Groups > linux.debian.bugs.dist > #963694

Bug#931644: Buster kernel entropy pool too low on VM boot

From	"Michael J. Redd" <micredd@gmail.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#931644: Buster kernel entropy pool too low on VM boot
Date	2019-07-08 19:10 +0200
Message-ID	<yhFjj-Qe-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Package: linux-image-4.19.0-5-amd64
Version: 4.19.0-5

Issue:
======

After upgrading to Debian Buster, Xen PV guests' entropy pool is too
low to start cryptographic services in a timely manner. This results in
30+ second delays in the startup of services such as SSH. If I connect
to the VM's virtual VNC console and move the mouse during boot, the
system very rapidly collects entropy and crypto-dependent services like
SSH start with no delay.

The symptoms are identical to a bug I reported for Debian 9 (bug
#897917).

Workaround:
===========

Install `haveged`. If another RNG feeds the entropy pool, the VM and
its services boot as expected.

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Bug#931644: Buster kernel entropy pool too low on VM boot "Michael J. Redd" <micredd@gmail.com> - 2019-07-08 19:10 +0200
  Bug#931644: Buster kernel entropy pool too low on VM boot Andy Smith <andy@strugglers.net> - 2019-07-08 20:10 +0200
    Bug#931644: Buster kernel entropy pool too low on VM boot "Michael J. Redd" <micredd@gmail.com> - 2019-07-11 15:50 +0200

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