Comment 27 for bug 1572132

> The funny thing is you can enter or list the "hidden" folder if your force the path.

The bug has been confirmed and there are explanations and patches but the maintainers don't seem ready to apply it which is unfortunate as it is a very nefarious bug (Windows 10 doesn't support SMB1.0 by default). If you aren't aware of this bug you could mistakenly think all files of a share are being backed up when they aren't.

https://bugzilla.samba.org/show_bug.cgi?id=13107

https://www.spinics.net/lists/linux-cifs/msg14170.html

Explanation of bug:
https://www.spinics.net/lists/linux-cifs/msg14405.html

Unfortunately I'm not sure how to apply the patches and recompile just the cifs module.