[GIT PULL] Security subsystem: integrity updates for v4.15

[Mimi Zohar]

On Mon, 2017-11-13 at 09:05 +1100, James Morris wrote:
> Hi Linus,
> 
> Please pull these fixes for the Integrity subsystem.
> 
> (From Mimi)
> 
> "There is a mixture of bug fixes, code cleanup, preparatory code for new 
> functionality and new functionality.
> 
> Commit 26ddabfe96bb "evm: enable EVM when X509 certificate is loaded" 
> enabled EVM without loading a symmetric key, but was limited to defining 
> the x509 certificate pathname at build.  Included in this set of patches 
> is the ability of enabling EVM, without loading the EVM symmetric key, 
> from userspace.  New is the ability to prevent the loading of an EVM 
> symmetric key."

James, thank you for keeping the integrity patches separate, as
requested, and sending the extra pull request.  This is extra work for
you, but I really appreciate it.  The pull request seems to have gone
smoothly.

So much of the integrity subsystem is dependent on the other security
subsystems (eg. keys, TPM, LSM hooks).  Having a common security
testing branch is really helpful.  It makes collaboration that much
easier.

Thanks!

Mimi

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