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Date:	Thu, 17 Jul 2014 06:33:24 -0400
From:	Theodore Ts'o <>
To:	"H. Peter Anvin" <>
Cc:	Andy Lutomirski <>,
	Raghavendra K T <>,
	Paolo Bonzini <>, X86 ML <>,
	Bandan Das <>, Gleb Natapov <>,
	kvm list <>,
	Srivatsa Vaddagiri <>,
	Daniel Borkmann <>,
	"" <>,
	Kees Cook <>
Subject: Re: [PATCH v3 2/5] random,x86: Add arch_get_slow_rng_u64

On Wed, Jul 16, 2014 at 09:55:15PM -0700, H. Peter Anvin wrote:
> On 07/16/2014 05:03 PM, Andy Lutomirski wrote:
> >>
> > I meant that prandom isn't using rdrand for early seeding.
> > 
> We should probably fix that.

It wouldn't hurt to explicitly use arch_get_random_long() in prandom,
but it does use get_random_bytes() in early seed, and for CPU's with
RDRAND present, we do use it in init_std_data() in
drivers/char/random.c, so prandom is already getting initialized via
an RNG (which is effectively a DRBG even if it doesn't pass all of
NIST's rules) which is derived from RDRAND.


					- Ted

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