Comment 2 for bug 60722

I had the same problem and here's what fixed it for me:

fstab options before: "quiet,utf8,umask=006,uid=1000,gid=1000"
would result in "u=rwx,g=x,o=x".

fstab options now: "quiet,utf8,umask=177,dmask=077,uid=1000,gid=1000"
results in "u=rw,g=,o=" for files and "u=rwx,g=,o=" for directories.