Josh Rickmar writes:
> On Fri, May 07, 2021 at 04:19:18PM -0400, Dave Voutila wrote: >> >> Josh Rickmar writes: >> >> >>Synopsis: vmm protection fault trap >> >>Category: vmm >> >>Environment: >> > System : OpenBSD 6.9 >> > Details : OpenBSD 6.9-current (GENERIC.MP) #6: Thu May 6 10:16:53 >> > MDT 2021 >> > >> > [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP >> > >> > Architecture: OpenBSD.amd64 >> > Machine : amd64 >> >>Description: >> > >> > My nixos vm is causing the host kernel to crash (after cold boot) with >> > 'protection fault trap, code=0'. The guest is running Linux 5.11.14 >> > (guest dmesg included after the host dmesg below). I've also attached >> > a screenshot of ddb showing the backtrace and registers. >> > >> >>How-To-Repeat: >> > >> > The crash can be reliably triggered by doing heavy disk IO on the vm. >> > Upgrading the VM actually got the nixos install wedged during an >> > initial crash, and attempting to repair it with "nix-build -A system >> > '<nixpkgs/nixos>' --repair" is reliably repeating the crash. >> >> Any chance you've experienced this with a non-NixOS guest? I can't >> reproduce this error on my Ryzen5 Pro host. >> I've reproduced this locally with the help of abieber@. Seems I just need to boot a nixos iso (nixos-21.05pre287333.63586475587-x86_64) and try installing a package like git into the ramdisk: # nix-env -f '<nixpkgs>' -iA git I still haven't triggered this without nixos, but at least I can reproduce it locally now. :-) -dv
