panic: bad dir
Starting stack trace...
panic(ffffffff8286a399) at panic+0x159 sys/kern/subr_prf.c:229
ufs_lookup() at ufs_lookup+0x169a sys/ufs/ufs/ufs_lookup.c:600
VOP_LOOKUP(fffffd806cf1cb50,ffff80002f4037c8,ffff80002f4037f8) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff80002f403798) at vfs_lookup+0x6df sys/kern/vfs_lookup.c:566
namei(ffff80002f403798) at namei+0x56a sys/kern/vfs_lookup.c:250
vn_open(ffff80002f403798,70e,0) at vn_open+0x180 sys/kern/vfs_vnops.c:107
doopenat(ffff80002a6bf9e0,ffffff9c,20000040,70d,0,ffff80002f403940) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126
syscall(ffff80002f4039f0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x265eb960050, count: 248
End of stack trace.
syncing disks...panic: ffs_update: bad link cnt
Starting stack trace...
panic(ffffffff828bd732) at panic+0x159 sys/kern/subr_prf.c:229
ffs_update(fffffd80579d7790,0) at ffs_update+0x2da sys/ufs/ffs/ffs_inode.c:99
VOP_FSYNC(fffffd805107e468,fffffd807f7d7a90,2,ffff80002a6bf9e0) at VOP_FSYNC+0xc9 sys/kern/vfs_vops.c:311
ffs_sync_vnode(fffffd805107e468,ffff80002f403068) at ffs_sync_vnode+0x16b sys/ufs/ffs/ffs_vfsops.c:1081
vfs_mount_foreach_vnode(ffff8000006cf000,ffffffff81b501f0,ffff80002f403068) at vfs_mount_foreach_vnode+0x55 sys/kern/vfs_subr.c:910
ffs_sync(ffff8000006cf000,2,0,fffffd807f7d7a90,ffff80002a6bf9e0) at ffs_sync+0x104 sys/ufs/ffs/ffs_vfsops.c:1131
sys_sync(ffff80002a6bf9e0,0,0) at sys_sync+0xbc sys/kern/vfs_syscalls.c:536
vfs_syncwait(ffff80002a6bf9e0,1) at vfs_syncwait+0x3b
vfs_shutdown(ffff80002a6bf9e0) at vfs_shutdown+0x61 sys/kern/vfs_subr.c:1791
boot(100) at boot+0xe0 sys/arch/amd64/amd64/machdep.c:903
reboot(100) at reboot+0x7b
panic(ffffffff8286a399) at panic+0x179 sys/kern/subr_prf.c:231
ufs_lookup() at ufs_lookup+0x169a sys/ufs/ufs/ufs_lookup.c:600
VOP_LOOKUP(fffffd806cf1cb50,ffff80002f4037c8,ffff80002f4037f8) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff80002f403798) at vfs_lookup+0x6df sys/kern/vfs_lookup.c:566
namei(ffff80002f403798) at namei+0x56a sys/kern/vfs_lookup.c:250
vn_open(ffff80002f403798,70e,0) at vn_open+0x180 sys/kern/vfs_vnops.c:107
doopenat(ffff80002a6bf9e0,ffffff9c,20000040,70d,0,ffff80002f403940) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126
syscall(ffff80002f4039f0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x265eb960050, count: 237
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 016acda6-80d9-6675-f1e2-930bbf0c87d3
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