> I suspect we can allow MNT_FORCE for non-privileged users
> as well if we can trust the filesystem.
I don't think so. MNT_FORCE has side effects on the superblock. So a
user shouldn't be able to force an unmount on a bind mount s/he did,
but there's no problem with allowing plain/lazy unmounts.
We could possibly allow MNT_FORCE, for FS_SAFE filesystems.
Miklos
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