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Message-ID: <20140717103324.GJ1491@thunk.org> Date: Thu, 17 Jul 2014 06:33:24 -0400 From: Theodore Ts'o <tytso@....edu> To: "H. Peter Anvin" <hpa@...or.com> Cc: Andy Lutomirski <luto@...capital.net>, Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>, Paolo Bonzini <pbonzini@...hat.com>, X86 ML <x86@...nel.org>, Bandan Das <bsd@...hat.com>, Gleb Natapov <gleb@...nel.org>, kvm list <kvm@...r.kernel.org>, Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>, Daniel Borkmann <dborkman@...hat.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Kees Cook <keescook@...omium.org> 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. Cheers, - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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