[Bug 2055388] [NEW] suspected memory leak with indicator-keyboard (causing gnome-session-flashback to freeze after startup)

[prusswan]

Public bug reported:

Description:

The system was previously on 22.04, then upgraded to 23.10 to the
current daily 24.04. System will freeze up a few minutes after startup
(with no apparent related crashes). After various trial and error, the
possible cause is isolated to indicator-keyboard when running gnome-
session-flashback (freeze does not happen anymore with flashback
interface, after indicator-keyboard package is removed). Not sure why
this is not happening with vanilla gdm3. Also, the freeze was first
observed after the upgrade to 23.10.

**logs below taken from `sudo journalctl --since "3 hours ago" | grep
indicator`**

Feb 29 16:49:03 machine kernel: oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=user.slice,mems_allowed=0,global_oom,task_memcg=/user.slice/user-1000.slice/user at 1000.service/app.slice/indicator-keyboard.service,task=indicator-keybo,pid=5810,uid=1000
Feb 29 16:49:03 machine kernel: Out of memory: Killed process 5810 (indicator-keybo) total-vm:66620172kB, anon-rss:64296784kB, file-rss:768kB, shmem-rss:0kB, UID:1000 pgtables:129412kB oom_score_adj:200
Feb 29 16:49:03 machine kernel: oom_reaper: reaped process 5810 (indicator-keybo), now anon-rss:688kB, file-rss:768kB, shmem-rss:0kB
Feb 29 16:48:56 machine systemd[5304]: indicator-keyboard.service: A process of this unit has been killed by the OOM killer.
Feb 29 16:48:57 machine systemd[5304]: indicator-keyboard.service: Main process exited, code=killed, status=9/KILL
Feb 29 16:48:57 machine systemd[5304]: indicator-keyboard.service: Failed with result 'oom-kill'.
Feb 29 16:48:57 machine systemd[5304]: indicator-keyboard.service: Consumed 1min 11.913s CPU time.
Feb 29 16:48:58 machine systemd[5304]: indicator-keyboard.service: Scheduled restart job, restart counter is at 1.
Feb 29 16:48:58 machine systemd[5304]: Started indicator-keyboard.service - Indicator Keyboard Backend.
Feb 29 17:00:40 machine dbus-daemon[1111]: [system] Activating via systemd: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service' requested by ':1.9' (uid=0 pid=1588 comm="apt remove indicator-keyboard" label="unconfined")

** Affects: indicator-keyboard (Ubuntu)
     Importance: Undecided
         Status: New

** Summary changed:

- suspected memory leak with indicator-keyboard
+ suspected memory leak with indicator-keyboard (causing gnome-session-flashback to freeze after startup)

** Description changed:

  Description:
  
  The system was previously on 22.04, then upgraded to 23.10 to the
  current daily 24.04. System will freeze up a few minutes after startup
  (with no apparent related crashes). After various trial and error, the
  possible cause is isolated to indicator-keyboard when running gnome-
  session-flashback (freeze does not happen anymore with flashback
  interface, after indicator-keyboard package is removed). Not sure why
  this is not happening with vanilla gdm3. Also, the freeze was first
  observed after the upgrade to 23.10.
  
- 
- **below from `sudo journalctl --since "3 hours ago" | grep indicator`**
- 
+ **logs below taken from `sudo journalctl --since "3 hours ago" | grep
+ indicator`**
  
  Feb 29 16:49:03 machine kernel: oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=user.slice,mems_allowed=0,global_oom,task_memcg=/user.slice/user-1000.slice/user at 1000.service/app.slice/indicator-keyboard.service,task=indicator-keybo,pid=5810,uid=1000
  Feb 29 16:49:03 machine kernel: Out of memory: Killed process 5810 (indicator-keybo) total-vm:66620172kB, anon-rss:64296784kB, file-rss:768kB, shmem-rss:0kB, UID:1000 pgtables:129412kB oom_score_adj:200
  Feb 29 16:49:03 machine kernel: oom_reaper: reaped process 5810 (indicator-keybo), now anon-rss:688kB, file-rss:768kB, shmem-rss:0kB
  Feb 29 16:48:56 machine systemd[5304]: indicator-keyboard.service: A process of this unit has been killed by the OOM killer.
  Feb 29 16:48:57 machine systemd[5304]: indicator-keyboard.service: Main process exited, code=killed, status=9/KILL
  Feb 29 16:48:57 machine systemd[5304]: indicator-keyboard.service: Failed with result 'oom-kill'.
  Feb 29 16:48:57 machine systemd[5304]: indicator-keyboard.service: Consumed 1min 11.913s CPU time.
  Feb 29 16:48:58 machine systemd[5304]: indicator-keyboard.service: Scheduled restart job, restart counter is at 1.
  Feb 29 16:48:58 machine systemd[5304]: Started indicator-keyboard.service - Indicator Keyboard Backend.
  Feb 29 17:00:40 machine dbus-daemon[1111]: [system] Activating via systemd: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service' requested by ':1.9' (uid=0 pid=1588 comm="apt remove indicator-keyboard" label="unconfined")

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https://bugs.launchpad.net/bugs/2055388

Title:
  suspected memory leak with indicator-keyboard (causing gnome-session-
  flashback to freeze after startup)

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