panic: trap type 4, code=0, pc=ffffffff8124e9f0
Starting stack trace...
panic(ffffffff823b5706) at panic+0x14c sys/kern/subr_prf.c:218
kerntrap(ffff80002129a870) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:316
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pfi_ifhead_RB_REMOVE(ffffffff828c9528,ffff800000b63c00) at pfi_ifhead_RB_REMOVE+0x50 sys/net/pf_if.c:80
pfi_detach_ifgroup(ffff800000b33b80) at pfi_detach_ifgroup+0x11b pfi_kif_unref sys/net/pf_if.c:211 [inline]
pfi_detach_ifgroup(ffff800000b33b80) at pfi_detach_ifgroup+0x11b sys/net/pf_if.c:304
if_delgroup(ffff800000b3e000,ffff800000b33b80) at if_delgroup+0x193 sys/net/if.c:2679

if_detach(ffff800000b3e000) at if_detach+0x1ab sys/net/if.c:1042
tun_clone_destroy(ffff800000b3e000) at tun_clone_destroy+0x1e1 sys/net/if_tun.c:325
if_clone_destroy(ffff80002129ab20) at if_clone_destroy+0x146 sys/net/if.c:1201
tun_dev_close(5d00,7) at tun_dev_close+0x140 sys/net/if_tun.c:476
spec_close(ffff80002129abf0) at spec_close+0x311 sys/kern/spec_vnops.c:560
VOP_CLOSE(fffffd806e7d7828,7,fffffd807f7b7a20,ffff80002123ca58) at VOP_CLOSE+0xeb sys/kern/vfs_vops.c:177
vn_closefile(fffffd806c83f438,ffff80002123ca58) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd806c83f438,ffff80002123ca58) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614
fdrop(fffffd806c83f438,ffff80002123ca58) at fdrop+0xc2 sys/kern/kern_descrip.c:1279
closef(fffffd806c83f438,ffff80002123ca58) at closef+0x11c sys/kern/kern_descrip.c:1263
fdfree(ffff80002123ca58) at fdfree+0xf4 sys/kern/kern_descrip.c:1195
exit1(ffff80002123ca58,0,19,1) at exit1+0x340 sys/kern/kern_exit.c:197
postsig(ffff80002123ca58,19) at postsig+0x59c sigexit sys/kern/kern_sig.c:1494 [inline]
postsig(ffff80002123ca58,19) at postsig+0x59c sys/kern/kern_sig.c:1423
userret(ffff80002123ca58) at userret+0x189 sys/kern/kern_sig.c:1914
syscall(ffff80002129b070) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline]
syscall(ffff80002129b070) at syscall+0x55c sys/arch/amd64/amd64/trap.c:612
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffebd10, count: 236
End of stack trace.
syncing disks...21 21 21 21 21 21 21 21 set $lines = 0
21 21 21 set $maxwidth = 0
21 21 show panic
21 21 trace
21 21 show registers
21 show proc
21 21 ps
 giving up

dump to dev 4,1 not possible
rpeabnoioct:i nkegr..ne.
l diagnostiSeaBIOS (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 003a59b7-54eb-38ca-1cfb-72bc238e03e5
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=2097152 = 1024 MiB
drive 0x000f2310: PCHS=0/0/0 translation=lba LCHS=1024/32/63 s=2097152
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.52
boot> show malloc
boot: illegal argument malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace