Re: [kernel-hardening] [PATCH v7 0/9] x86/mm: memory area address KASLR

[Jason Cooper]

Hey Kees,

On Tue, Jun 21, 2016 at 05:46:57PM -0700, Kees Cook wrote:
> Notable problems that needed solving:
...
>  - Reasonable entropy is needed early at boot before get_random_bytes()
>    is available.

This series is targetting x86, which typically has RDRAND/RDSEED
instructions.  Are you referring to other arches?  Older x86?  Also,
isn't this the same requirement for base address KASLR?

Don't get me wrong, I want more diverse entropy sources available
earlier in the boot process as well. :-)  I'm just wondering what's
different about this series vs base address KASLR wrt early entropy
sources.

thx,

Jason.