'Livepatch-Notif' is always a zombie process after a system restart

Bug #1809505 reported by chris pollock on 2018-12-21
This bug affects 4 people
Affects Status Importance Assigned to Milestone
update-notifier (Ubuntu)
Andrea Azzarone

Bug Description

* Impact
update-notifier let livepatch-notification zombie processes

* Test case
wait for a livepatch update/notification, after the notification is dismissed there should be no zombie process

* Regression potential
Check that the livepatch notifications are correctly displayed still


This is Ubuntu 18.04.1 with update-notifier version
apt-cache policy update-notifier

As shown here - https://imageshack.com/i/pl753Ekfp AFAICT I don't have
livepatch enabled. Running:

chris@localhost:/var/log$ ps axo stat,ppid,pid,comm | grep -w defunct
Z+ 3283 3290 livepatch-notif <defunct>

3283 chris 20 0 585404 23776 17608 S 0.0 0.2 0:00.09

3290 chris 20 0 0 0 0 Z 0.0 0.0 0:00.00

It's no big deal to remove the zombie by killing update-notifier
however I don't know if that's the right thing to do or not and why is
livepatch-notif always a zombie process after a restart?

Related branches

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tags: added: bot-comment
chris pollock (cpollock) wrote :

Forgot to add source package when converting from question to bug.

affects: ubuntu → update-notifier (Ubuntu)
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in update-notifier (Ubuntu):
status: New → Confirmed
Steve Langasek (vorlon) on 2018-12-24
Changed in update-notifier (Ubuntu):
assignee: nobody → Andrea Azzarone (azzar1)
chris pollock (cpollock) wrote :

Question, since I have to kill the update-notifier process to get rid of the Zombie Livepatch-Notif process does this mean that updates are not being automatically checked for and that I need to run 'apt update' manually periodically?

Andrea Azzarone (azzar1) on 2019-01-07
Changed in update-notifier (Ubuntu):
status: Confirmed → In Progress
Andrea Azzarone (azzar1) on 2019-01-07
Changed in update-notifier (Ubuntu):
importance: Undecided → Medium
Sebastien Bacher (seb128) wrote :

> does this mean that updates are not being automatically checked for and that I need to run 'apt update' manually periodically?

No, it doesn't impact the work update-notifier is doing

Changed in update-notifier (Ubuntu):
status: In Progress → Fix Committed
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package update-notifier - 3.192.11

update-notifier (3.192.11) disco; urgency=medium

  * src/update-notifier.c: Don't use G_SPAWN_DO_NOT_REAP_CHILD in order
    to avoid zombie processes. (LP: #1809505)

 -- Andrea Azzarone <email address hidden> Mon, 07 Jan 2019 12:49:07 +0000

Changed in update-notifier (Ubuntu):
status: Fix Committed → Fix Released
Sebastien Bacher (seb128) wrote :

I've uploaded a SRU to bionic for the fix, cosmic doesn't have livepatch so the SRU is not useful there

description: updated
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