[GIT PULL] security: general updates for v4.21

[Linus Torvalds]

On Fri, Dec 28, 2018 at 7:11 PM James Morris <jmorris at namei.org> wrote:
>
> I do this every development cycle, after requests from security subsystem
> maintainers to sync to -rc kernels.

Why?

A merge should have a *reason*.

                Linus