uvm_fault(0xfffffd8072b752f0, 0x58, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff813fbf75 cs 8 rflags 10246 cr2 58 cpl 0 rsp ffff800022f15230
gsbase 0xffff800020d38ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff813fbf75
Starting stack trace...
panic(ffffffff82454cd0) at panic+0x16b sys/kern/subr_prf.c:233
kerntrap(ffff800022f15180) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:313
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
rtm_output(ffff800000bdaf00,ffff800022f15378,ffff800022f152d8,8,0) at rtm_output+0x3d5 sys/net/rtsock.c:1035
route_output(fffffd80762b0100,fffffd8069cac7e0,0,0) at route_output+0x6b8 sys/net/rtsock.c:864
route_usrreq(fffffd8069cac7e0,9,fffffd80762b0100,0,0,ffff8000212707e8) at route_usrreq+0x391 sys/net/rtsock.c:283
sosend(fffffd8069cac7e0,0,ffff800022f15580,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:573
sendit(ffff8000212707e8,6,ffff800022f15660,0,ffff800022f15740) at sendit+0x589 sys/kern/uipc_syscalls.c:653
sys_sendto(ffff8000212707e8,ffff800022f156f8,ffff800022f15740) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:520
syscall(ffff800022f157c0) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800022f157c0) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x9bde1ab6930, count: 246
End of stack trace.

dump to dev 4,1 not possible
rpeabonoict:in gk.e.rn.e
l diagnosticSeaBIOS (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 facdd91b-51c3-88c8-dda6-9406d7e40e23
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 0x000f2430: 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 3.53
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