uvm_fault(0xfffffd800eb919a8, 0x18, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff81de4b9a cs 8 rflags 10246 cr2 18 cpl 0 rsp ffff80002a3228f0
gsbase 0xffffffff837d6ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff81de4b9a
Starting stack trace...
panic(ffffffff833cb830) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80002a322840) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
fill_kproc(ffff8000fffef9d8,ffff800000afb400,deaf4152deaf4152,0) 
at fill_kproc+0x4a
sysctl_doproc(ffff80002a322d78,4,200000000100,ffff80002a322da8) at sysctl_doproc+0x6e6 sys/kern/kern_sysctl.c:2014
kern_sysctl_dirs(42,ffff80002a322d78,4,200000000100,ffff80002a322da8,0,65e9593bf9313f69,ffff80002a322d78) at kern_sysctl_dirs+0x375 sys/kern/kern_sysctl.c:442
kern_sysctl(ffff80002a322d74,5,200000000100,ffff80002a322da8,0,fffffffffffffe53,3e35355f92041360) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:733
sys_sysctl(ffff80003c424d20,ffff80002a322ee0,ffff80002a322e30) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80002a322ee0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a322ee0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7fbda4287f0, count: 247
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 0d5ef51b-0062-dd1a-a10b-15f17b148763
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 0x000f26e0: 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