panic: vref used where vget required
Starting stack trace...
panic(ffffffff828aa485) at panic+0x159 sys/kern/subr_prf.c:229
vref(fffffd807e0098c8) at vref+0x83 sys/kern/vfs_subr.c:698
namei(ffff800035be7ad8) at namei+0x3b2 sys/kern/vfs_lookup.c:221
dofchownat(ffff80002a6b22b8,ffffff9c,20000040,0,ffffffff,0) at dofchownat+0xb3 sys/kern/vfs_syscalls.c:2440
syscall(ffff800035be7d80) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x20671d74240, count: 251
End of stack trace.