cups crashes on SIGHUP if printer classes are defined

[Ray Link]

Affects: cups 1.4.3-1ubuntu1.5 on Lucid.

Ubuntu releases with a cups derived from 1.4.4 or later are unaffected.

Known bug in CUPS 1.4.3, fixed in 1.4.4. When cups receives a SIGHUP (for log rotation, restart, etc), the cleanup routines free pointers to printer policy info, but then later try to dereference them.

See attached patch directly from CUPS's svn repository. This patch contains the fix exactly as it made it into mainline cups 1.4.4. Patch has been tested against cups_1.4.3-1ubuntu1.5 and works.

Upstream SVN commit info here: http://www.cups.org/str.php?L3524

[Ubuntu Foundations Team Bug Bot (crichton)]

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[Didier Roche-Tolomelli (didrocks)]

Till, you are the one with the most knowledge on cups, can you have a look?

[Till Kamppeter (till-kamppeter)]

Uploaded patched CUPS package to -proposed. As soon as it gets approved it will get available for testing. We will then post a comment with instructions how to test. Please test and report here, so that we can make the fixed CUPS an official update for Lucid.

A debdiff of the changes is attached.

[Chris Halse Rogers (raof)]

Hello Ray, or anyone else affected,

Accepted cups into lucid-proposed. The package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

[Ray Link (rlink)]

Tested 1.4.3-1ubuntu1.6 from lucid-proposed.

Works fine.

[Clint Byrum (clint-fewbar)]

Till, is this fixed in precise? Its not clear from the bug status.

[Jeffrey Hutzelman (jhutz)]

This was never in precise; it was fixed upstream in 1.4.4, so doesn't affect anything newer than lucid.

[Till Kamppeter (till-kamppeter)]

Clint, the patch is a backport from upstream, therefore in Precise it is already included.

[Launchpad Janitor (janitor)]

This bug was fixed in the package cups - 1.4.3-1ubuntu1.6

---------------
cups (1.4.3-1ubuntu1.6) lucid-proposed; urgency=low

  * debian/patches/cupsd-fix-crash-on-sighup.dpatch: Fixed crash of the
    scheduler (CUPS daemon) on the SIGHUP signal (sent on log rotation,
    restart, ..., LP: #857663).
 -- Till Kamppeter <email address hidden> Wed, 28 Mar 2012 14:36:54 +0200