[OpenWrt-Devel] Relatively insane getrandom blocking times on ARM/i.MX6 [Was: Re: [PATCH] openssl: Fix longer booting times by unblocking getrandom]

Petr Štetiar ynezz at true.cz
Sat Mar 23 15:16:20 PDT 2019


Few more real world issues.

>From FS#2202:

 brcm63xx HG556a

  [    1.034043] random: fast init done
  [   53.820705] random: crng init done

>From FS#1951:

 brcm63xx Livebox

  [    1.037346] random: fast init done
  [   53.974911] random: crng init done

There's another reported issue with blocking getrandom on mvebu/armada38x
(Turris Omnia) in FS#1979 as well, but it's missing both numbers, just the
time for fast init:

  [    7.125280] random: fast init done
  [    ???     ] random: crng init done (I don't have this number yet)

I think, that in this case the entropy is being exhausted by unbound and thus
preventing crng init forever.

-- ynezz



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