| From | Andy Lutomirski <> | Date | Tue, 26 Mar 2019 12:20:24 -0700 | Subject | Re: [PATCH V31 25/25] debugfs: Disable open() when kernel is locked down |
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On Tue, Mar 26, 2019 at 11:28 AM Matthew Garrett <matthewgarrett@google.com> wrote: > > From: Matthew Garrett <mjg59@google.com> > > debugfs has not been meaningfully audited in terms of ensuring that > userland cannot trample over the kernel. At Greg's request, disable > access to it entirely when the kernel is locked down. This is done at > open() time rather than init time as the kernel lockdown status may be > made stricter at runtime.
Ugh. Some of those files are very useful. Could this perhaps still allow O_RDONLY if we're in INTEGRITY mode?
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