uvm_fault(0xfffffc800b1cb3d0, 0xf, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff81ebdba8 cs 8 rflags 10246 cr2 f cpl 0 rsp ffff80003c421590
gsbase 0xffffffff83982ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff81ebdba8
Starting stack trace...
panic(ffffffff834f0fd3) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80003c4214e0) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
ktrops(ffff800045fee2b0,ffffffffffffffff,0,a0c7ff9d,fffffc806ca490d8,fffffc80097fd410) at ktrops+0x58 ktrcanset sys/kern/kern_ktrace.c:728 [inline]
ktrops(ffff800045fee2b0,ffffffffffffffff,0,a0c7ff9d,fffffc806ca490d8,fffffc80097fd410) at ktrops+0x58 sys/kern/kern_ktrace.c:571
doktrace(fffffc806ca490d8,4,20c7ff9d,0,ffff800045fee2b0) at doktrace+0x6bd ktrsetchildren sys/kern/kern_ktrace.c:596 [inline]
doktrace(fffffc806ca490d8,4,20c7ff9d,0,ffff800045fee2b0) at doktrace+0x6bd sys/kern/kern_ktrace.c:518
sys_ktrace(ffff800045fee2b0,ffff80003c421900,ffff80003c421850) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:559
syscall(ffff80003c421900) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c421900) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfdcd40c6310, 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 fe2172e1-0ae4-3e3c-d45b-fa0270c0bf41
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 0x000f2600: 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> show kasan
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