On Tue, Mar 26, 2019 at 11:28 AM Matthew Garrett <matthewgarrett@xxxxxxxxxx> wrote: > > From: Matthew Garrett <mjg59@xxxxxxxxxx> > > 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?
