registry team mailing list archive

[Nobuto MURATA <nobuto@xxxxxxxxxxxxxxxxx>]

** Description changed:

- After upgrading from Ubuntu Server 10.04 to Ubuntu Server 10.10, I
- noticed that security updates were no longer being applied automatically
- (contrary to my configuration).
+ [SRU for maverick]
+ 
+ * This bug makes unattended-upgrade completely unusable.
+ * This bug was fixed in upstream version 0.7.98.
+ * Just one-line backporting
+   https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/664514/+attachment/1769022/+files/python-apt_0.7.96.1ubuntu11.debdiff
+ 
+ TEST CASE:
+ 1. Use out-of-date system which has security update notification
+ 2. Run "$ sudo apt-get upgrade --download-only"
+ 3. Run "$ sudo unattended-upgrade -d" and get Segmentation fault
+ 4. Upgrade to -proposed package
+ 5. Run "$ sudo unattended-upgrade -d" and all security updates get installed
+ 
+ -----
+ After upgrading from Ubuntu Server 10.04 to Ubuntu Server 10.10, I noticed that security updates were no longer being applied automatically (contrary to my configuration).
  
  I did some poking around in the apt script (in etc/cron.daily).  Here is
  the output with debug mode on.  (I cleared out the time stamp files to
  force it to update now so errors regarding those are not important.)
  
  power status (255) undetermined, continuing
  system is on main power.
  sleeping for 739 seconds
  check_stamp: missing time stamp file: /var/lib/apt/periodic/update-stamp.
  apt-key net-update (success)
  download updated metadata (success).
  send dbus signal (success)
  X11 connection rejected because of wrong authentication.
  check_stamp: missing time stamp file: /var/lib/apt/periodic/download-upgradeable-stamp.
  download upgradable (success)
  check_stamp: missing time stamp file: /var/lib/apt/periodic/upgrade-stamp.
  Segmentation fault
  unattended-upgrade (error)
  check_stamp: missing time stamp file: /var/lib/apt/periodic/autoclean-stamp.
  autoclean (success).
  aged: ctime <30 and mtime <30 and ctime>2 and mtime>2
  end remove by archive size: size=412396 < 512000
  
  So, what's that seg fault in the middle there?  Turns out it is the call
  to /usr/bin/unattended-upgrade.
  
  I can actually reproduce it like this:
  
  $ sudo unattended-upgrade
  Segmentation fault
  
  Now, this is about all I know how to do to debug the issue.  If you'd
  like me to run a stack trace or something on unattended-upgrade to
  figure out why it is crashing, please point me towards some directions
  to do so.  (I notice that it is a python script and I am not very
  familiar with python.)  In any case, this is a security issue, since
  security updates cannot be installed automatically, I have to remember
  to check the server often to make sure that security updates are
  applied.

-- 
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https://bugs.launchpad.net/bugs/664514

Title:
  Unattended upgrade fails with segmentation fault in Ubuntu Server 10.10