Re: [kernel-hardening] Re: [PATCH v4 13/13] random: warn when kernel uses unseeded randomness

From	"Jason A. Donenfeld" <Jason@zx2c4.com>
Newsgroups	linux.kernel
Subject	Re: [kernel-hardening] Re: [PATCH v4 13/13] random: warn when kernel uses unseeded randomness
Date	2017-06-18 21:20 +0200
Message-ID	<tTNTP-Kq-1@gated-at.bofh.it> (permalink)
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On Sun, Jun 18, 2017 at 5:46 PM, Theodore Ts'o <tytso@mit.edu> wrote:
> You are effectively proposing that there ought to be a middle range of
> security between prandom_32, get_random_u32/get_random_u64 and
> get_random_bytes().  I think that's going to lead to all sorts of
> complexity and bugs from people not understanding when they should use
> get_random_u32 vs get_random_bytes versus prandom_u32.  And then we'll
> end up needing to audit all of the callsites for get_random_u32() so
> they don't violate this new usage rule that you are proposing.

I agree with you wholeheartedly.

get_random_* provides the secure random numbers.
prandom_* provides the insecure random numbers.

Introducing some kind of middle ground will result in needless
complexity and inevitable bugs.

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Re: [PATCH v4 13/13] random: warn when kernel uses unseeded  randomness Theodore Ts'o <tytso@mit.edu> - 2017-06-08 10:20 +0200
  Re: [PATCH v4 13/13] random: warn when kernel uses unseeded randomness "Jason A. Donenfeld" <Jason@zx2c4.com> - 2017-06-08 14:10 +0200
  Re: [kernel-hardening] Re: [PATCH v4 13/13] random: warn when kernel uses unseeded randomness Michael Ellerman <mpe@ellerman.id.au> - 2017-06-15 13:10 +0200
    Re: [kernel-hardening] Re: [PATCH v4 13/13] random: warn when kernel uses unseeded randomness Stephan Müller <smueller@chronox.de> - 2017-06-15 14:00 +0200
      Re: [kernel-hardening] Re: [PATCH v4 13/13] random: warn when kernel  uses unseeded randomness Theodore Ts'o <tytso@mit.edu> - 2017-06-18 17:50 +0200
        Re: [kernel-hardening] Re: [PATCH v4 13/13] random: warn when kernel uses unseeded randomness Stephan Müller <smueller@chronox.de> - 2017-06-18 20:00 +0200
          Re: [kernel-hardening] Re: [PATCH v4 13/13] random: warn when kernel  uses unseeded randomness "Jason A. Donenfeld" <Jason@zx2c4.com> - 2017-06-18 21:20 +0200
        Re: [kernel-hardening] Re: [PATCH v4 13/13] random: warn when kernel  uses unseeded randomness "Jason A. Donenfeld" <Jason@zx2c4.com> - 2017-06-18 21:20 +0200

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