[GIT PULL] Kernel lockdown for secure boot

[Matthew Garrett]

On Tue, Apr 3, 2018 at 4:39 PM Linus Torvalds
<torvalds at linux-foundation.org>
wrote:

> On Tue, Apr 3, 2018 at 4:26 PM, Linus Torvalds
> <torvalds at linux-foundation.org> wrote:
> >
> > Magically changing kernel behavior depending on some subtle and often
> > unintentional bootup behavior detail is completely idiotic.

> Another way of looking at this: if lockdown is a good idea to enable
> when you booted using secure boot, then why isn't it a good idea when
> you *didn't* boot using secure boot?

Because it's then trivial to circumvent and the restrictions aren't worth
the benefit.
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