Bug#978955: last update disables socket activation

Hi Colin,

On Fri, Jan 01, 2021 at 11:21:31AM +0000, Colin Watson wrote:
> On Fri, Jan 01, 2021 at 06:59:42AM +0100, Marc Haber wrote:
> > with this last update of the Debian package,
> > unstable systems that are using socket activated
> > ssh lose ssh access (connection refused).
> > 
> > It ie nscessary to do systemctl stop ssh.service,
> > systemctl start ssh.socket to be able to log in again.
> 
> What exactly was the previous version that worked?  1:8.4p1-3 didn't go
> anywhere near any of the machinery for socket activation (it only
> involved a small fix to the ssh-copy-id shell script), so it's hard to
> see what could possibly have gone wrong there.
> 
> Is it possible you upgraded some other piece of systemd-related
> machinery at around the same time?

ok, this is interesting. While this has rendered _all_ my unstable
installations inaccessible via ssh, I have taken a closer look on the
most simple machine, and have found out openssh didn't get upgraded
during the apt session in question. Last ssh upgrade was on December 05
when 1:8.4p1-3 replaced 1:8.4p1-2.

However there was a systemd upgrade from 247.2-2 to 247.2-3.

I have saved the dpkg log in question. If there is anything more I can
do to help, please let me know.

Greetings
Marc