[johnnym]

Got a working reproducer that can be used in single user mode to trigger the issue:

Executing /usr/sbin/sshd seems to change something important, because afterwards executing binaries that ran perfectly well before leads to segfaults, bus errors or illegal instruction faults (depending on userland and boot from disk or network). Things that keep working afterwards are the running shell and commands like halt and reboot.

This is reproducible for both boot from disk and boot from network and for both OpenBSD/sgi 6.9 and /octeon 7.2 userlands. I've detailed things in this issue over at GitHub.

Not sure what to do next. I don't think I can bisect between two branches (sgi-is-alive-7.1 and sgi-is-alive-7.2), also because of the way I restored sgi functionality on top of the respective release commit. Unless I start from 7.1 and apply the patches in each bisect step - that could take a while...