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

From Jason Cooper <jason@lakedaemon.net>
Newsgroups linux.kernel
Subject Re: [kernel-hardening] [PATCH v7 0/9] x86/mm: memory area address KASLR
Date 2016-06-22 14:50 +0200
Message-ID <rMPLr-3pV-9@gated-at.bofh.it> (permalink)
References <rMEwF-4Et-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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.

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Thread

[PATCH v7 0/9] x86/mm: memory area address KASLR Kees Cook <keescook@chromium.org> - 2016-06-22 02:50 +0200
  [PATCH v7 4/9] x86/mm: Separate variable for trampoline PGD (x86_64) Kees Cook <keescook@chromium.org> - 2016-06-22 02:50 +0200
  Re: [kernel-hardening] [PATCH v7 0/9] x86/mm: memory area address  KASLR Jason Cooper <jason@lakedaemon.net> - 2016-06-22 14:50 +0200
    Re: [kernel-hardening] [PATCH v7 0/9] x86/mm: memory area address KASLR Thomas Garnier <thgarnie@google.com> - 2016-06-22 18:00 +0200
      Re: [kernel-hardening] [PATCH v7 0/9] x86/mm: memory area address KASLR Kees Cook <keescook@chromium.org> - 2016-06-22 19:10 +0200

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