panic: trap type 4, code=0, pc=ffffffff81b14890
Starting stack trace...
panic(ffffffff823b158e) at panic+0x14c sys/kern/subr_prf.c:218
kerntrap(ffff80002128e930) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:316
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pfi_ifhead_RB_REMOVE(ffffffff82916f70,ffff800000b99e00) at pfi_ifhead_RB_REMOVE+0x50 sys/net/pf_if.c:80
pfi_detach_ifgroup(ffff800000b68d00) at pfi_detach_ifgroup+0x11b pfi_kif_unref sys/net/pf_if.c:211 [inline]
pfi_detach_ifgroup(ffff800000b68d00) at pfi_detach_ifgroup+0x11b sys/net/pf_if.c:304
if_delgroup(ffff800000b61000,ffff800000b68d00) at if_delgroup+0x193 sys/net/if.c:2679
if_detach(ffff800000b61000) at if_detach+0x1ab sys/net/if.c:1042
tun_clone_destroy(ffff800000b61000) at tun_clone_destroy+0x1e1 sys/net/if_tun.c:325
if_clone_destroy(ffff80002128ebe0) 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(ffff80002128ecb0) at spec_close+0x311 sys/kern/spec_vnops.c:560
VOP_CLOSE(fffffd806ed7a758,7,fffffd807f7b7780,ffff80002123c2a0) at VOP_CLOSE+0xeb sys/kern/vfs_vops.c:177
vn_closefile(fffffd80657d2980,ffff80002123c2a0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd80657d2980,ffff80002123c2a0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614
fdrop(fffffd80657d2980,ffff80002123c2a0) at fdrop+0xc2 sys/kern/kern_descrip.c:1279
closef(fffffd80657d2980,ffff80002123c2a0) at closef+0x11c sys/kern/kern_descrip.c:1263
fdfree(ffff80002123c2a0) at fdfree+0xf4 sys/kern/kern_descrip.c:1195
exit1(ffff80002123c2a0,0,0,1) at exit1+0x335 sys/kern/kern_exit.c:200
sys_exit(ffff80002123c2a0,ffff80002128ef40,ffff80002128ef90) at sys_exit+0x16 sys/kern/kern_exit.c:96
syscall(ffff80002128f010) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002128f010) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffbd680, count: 237
End of stack trace.
syncing disks...panic: ffs_update: bad link cnt
Starting stack trace...
panic(ffffffff82443e3e) at panic+0x14c sys/kern/subr_prf.c:218
ffs_update(fffffd806ee55de0,0) at ffs_update+0x323 sys/ufs/ffs/ffs_inode.c:101
VOP_FSYNC(fffffd806f0f1de0,fffffd807f7b7780,2,ffff80002123c2a0) at VOP_FSYNC+0xd5 sys/kern/vfs_vops.c:362
ffs_sync_vnode(fffffd806f0f1de0,ffff80002128e640) at ffs_sync_vnode+0x18a sys/ufs/ffs/ffs_vfsops.c:1194
vfs_mount_foreach_vnode(ffff8000006bdc00,ffffffff81555a30,ffff80002128e640) at vfs_mount_foreach_vnode+0x55 sys/kern/vfs_subr.c:885
ffs_sync(ffff8000006bdc00,2,0,fffffd807f7b7780,ffff80002123c2a0) at ffs_sync+0x100 sys/ufs/ffs/ffs_vfsops.c:1245
sys_sync(ffff80002123c2a0,0,0) at sys_sync+0xbc sys/kern/vfs_syscalls.c:540
vfs_syncwait(ffff80002123c2a0,1) at vfs_syncwait+0x36
vfs_shutdown(ffff80002123c2a0) at vfs_shutdown+0x5d sys/kern/vfs_subr.c:1750
boot(100) at boot+0xc7 sys/arch/amd64/amd64/machdep.c:837
cypress_enable_spread_spectrum(100,100) at cypress_enable_spread_spectrum
panic(ffffffff823b158e) at panic+0x154 sys/kern/subr_prf.c:214
kerntrap(ffff80002128e930) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:316
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pfi_ifhead_RB_REMOVE(ffffffff82916f70,ffff800000b99e00) at pfi_ifhead_RB_REMOVE+0x50 sys/net/pf_if.c:80
pfi_detach_ifgroup(ffff800000b68d00) at pfi_detach_ifgroup+0x11b pfi_kif_unref sys/net/pf_if.c:211 [inline]
pfi_detach_ifgroup(ffff800000b68d00) at pfi_detach_ifgroup+0x11b sys/net/pf_if.c:304
if_delgroup(ffff800000b61000,ffff800000b68d00) at if_delgroup+0x193 sys/net/if.c:2679
if_detach(ffff800000b61000) at if_detach+0x1ab sys/net/if.c:1042
tun_clone_destroy(ffff800000b61000) at tun_clone_destroy+0x1e1 sys/net/if_tun.c:325
if_clone_destroy(ffff80002128ebe0) 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(ffff80002128ecb0) at spec_close+0x311 sys/kern/spec_vnops.c:560
VOP_CLOSE(fffffd806ed7a758,7,fffffd807f7b7780,ffff80002123c2a0) at VOP_CLOSE+0xeb sys/kern/vfs_vops.c:177
vn_closefile(fffffd80657d2980,ffff80002123c2a0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd80657d2980,ffff80002123c2a0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614
fdrop(fffffd80657d2980,ffff80002123c2a0) at fdrop+0xc2 sys/kern/kern_descrip.c:1279
closef(fffffd80657d2980,ffff80002123c2a0) at closef+0x11c sys/kern/kern_descrip.c:1263
fdfree(ffff80002123c2a0) at fdfree+0xf4 sys/kern/kern_descrip.c:1195
exit1(ffff80002123c2a0,0,0,1) at exit1+0x335 sys/kern/kern_exit.c:200
sys_exit(ffff80002123c2a0,ffff80002128ef40,ffff80002128ef90) at sys_exit+0x16 sys/kern/kern_exit.c:96
syscall(ffff80002128f010) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002128f010) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffbd680, count: 226
End of stack trace.

dump to dev 4,1 not possible
rpeabnoioct:i ngk.e.rn.
el diagnosticSeaBIOS (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 5539092a-1476-82b6-0a34-88b96a0f4c53
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> 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