[Bug 1915936] Re: systemd-coredump user is created by something other than its derived systemd packages

[Dan Streetman]

@slashd, this seems to be an issue that should be solved in Debian and
then pulled into the development release for Ubuntu, but it doesn't seem
like something that needs to be SRUed, right? I'm going to mark the SRU
releases wontfix, but if that's incorrect please do feel free to open it
back up for sru

** Changed in: systemd (Ubuntu Bionic)
       Status: New => Won't Fix

** Changed in: systemd (Ubuntu Focal)
       Status: New => Won't Fix

** Changed in: systemd (Ubuntu Groovy)
       Status: New => Won't Fix

** Also affects: systemd (Ubuntu Impish)
   Importance: Wishlist
       Status: New

** Changed in: systemd (Ubuntu Hirsute)
       Status: New => Won't Fix

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1915936

Title:
  systemd-coredump user is created by something other than its derived
  systemd packages

Status in systemd package in Ubuntu:
  New
Status in systemd source package in Bionic:
  Won't Fix
Status in systemd source package in Focal:
  Won't Fix
Status in systemd source package in Groovy:
  Won't Fix
Status in systemd source package in Hirsute:
  Won't Fix
Status in systemd source package in Impish:
  New
Status in systemd package in Debian:
  New

Bug description:
  systemd-coredump binary package is instructed as follows:

  #debian/systemd-coredump.postinst:
  adduser --quiet --system --group --no-create-home --home /run/systemd \
  --gecos "systemd Core Dumper" systemd-coredump

  But one doesn't need this package to be installed to have the systemd-
  coredump user created. This was taken from a focal 20.04.2 fresh
  installation (Right after a vanilla installation):

  # cat /etc/passwd:
  ...
  systemd-coredump:x:999:999:systemd Core Dumper:/:/usr/sbin/nologin
  ...

  # dpkg -l | grep -i systemd
  ii  dbus-user-session                    1.12.16-2ubuntu2.1                amd64        simple interprocess messaging system (systemd --user integration)
  ii  libnss-systemd:amd64                 245.4-4ubuntu3.4                  amd64        nss module providing dynamic user and group name resolution
  ii  libpam-systemd:amd64                 245.4-4ubuntu3.4                  amd64        system and service manager - PAM module
  ii  libsystemd0:amd64                    245.4-4ubuntu3.4                  amd64        systemd utility library
  ii  networkd-dispatcher                  2.0.1-1                           all          Dispatcher service for systemd-networkd connection status changes
  ii  python3-systemd                      234-3build2                       amd64        Python 3 bindings for systemd
  ii  systemd                              245.4-4ubuntu3.4                  amd64        system and service manager
  ii  systemd-sysv                         245.4-4ubuntu3.4                  amd64        system and service manager - SysV links
  ii  systemd-timesyncd                    245.4-4ubuntu3.4                  amd64        minimalistic service to synchronize local time with NTP servers

  # /var/log/syslog
  syslog:Feb 17 15:31:56 test systemd-sysusers[402]: Creating group systemd-coredump with gid 999.
  syslog:Feb 17 15:31:56 test systemd-sysusers[402]: Creating user systemd-coredump (systemd Core Dumper) with uid 999 and gid 999.

  
  Additionnally, you may notice the home directory during the user creation at installation sets it to "/" as opposed to "/run/systemd" directive in the appropriate postint. It is contradictory.

  * Why systemd-coredump user is created at installation time and/or without 'systemd-coredump' package installed ?
  * Why this early creation set the home directory to "/" ?

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1915936/+subscriptions