[Bug 2039752] Re: package openssh-server 1:9.0p1-1ubuntu8.5 failed to install/upgrade: installed openssh-server package post-installation script subprocess returned error exit status 1

[Mitchell Dzurick]

Relevant Dpkg errors:

openssh-server (1:9.0p1-1ubuntu8.5) over (1:9.0p1-1ubuntu8)
...
Setting up openssh-server (1:9.0p1-1ubuntu8.5) ...
rescue-ssh.target is a disabled or a static unit not running, not starting it.
Could not execute systemctl:  at /usr/bin/deb-systemd-invoke line 145.
dpkg: error processing package openssh-server (--configure):
 installed openssh-server package post-installation script subprocess returned error exit status 1

So this error was seen when upgrading from the release version of
openssh in Lunar to the current latest version in updates.

I tried to reproduce in an lxc container. Had to downgrade 2 packages like so:
$ lxc launch ubuntu:lunar l
$ lxc shell l
# apt install -y openssh-sftp-server=1:9.0p1-1ubuntu8 -y --allow-downgrades
# apt install -y openssh-client=1:9.0p1-1ubuntu8 -y --allow-downgrades

upon downgrading openssh-server I see this error

Selecting previously unselected package openssh-server.
(Reading database ... 33940 files and directories currently installed.)
Preparing to unpack .../openssh-server_1%3a9.0p1-1ubuntu8_amd64.deb ...
Unpacking openssh-server (1:9.0p1-1ubuntu8) ...
Setting up openssh-server (1:9.0p1-1ubuntu8) ...
rescue-ssh.target is a disabled or a static unit not running, not starting it.
Could not execute systemctl:  at /usr/bin/deb-systemd-invoke line 145.
dpkg: error processing package openssh-server (--configure):
 installed openssh-server package post-installation script subprocess returned error exit stat
us 1
dmesg: read kernel buffer failed: Operation not permitted
                                                         Processing triggers for man-db (2.11.
2-1) ...
Processing triggers for ufw (0.36.1-4.1ubuntu0.1) ...
Errors were encountered while processing:
 openssh-server
needrestart is being skipped since dpkg has failed
E: Sub-process /usr/bin/dpkg returned an error code (1)


Attempting to upgrade to 8.5 I see:

root at l:~# apt-cache policy openssh-server
Setting up openssh-client (1:9.0p1-1ubuntu8.5) ...
Setting up openssh-sftp-server (1:9.0p1-1ubuntu8.5) ...
Setting up openssh-server (1:9.0p1-1ubuntu8.5) ...
rescue-ssh.target is a disabled or a static unit not running, not starting it.
Could not execute systemctl:  at /usr/bin/deb-systemd-invoke line 145.
dpkg: error processing package openssh-server (--configure):
 installed openssh-server package post-installation script subprocess returned error exit stat
us 1
dmesg: read kernel buffer failed: Operation not permitted
                                                         Processing triggers for man-db (2.11.
2-1) ...
Processing triggers for ufw (0.36.1-4.1ubuntu0.1) ...
Errors were encountered while processing:
 openssh-server
needrestart is being skipped since dpkg has failed
E: Sub-process /usr/bin/dpkg returned an error code (1)

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https://bugs.launchpad.net/bugs/2039752

Title:
  package openssh-server 1:9.0p1-1ubuntu8.5 failed to install/upgrade:
  installed openssh-server package post-installation script subprocess
  returned error exit status 1

Status in openssh package in Ubuntu:
  New

Bug description:
  I don't known, but the system report the bug

  ProblemType: Package
  DistroRelease: Ubuntu 23.04
  Package: openssh-server 1:9.0p1-1ubuntu8.5
  ProcVersionSignature: Ubuntu 6.2.0-34.34-generic 6.2.16
  Uname: Linux 6.2.0-34-generic x86_64
  ApportVersion: 2.26.1-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: unknown
  Date: Thu Oct 19 09:27:02 2023
  ErrorMessage: installed openssh-server package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2023-10-18 (0 days ago)
  InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Release amd64 (20230418)
  Python3Details: /usr/bin/python3.11, Python 3.11.4, python3-minimal, 3.11.2-1
  PythonDetails: N/A
  RelatedPackageVersions:
   dpkg 1.21.21ubuntu1
   apt  2.6.0ubuntu0.1
  SourcePackage: openssh
  Title: package openssh-server 1:9.0p1-1ubuntu8.5 failed to install/upgrade: installed openssh-server package post-installation script subprocess returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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