[Bug 1748509] Re: do-partial-upgrade crashed with SIGSEGV under wayland

[Launchpad Bug Tracker]

This bug was fixed in the package update-manager - 1:18.04.4

---------------
update-manager (1:18.04.4) bionic; urgency=medium

  [ Balint Reczey ]
  * Place .keep files in empty directories to keep them when converting the
    repo to git
  * Call do-release-upgrade without pkexec and depend on a version which
    raises privileges itself (LP: #1748509)

  [ Jeremy Bicha ]
  * update-manager: Depend on libgtk3-perl for debconf's GNOME backend.
    Drop previous Recommends on libgtk2-perl. (LP: #1607929)

 -- Balint Reczey <rbalint at ubuntu.com>  Fri, 02 Mar 2018 10:44:01 +0700

** Changed in: update-manager (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1748509

Title:
   do-partial-upgrade crashed with SIGSEGV under wayland

Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released
Status in update-manager package in Ubuntu:
  Fix Released

Bug description:
  [Impact]

  Users can't upgrade to next Ubuntu release running the upgrade GUI under Wayland if a full upgrade fails and update-manager fails back to a partial upgrade.
  The backport is needed to let Artful users to upgrade to Bionic without applying workarounds manually.

  [Test Case (for update-manager)]

  1. Install 17.10 and all the updates available
  2. TODO: Make changes to make the full upgrade fail and as a result update-manager fall back to partial upgrade.
  3. Start a wayland session (Ubuntu in GDM)
  4. Check that root is not listed in xhost output:
    $ xhost
    access control enabled, only authorized clients can connect
    SI:localuser:rbalint
  5. If root is present, remove it:
    $ xhost -si:localuser:root
    localuser:root being removed from access control list
    $ xhost
    access control enabled, only authorized clients can connect
    SI:localuser:rbalint
  6. open a terminal and run the following command:
    $ update-manager -cd
  7. When you're prompted to upgrade to 18.04, accept and proceed.
    Expected result on fixed version: Upgrade starts.
    Result on unfixed version: The GUI crashes.

  [Test Case (for ubuntu-release-upgrader)]

  1. Install 17.10 and all the updates available
  2. Start a wayland session (Ubuntu in GDM)
  3. Check that root is not listed in xhost output:
    $ xhost
    access control enabled, only authorized clients can connect
    SI:localuser:rbalint
  4. If root is present, remove it:
    $ xhost -si:localuser:root
    localuser:root being removed from access control list
    $ xhost
    access control enabled, only authorized clients can connect
    SI:localuser:rbalint
  5. open a terminal and run the following command:
    $ /usr/lib/ubuntu-release-upgrader/do-partial-upgrade --frontend=DistUpgradeViewGtk3
  6. When you're prompted to upgrade to 18.04, accept and proceed.
    Expected result on fixed version: Upgrade asks for password to raise privileges then starts.
    Result on unfixed version: The command crashes.

  [Test Case (for regressions)]

  Repeat the test cases running under X.org (Ubuntu on Xorg in GDM) and check that:
  a. Upgrade still works
  b. xhost output is not modified

  [Regression Potential]

  The upgrade GUI may crash in a different way when applying the workaround fails.
  Do-partial-upgrade may fail to detect development or versions to upgrade to.
  The workaround "xhost +si:localuser:root" may be added under Xorg as well

  [Other Info]
  This bug covers performing a a partial upgrade which case is not covered int the fix for LP: #1732185 .

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