GNU bug report logs - #36380
service urandom-seed takes too long on boot

Previous Next

Full log

Message #37 received at 36380 <at> debbugs.gnu.org (full text, mbox):

From: Leo Famulari <leo <at> famulari.name>
To: Robert Vollmert <rob <at> vllmrt.net>
Cc: 36380 <at> debbugs.gnu.org, Ludovic Courtès <ludo <at> gnu.org>
Subject: Re: bug#36380: service urandom-seed takes too long on boot
Date: Fri, 28 Jun 2019 13:24:01 -0400

[Message part 1 (text/plain, inline)]

On Fri, Jun 28, 2019 at 08:47:35AM +0200, Robert Vollmert wrote:
> > On 27. Jun 2019, at 21:03, Leo Famulari <leo <at> famulari.name> wrote:
> > Perhaps, but if the reason for the slowness on their first boot was a
> > suboptimal /dev/hwrng source, I would expect it to be equally slow for
> > each boot, since we unconditionally read 64 bytes each time.
> 
> It’s 512 bytes, not that that should fundamentally change anything.

Oh right, my bad. It's been a while...

Anyways, this should either work immediately or fail. Aside from
getrandom(2), which we aren't using here, nothing related to this stuff
should ever block, and if it does then it's a bug we need to work
around.

So, I suggest we add a 1 second timeout to this read.

I can work on that next week.

[signature.asc (application/pgp-signature, inline)]

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.