uvm_fault(0xfffffd807eb93e10, 0xf, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff813bb568 cs 8 rflags 10246 cr2 f cpl 0 rsp ffff80003
ca3b430
gsbase 0xffffffff837f6ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff813bb568
Starting stack trace...
panic(ffffffff832fe563) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003ca3b380) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
ktrops(ffff80002a7e2f78,ffffffffffffffff,0,c0000530,fffffd806e3faa78,fffffd807f7d7208) at ktrops+0x58 ktrcanset sys/kern/kern_ktrace.c:727 [inline]
ktrops(ffff80002a7e2f78,ffffffffffffffff,0,c0000530,fffffd806e3faa78,fffffd807f7d7208) at ktrops+0x58 sys/kern/kern_ktrace.c:570
doktrace(fffffd806e3faa78,4,40000530,0,ffff80002a7e2f78) at doktrace+0x6dd ktrsetchildren sys/kern/kern_ktrace.c:595 [inline]
doktrace(fffffd806e3faa78,4,40000530,0,ffff80002a7e2f78) at doktrace+0x6dd sys/kern/kern_ktrace.c:517
sys_ktrace(ffff80002a7e2f78,ffff80003ca3b790,ffff80003ca3b6e0) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:558
syscall(ffff80003ca3b790) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003ca3b790) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7fbcd371560, 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 1498d526-897b-4d0e-28be-a262cd523d51
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 0x000f2820: 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 $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