When the failure occurs, the kernel debugger ddb(4) tries to explain the problem.
The first message: I am hopeful that it told you "kernel: page fault trap" and that the output on screen was clear, and not how you typed it in your post above. If the message had mixed up characters, this tends to indicate hardware trouble.
The second message indicates where in the kernel the page fault occurred. A problem report to the OpenBSD project would need a backtrace and a dmesg(8) at minimum. The crash(8) and ddb(4) man pages can help with this.
It might be possible to successfully boot the GENERIC kernel in single-user mode. If so, you could obtain and share a dmesg(8) that way.
boot> -s
If not, a dmesg() from the RAMDISK kernel may stilll have value. Select the shell at the Install, Upgrade, Shell prompt. Output the dmesg to a file on a manually mounted USB stick.
boot> bsd.rd
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