uvm_fault(0xffffffff838e6318, 0xffff80002a888e88, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff81ad533e cs 8 rflags 10297 cr2 ffff80002a888e88 cpl 0 rsp ffff80003c95d390
gsbase 0xffffffff8385aff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff81ad533e
Starting stack trace...
panic(ffffffff8338d890) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003c95d2e0) at kerntrap+0x2fb
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
mtx_enter(ffff80002a888e88) at mtx_enter+0x6e sys/kern/kern_lock.c:545
filt_procdetach(fffffd80706b0008) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff80003c94b248,fffffd806edaac38,fffffd806edaacb0,0,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline]
knote_remove(ffff80003c94b248,fffffd806edaac38,fffffd806edaacb0,0,1) at knote_remove+0x22e sys/kern/kern_event.c:2154
kqueue_purge(ffff80003c94b248,fffffd806edaac38) at kqueue_purge+0x117 sys/kern/kern_event.c:1890
kqueue_close(fffffd806cd49178,ffff80003c94b248) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd806cd49178,ffff80003c94b248) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd806cd49178,ffff80003c94b248) at closef+0x190 sys/kern/kern_descrip.c:1264
fdfree(ffff80003c94b248) at fdfree+0x115 sys/kern/kern_descrip.c:1195
exit1(ffff80003c94b248,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff80003c94b248,ffff80003c95d7b0,ffff80003c95d700) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c95d7b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c95d7b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x778b3992d130, 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 1f64d870-06f2-d8bf-7327-adc6877a2997
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