How to make non-root usr able to use mount “-o” options?

It’s on my debian 9.4 system, linux 4.9 which I have full access to it(including root access and hardware access).

I created an user and wanted to mount a overlay2 filesystem in its home dir. However, it was denied because only root can use mount “-o” option.

I don’t want to use sudo to do this, because in that way this usr will be allowed to mount any filesystem.

I don’t want to use sudo to do this, because in that way this usr will be allowed to mount any filesystem.

sudo is the correct tool for the job. You can specify options for a command in your sudoers file; this will only allow the command to be run with the exact options specified.