uvm_fault(0xfffffd806bd447a0, 0x0, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff811d8b50 cs 8 rflags 10246 cr2 0 cpl 0 rsp ffff80002a7d2ad0
gsbase 0xffffffff837b7ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff811d8b50
Starting stack trace...
panic(ffffffff83329250) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80002a7d2a20) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dt_ioctl_record_stop(ffff80000162d000) at 
dt_ioctl_record_stop+0xf0
dtclose(11e5f,81,2000,ffff80003c4199e0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff80003c4199e0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232
spec_close(ffff80002a7d2bd0) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd806de7c510,81,fffffd807f7d2340,ffff80003c4199e0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd805f1613a0,ffff80003c4199e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd805f1613a0,ffff80003c4199e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd805f1613a0,ffff80003c4199e0) at fdrop+0x126 sys/kern/kern_descrip.c:1265
closef(fffffd805f1613a0,ffff80003c4199e0) at closef+0x192 sys/kern/kern_descrip.c:1249
fdfree(ffff80003c4199e0) at fdfree+0x116 sys/kern/kern_descrip.c:1181
exit1(ffff80003c4199e0,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214
sys_exit(ffff80003c4199e0,ffff80002a7d2f40,ffff80002a7d2e90) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a7d2f40) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a7d2f40) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7d6f0e57cd70, count: 242
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 2c48b237-609e-0a7d-d6ca-08d70f46a694
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 $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