panic: bad dir
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
* 30990  34396      0         0x2          0    0  ifconfig
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:212
ufs_dirbadentry(ffff8000149ffb08,ffff8000149ffb08,6f83a76d28835d7e) at ufs_dirbadentry
VOP_LOOKUP(fffffd803efda320,ffff8000149ffbb0,ffff8000149ffb70) at VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
unveil_find_cover(fffffd803efda320,ffff8000ffff24c8) at unveil_find_cover+0x139 sys/kern/kern_unveil.c:290
unveil_add_vnode(ffff8000ffff7078,fffffd803efda320,0) at unveil_add_vnode+0x23c sys/kern/kern_unveil.c:471
unveil_add(ffff8000ffff24c8,ffff800014a00178,ffff800014a00243) at unveil_add+0x273 sys/kern/kern_unveil.c:597
sys_unveil(ffff8000ffff24c8,ffff800014a002b0,ffff800014a00320) at sys_unveil+0x405 sys/kern/vfs_syscalls.c:937
syscall(ffff800014a00390) at syscall+0x511
Xsyscall(6,72,1,72,7f7ffffc6528,10e72808ac8) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc64b0, count: 5
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.