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SubjectRe: [PATCH 15/24] asus-wmi: Restrict debugfs interface when the kernel is locked down
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On Tue, 2017-04-18 at 16:30 +0100, David Howells wrote:
> Ben Hutchings <ben@decadent.org.uk> wrote:
>
> > So it's generally not going to be OK to turn off debugfs.  There will
> > probably need to be a distinction between believed-safe and unsafe
> > directories/files.
>
> Any suggestion on how to mark this distinction?

I don't know.

> I'd prefer not to modify every read/write op associated with a
> debugfs file.

I think debugfs should be assumed unsafe by default. So only the
believed-safe parts would need to be changed.

> Modify
> DEFINE_DEBUGFS_ATTRIBUTE() maybe?  And provide lockable variants of
> debugfs_create_u8() and co.?

That could help.

Ben.

--
Ben Hutchings
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