[Bug 1961800] Re: Seeing out of memory errors after upgrade to 2.2.5-3ubuntu0.4

[Francis Ginther]

Attached is an example config file and python script which demonstrates
the parsing error. This was reproduced on focal with:

$ apt-cache policy libexpat1
libexpat1:
  Installed: 2.2.9-1ubuntu0.2
  Candidate: 2.2.9-1ubuntu0.2
  Version table:
 *** 2.2.9-1ubuntu0.2 500
        500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
        100 /var/lib/dpkg/status
     2.2.9-1build1 500
        500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages


This example worked with 2.2.9-1build1 but not 2.2.9-1ubuntu0.2.

To run the example:

$ ./parser_example.py ./sample-config.xml


The sample-config.xml was generated by jenkins (version 2.303.2) of a freestyle project with only the job name and description set.

** Attachment added: "sample-config-and-parser.tgz"
   https://bugs.launchpad.net/ubuntu/+source/expat/+bug/1961800/+attachment/5562745/+files/sample-config-and-parser.tgz

** Summary changed:

- Seeing out of memory errors after upgrade to 2.2.5-3ubuntu0.4
+ Seeing out of memory errors after upgrade to 2.2.5-3ubuntu0.4 (bionic) or 2.2.9-1ubuntu0.2 (focal)

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to expat in Ubuntu.
https://bugs.launchpad.net/bugs/1961800

Title:
  Seeing out of memory errors after upgrade to 2.2.5-3ubuntu0.4 (bionic)
  or 2.2.9-1ubuntu0.2 (focal)

Status in expat package in Ubuntu:
  New

Bug description:
  I started seeing errors parsing XML files today (Feb 22, 2022) after
  my system was updated to 2.2.5-3ubuntu0.4. This is on a bionic server.

  The parsing is being done by python3's xmltodict module, which uses
  python3 expat as the actual parser. This is the error it raises:

  xml.parsers.expat.ExpatError: out of memory: line 1, column 0

  So far this is happening on multiple xml files, although they all come
  from the same source (these are jenkins config.xml files). I'm working
  on coming up with a minimal test case which I'll provide once I have
  it cleaned up of any private data.

  [System info]
  $ lsb_release -rd
  Description:    Ubuntu 18.04.6 LTS
  Release:        18.04

  $ apt-cache policy libexpat1
  libexpat1:
    Installed: 2.2.5-3ubuntu0.4
    Candidate: 2.2.5-3ubuntu0.4
    Version table:
   *** 2.2.5-3ubuntu0.4 500
          500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
          500 http://archive.ubuntu.com/ubuntu bionic-security/main amd64 Packages
          100 /var/lib/dpkg/status
       2.2.5-3 500
          500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/expat/+bug/1961800/+subscriptions