above https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.5.y&id=aeeda19db4ab8b8e5bf653835058728ebe26909f https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.5.y&id=834de33d3c387345a4eb7511d039742fa91f87c5 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.5.y&id=9f22030d75b2e9ee7d700c5e1837b050282668a1
5.5.14 fixes this issue (though I can't use 5.6.1 for an unrelated bug) Thank you