apport's cloud-init-specific handling tracebacks on minimal cloud images

Bug #1861451 reported by Dan Watkins on 2020-01-30
This bug affects 1 person
Affects Status Importance Assigned to Milestone
apport (Ubuntu)
Brian Murray

Bug Description

It is not possible to run ubuntu-bug for some packages which gather information as root because pkexec does not work in non-graphical environments (LP: #1821415). This was worked around in Ubuntu 19.10 by not gathering any information that would require root access.

Test Case

1) Install multipass.
2) `multipass launch -n reproducer`
3) `multipass shell reproducer`
4) `ubuntu-bug cloud-init`

Expected behaviour:

Usual bug reporting flow (though, currently, I would really expect to see just the issue reported in bug 1861450).

Actual behaviour:

ERROR: hook /usr/share/apport/package-hooks/ crashed:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport/", line 198, in _run_hook
    symb['add_info'](report, ui)
  File "/usr/share/apport/package-hooks/", line 6, in add_info
    return cloudinit_add_info(report, ui)
  File "/usr/lib/python3/dist-packages/cloudinit/", line 123, in add_info
    attach_cloud_init_logs(report, ui)
  File "/usr/lib/python3/dist-packages/cloudinit/", line 57, in attach_cloud_init_logs
    'cloud-init-output.log.txt': 'cat /var/log/cloud-init-output.log'})
  File "/usr/lib/python3/dist-packages/apport/", line 444, in attach_root_command_outputs
    sp = subprocess.Popen(_root_command_prefix() + [wrapper_path, script_path])
  File "/usr/lib/python3.6/", line 729, in __init__
    restore_signals, start_new_session)
  File "/usr/lib/python3.6/", line 1364, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'pkexec': 'pkexec'

(As alluded to above, this also demonstrates bug 1861450 after the traceback is emitted.)

Regression Potential
Little as we are just returning and empty list if pkexec is not available, however it is always possible that the code is misformated or that there is a logic error in it. A regression test would be to run the ubuntu-bug cloud-init on a system with pkexec installed.

tags: added: rls-ff-incoming
tags: added: focal
removed: rls-ff-incoming
tags: added: id-5e3c4d71dc61a969457f7c09
Brian Murray (brian-murray) wrote :

This actually only affects Ubuntu 18.04.

Changed in apport (Ubuntu Focal):
status: New → Invalid
Changed in apport (Ubuntu):
status: New → Fix Released
Changed in apport (Ubuntu Bionic):
status: New → In Progress
assignee: nobody → Brian Murray (brian-murray)
description: updated
description: updated

Hello Dan, or anyone else affected,

Accepted apport into bionic-proposed. The package will build now and be available at in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Changed in apport (Ubuntu Bionic):
status: In Progress → Fix Committed
tags: added: verification-needed verification-needed-bionic

All autopkgtests for the newly accepted apport (2.20.9-0ubuntu7.17) for bionic have finished running.
The following regressions have been reported in tests triggered by the package:

apport/2.20.9-0ubuntu7.17 (amd64, i386)
ubuntu-release-upgrader/1:18.04.38 (armhf)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].


Thank you!

Brian Murray (brian-murray) wrote :

I tested this in an Ubuntu 18.04 lxc container and removed the policykit-1 package. With the version of apport in -updates I received the Traceback which appears in the bug description. After that I installed the version of apport from -proposed and I did not receive a Traceback.

ubuntu@darling-horse:~$ apt-cache policy apport
  Installed: 2.20.9-0ubuntu7.17
  Candidate: 2.20.9-0ubuntu7.17
  Version table:
 *** 2.20.9-0ubuntu7.17 500
        500 bionic-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     2.20.9-0ubuntu7.16 500
        500 bionic-updates/main amd64 Packages
        500 bionic-security/main amd64 Packages
     2.20.9-0ubuntu7 500
        500 bionic/main amd64 Packages

tags: added: verification-done verification-done-bionic
removed: verification-needed verification-needed-bionic
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package apport - 2.20.9-0ubuntu7.17

apport (2.20.9-0ubuntu7.17) bionic; urgency=medium

  [ Brian Murray ]
  * apport/ workaround the fact that pkexec does not work in
    non-graphical environments yet (LP #1821415) by skipping the gathering of
    information as root because it isn't strictly necessary for a bug report.
    (LP: #1861451)

  [ Matthieu Clemenceau ]
  * Add in a source package hook symlink for linux-firmware. (LP: #1872059)

 -- Brian Murray <email address hidden> Wed, 05 Aug 2020 18:08:39 -0700

Changed in apport (Ubuntu Bionic):
status: Fix Committed → Fix Released

The verification of the Stable Release Update for apport has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

tags: added: fr-191
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