uvm_fault(0xffffffff83522150, 0xffff8000295a2004, 0, 1) -> d
fatal page fault in supervisor mode
trap type 6
 code 0 rip ffffffff815417d1 cs 8 rflags 10202 cr2 ffff8000295a2004 cpl 0 rsp ffff80003763f960
gsbase 0xffffffff83473ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff815417d1
Starting stack trace...
panic(ffffffff82fb5e8a) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003763f8b0) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279
VOP_LOOKUP(fffffd806c7a7018,ffff80003763fc58,ffff80003763fc88) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80003763fc28) at vfs_lookup+0x8e1 sys/kern/vfs_lookup.c:566
namei(ffff80003763fc28) at namei+0x7aa sys/kern/vfs_lookup.c:250
dounlinkat(ffff80002a48c018,ffffff9c,20000040,0) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852
syscall(ffff80003763fe00) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb460a774b30, 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 016acda6-80d9-6675-f1e2-930bbf0c87d3
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 $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