uvm_fault(0xfffffd806c383c58, 0xf, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff816381a8 cs 8 rflags 10246 cr2 f cpl 0 rsp ffff800030983590
gsbase 0xffffffff83441ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff816381a8
Starting stack trace...
panic(ffffffff82fe8080) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff8000309834e0) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
ktrops(ffff800030984f70,ffffffffffffffff,0,80000002,fffffd805e01db38,fffffd807f7d3340) at ktrops+0x58 ktrcanset sys/kern/kern_ktrace.c:718 [inline]
ktrops(ffff800030984f70,ffffffffffffffff,0,80000002,fffffd805e01db38,fffffd807f7d3340) at ktrops+0x58 sys/kern/kern_ktrace.c:561
doktrace(fffffd805e01db38,4,2,0,ffff800030984f70) at doktrace+0x6dd ktrsetchildren sys/kern/kern_ktrace.c:586 [inline]
doktrace(fffffd805e01db38,4,2,0,ffff800030984f70) at doktrace+0x6dd sys/kern/kern_ktrace.c:508
sys_ktrace(ffff800030984f70,ffff8000309838f0,ffff800030983840) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:549
syscall(ffff8000309838f0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff8000309838f0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xaaf67ba7e40, count: 249
End of stack trace.

dump to dev 4,1 not possible
rebooting...
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID 43b93b83-f320-801a-a1ee-23eab263a335
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f27c0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.67
boot> set $lines = 0
set: syntax error
boot> set $maxwidth = 0
set: syntax error
boot> show panic
boot: illegal argument panic
boot> trace
boot> show registers
boot> show proc
boot> ps
boot> show all locks
boot> show malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace