Bug#1023545: systemd --user and sd-pam processes keep running after logout (again)

[Patrick Häcker]

Package: systemd
Version: 252-2
Severity: normal

Dear Maintainer,

similar to #749268 there seems to be again the problem, that when logging
out, the systemd user process and sd-pam are not killed.

Take, e.g., this example:
# loginctl kill-session 34

# pgrep -a -u pat
11499 /lib/systemd/systemd --user
11500 (sd-pam)

# loginctl list-sessions
SESSION UID USER SEAT  TTY
     13   0 root seat0 tty2
     21   0 root seat0 tty2
     25   0 root seat0 tty2
     33   0 root seat0 tty2
     36   0 root seat0 tty2
     37 121 sddm seat0

6 sessions listed.

So although there is no logind session left, there are still the two user
processes around.

I added
KillUserProcesses=yes
but that did not help (is this an additional bug?).

Do I miss anything in order to kill the systemd user process automatically?

Kind regards
Patrick


-- Package-specific info:

-- System Information:
Debian Release: bookworm/sid
  APT prefers stable-security
  APT policy: (900, 'stable-security'), (900, 'testing'), (800, 'stable'), (500, 'unstable-debug'), (400, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 6.0.0-2-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de:en_US
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages systemd depends on:
ii  libacl1            2.3.1-1
ii  libaudit1          1:3.0.7-1.1+b1
ii  libblkid1          2.38.1-1.1+b1
ii  libc6              2.35-4
ii  libcap2            1:2.44-1
ii  libcryptsetup12    2:2.5.0-6
ii  libfdisk1          2.38.1-1.1+b1
ii  libgcrypt20        1.10.1-2
ii  libkmod2           30+20220905-1
ii  liblz4-1           1.9.4-1
ii  liblzma5           5.2.7-0.1
ii  libmount1          2.38.1-1.1+b1
ii  libseccomp2        2.5.4-1+b1
ii  libselinux1        3.4-1+b2
ii  libssl3            3.0.7-1
ii  libsystemd-shared  252-2
ii  libsystemd0        252-2
ii  libzstd1           1.5.2+dfsg-1
ii  mount              2.38.1-1.1+b1

Versions of packages systemd recommends:
ii  dbus [default-dbus-system-bus]   1.14.4-1
ii  systemd-timesyncd [time-daemon]  252-2

Versions of packages systemd suggests:
ii  libfido2-1            1.12.0-1
ii  libtss2-esys-3.0.2-0  3.2.0-1+b1
ii  libtss2-mu0           3.2.0-1+b1
pn  libtss2-rc0           <none>
ii  policykit-1           122-1
pn  systemd-boot          <none>
ii  systemd-container     252-2
pn  systemd-homed         <none>
ii  systemd-resolved      252-2
pn  systemd-userdbd       <none>

Versions of packages systemd is related to:
ii  dbus-user-session  1.14.4-1
pn  dracut             <none>
ii  initramfs-tools    0.142
ii  libnss-systemd     252-2
ii  libpam-systemd     252-2
ii  udev               252-2

-- Configuration Files:
/etc/systemd/journald.conf changed:
[Journal]
SystemMaxUse=300M

/etc/systemd/logind.conf changed:
[Login]
KillUserProcesses=yes

/etc/systemd/system.conf changed:
[Manager]
DefaultTimeoutStartSec=20s
DefaultTimeoutStopSec=15s
DefaultDeviceTimeoutSec=20s


-- no debconf information