panic: trap type 6, code=10, pc=0
Starting stack trace...
panic(ffffffff82fd929f) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff800032254630) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
0(b,ffff8000322547f8,83,ffff800032254898,0,b) at 0
rt_clone(ffff800032254908,ffff800032254a08,0) at rt_clone+0x98 sys/net/route.c:383
route_mpath(ffff8000322549f0,fffffd807240abf0,fffffd807240abec,0) at route_mpath+0x170 rt_match sys/net/route.c:360 [inline]
route_mpath(ffff8000322549f0,fffffd807240abf0,fffffd807240abec,0) at route_mpath+0x170 rtalloc_mpath sys/net/route.c:476 [inline]
route_mpath(ffff8000322549f0,fffffd807240abf0,fffffd807240abec,0) at route_mpath+0x170 sys/net/route.c:255
in_ouraddr(fffffd807240ab00,ffff8000011cb800,ffff8000322549f0,0) at in_ouraddr+0xc2
ip_input_if(ffff800032254ae8,ffff800032254af4,ffff80002ac1c000,0,ffff8000011cb800) at ip_input_if+0x422 sys/netinet/ip_input.c:508
ipv4_input(ffff8000011cb800,fffffd807240ab00) at ipv4_input+0x50 sys/netinet/ip_input.c:337
ether_input(ffff8000011cb800,fffffd807240ab00) at ether_input+0x6e4
tun_dev_write(5d05,ffff800032254e68,ffff80002ac1c000,2) at tun_dev_write+0x301 sys/net/if_tun.c:914
spec_write(ffff800032254cc0) at spec_write+0x120 sys/kern/spec_vnops.c:302
VOP_WRITE(fffffd80769c4210,ffff800032254e68,11,fffffd807f7d3548) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245
vn_write(fffffd8071c50000,ffff800032254e68,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408
dofilewritev(ffff800029fd9be0,c8,ffff800032254e68,0,ffff800032254f20) at dofilewritev+0x23c sys/kern/sys_generic.c:380
sys_write(ffff800029fd9be0,ffff800032254fd0,ffff800032254f20) at sys_write+0xa2 sys/kern/sys_generic.c:300
syscall(ffff800032254fd0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff800032254fd0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb13918479e0, count: 239
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 dc1537e2-3f8b-09d0-7a97-ada6c38139e5
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 $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