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Groups > linux.debian.devel.release > #79911

Re: Fixing Linux getrandom() in stable

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On Sun, 2018-05-13 at 11:27 +0200, Yves-Alexis Perez wrote:
> On Wed, 2018-05-09 at 23:46 +0100, Ben Hutchings wrote:
> > It is unlikely that any further fix will be forthcoming on the kernel
> > side, so I believe that we need to do one of:
> > 
> > 1. Add entropy to the kernel during boot; either:
> >    a. Improve systemd-random-seed
> >    b. Recommend use of haveged
> 
> There's also something which might be worth trying in coordination with
> upstream: credit entropy for platform RNG like RDRAND/RDSEED. It obviously
> won't fix the problem everywhere, but at least on “recent” Intel platforms
> there should be an entropy source available without any further initialization
> (unlike the TPM for example).
> 
> I know about the trust issues wrt. Intel, but maybe that should be revisited?

I think it would make sense to at least provide a run-time option for
trusting the platform RNG.

Ben.

-- 
Ben Hutchings
The most exhausting thing in life is being insincere.
                                                 - Anne Morrow Lindberg

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Thread

Fixing Linux getrandom() in stable Ben Hutchings <ben@decadent.org.uk> - 2018-05-10 00:50 +0200
  Re: Fixing Linux getrandom() in stable Michael Biebl <biebl@debian.org> - 2018-05-10 15:50 +0200
    Re: Fixing Linux getrandom() in stable Russ Allbery <rra@debian.org> - 2018-05-10 19:30 +0200
      Re: Fixing Linux getrandom() in stable Michael Biebl <biebl@debian.org> - 2018-05-10 19:40 +0200
        Re: Fixing Linux getrandom() in stable Russ Allbery <rra@debian.org> - 2018-05-10 19:50 +0200
          Re: Fixing Linux getrandom() in stable Ian Campbell <ijc@debian.org> - 2018-05-10 21:20 +0200
        Re: Fixing Linux getrandom() in stable Benjamin Kaduk <kaduk@mit.edu> - 2018-05-10 19:50 +0200
  Re: Fixing Linux getrandom() in stable Yves-Alexis Perez <corsac@debian.org> - 2018-05-13 11:30 +0200
    Re: Fixing Linux getrandom() in stable Ben Hutchings <ben@decadent.org.uk> - 2018-05-13 19:20 +0200
  Re: Fixing Linux getrandom() in stable Adrian Bunk <bunk@debian.org> - 2018-05-13 22:50 +0200
    Re: Fixing Linux getrandom() in stable Thorsten Glaser <tg@mirbsd.de> - 2018-05-13 23:40 +0200
      Re: Fixing Linux getrandom() in stable Thorsten Glaser <tg@mirbsd.de> - 2018-05-14 03:00 +0200
      Re: Fixing Linux getrandom() in stable "Theodore Y. Ts'o" <tytso@mit.edu> - 2018-05-14 03:20 +0200
      Re: Fixing Linux getrandom() in stable Sam Hartman <hartmans@debian.org> - 2018-05-14 15:20 +0200
    Re: Fixing Linux getrandom() in stable Ben Hutchings <ben@decadent.org.uk> - 2018-05-14 04:20 +0200
      Re: Fixing Linux getrandom() in stable Adrian Bunk <bunk@debian.org> - 2018-05-22 21:50 +0200

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