panic: bad dir
Starting stack trace...
panic(ffffffff827b00ba) at panic+0x159 sys/kern/subr_prf.c:229
ufs_lookup() at ufs_lookup+0x1749 ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline]
ufs_lookup() at ufs_lookup+0x1749 sys/ufs/ufs/ufs_lookup.c:444
VOP_LOOKUP(fffffd80074552d0,ffff80002d98bc38,ffff80002d98bc68) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff80002d98bc08) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566
namei(ffff80002d98bc08) at namei+0x55a sys/kern/vfs_lookup.c:250
vn_open(ffff80002d98bc08,1,0) at vn_open+0xf8 sys/kern/vfs_vnops.c:140
doopenat(ffff80002a6e6810,ffffff9c,20000080,0,0,ffff80002d98bde0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff80002d98be50) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd88620cddf0, count: 248
End of stack trace.
syncing disks...28 20 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2  giving up

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 d662f6a5-d763-0b53-7cd8-e4e6b0001699
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 0x000f28a0: 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> 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