When I do
sudo smbclient -A /etc/creds/srv-distri -gL 220.127.116.11
where 18.104.22.168 is some random ip with no samba at all, the smbclient process uses 100% cpu until it timesout. It is normal that it times out but it shouldn't use all these cpu cycles.
samba-4.4.5-1.fc24.x86_64 on fedora 24
*** This bug has been marked as a duplicate of bug 12105 ***