[Bug 1737635] Re: Invalid UTF-8 characters in dpkg's log crash unattended-upgrade.

[Łukasz Zemczak]

Hello errors.ubuntu.com, or anyone else affected,

Accepted unattended-upgrades into xenial-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/unattended-upgrades/1.1ubuntu1.18.04.7~16.04.2 in a few hours, and then
in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed 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 and change the tag from
verification-needed-xenial to verification-done-xenial. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-xenial. 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
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  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.

** Tags removed: verification-done verification-done-xenial
** Tags added: verification-needed verification-needed-xenial

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https://bugs.launchpad.net/bugs/1737635

Title:
  Invalid UTF-8 characters in dpkg's log crash unattended-upgrade.

Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in unattended-upgrades source package in Xenial:
  Fix Committed

Bug description:
  [Impact]

   * Unattended-upgrades crashes at the end of its run before sending
  out upgrade report email when dpkg's log contains invalid UTF-8
  characters.

  
  [Test Case]

   * Observe
  https://errors.ubuntu.com/problem/4617feba656f6ec216996b0f1f662ae13904b9f8
  not occurring again

  [Regression Potential]

   * The fix is minimal, only replacing invalid characters with �.
  Regressions in u-u are unlikely but tools may break consuming
  unattended-upgrades output in case they can't handle the replacement
  marker.

  [Original Bug Text]

  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 0.98ubuntu1, the problem page at https://errors.ubuntu.com/problem/2fa32547e0d8e7186a0a805e3db6f50317c0dafa contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 1706, in <module>
      main(options)
    File "/usr/bin/unattended-upgrade", line 1619, in main
      log_content = get_dpkg_log_content(logfile_dpkg, install_start_time)
    File "/usr/bin/unattended-upgrade", line 1229, in get_dpkg_log_content
      for line in fp.readlines():
    File "/usr/lib/python3.6/codecs.py", line 321, in decode
      (result, consumed) = self._buffer_decode(data, self.errors, final)
  UnicodeDecodeError: 'utf-8' codec can't decode bytes in position 7912-7913: invalid continuation byte

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