syncing disks...panic: ffs_update: bad link cnt
Starting stack trace...
panic(ffffffff828df699) at panic+0x16f sys/kern/subr_prf.c:229
ffs_update(fffffd806e179dd0,0) at ffs_update+0x2da sys/ufs/ffs/ffs_inode.c:99
VOP_FSYNC(fffffd80678c4368,fffffd807f7d7820,2,ffff80002bcb72c0) at VOP_F
SYNC+0xcf
ffs_sync_vnode(fffffd80678c4368,ffff80002bca3a18) at ffs_sync_vnode+0x16b sys/ufs/ffs/ffs_vfsops.c:1081
vfs_mount_foreach_vnode(ffff8000006d2400,ffffffff8143cda0,ffff80002bca3a18) at vfs_mount_foreach_vnode+0x55 sys/kern/vfs_subr.c:910
ffs_sync(ffff8000006d2400,2,0,fffffd807f7d7820,ffff80002bcb72c0) at ffs_sync+0x104 sys/ufs/ffs/ffs_vfsops.c:1131
sys_sync(ffff80002bcb72c0,0,0) at sys_sync+0xbc sys/kern/vfs_syscalls.c:536
vfs_syncwait(ffff80002bcb72c0,1) at vfs_syncwait+0x3b
vfs_shutdown(ffff80002bcb72c0) at vfs_shutdown+0x61 sys/kern/vfs_subr.c:1791
boot(100) at boot+0xe6 sys/arch/amd64/amd64/machdep.c:903
reboot(100) at reboot+0x81
panic(ffffffff8288d520) at panic+0x18f sys/kern/subr_prf.c:231
vop_generic_badop(ffff80002bca3ce8) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133
VOP_STRATEGY(fffffd806e177bd0,fffffd8077ed5380) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628
bwrite(fffffd8077ed5380) at bwrite+0x1d0 sys/kern/vfs_bio.c:757
VOP_BWRITE(fffffd8077ed5380) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640
ufs_mkdir(ffff80002bca3f60) at ufs_mkdir+0x445 sys/ufs/ufs/ufs_vnops.c:1165
VOP_MKDIR(fffffd8066df4128,ffff80002bca40c0,ffff80002bca40f0,ffff80002bca3ff0) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388
domkdirat(ffff80002bcb72c0,ffffff9c,790ea47eb920,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3077
syscall(ffff80002bca4270) at syscall+0x53b mi_syscall sys/sys/syscall_mi.h:183 [inline]
syscall(ffff80002bca4270) at syscall+0x53b sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x790ea47eb990, count: 236
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 0d5ef51b-0062-dd1a-a10b-15f17b148763
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 0x000f27f0: 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 3.65
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