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Bug 614911 - PyXML causes segfault of Python parsing certain XML files: contains own copy of pyexpat - need compat fix for expat-2.0.1
Summary: PyXML causes segfault of Python parsing certain XML files: contains own copy ...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: PyXML
Version: 6.0
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Roman Rakus
QA Contact: Michal Nowak
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-07-15 14:36 UTC by Dave Malcolm
Modified: 2014-01-13 00:12 UTC (History)
7 users (show)

Fixed In Version: PyXML-0.8.4-19.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-11-10 19:32:36 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Dave Malcolm 2010-07-15 14:36:41 UTC 
Description of problem:
PyXML seems to have its own copy of pyexpat.so, and seems to shadow it if it's installed.

It seems to be missing the fix I made for bug 583931 for compatibility with expat-2.0.1 in the main python rpm:
* Mon Jun 21 2010 David Malcolm <dmalcolm> - 2.6.2-10
- Fix an incompatibility between pyexpat and the system expat-2.0.1 that led to
a segfault running test_pyexpat.py (patch 117)

This leads to a segfault when parsing certain XML files; running test_pyexpat.py will show it up.

Version-Release number of selected component (if applicable):
python-2.6.5-2.el6.x86_64
python-test-2.6.5-2.el6.x86_64
PyXML-0.8.4-18.el6.x86_64
expat-2.0.1-9.1.el6.x86_64


How reproducible:
100%

Steps to Reproduce:
1. python /usr/lib*/python2.6/test/test_pyexpat.py with PyXML installed

Actual results:
test_ordered_attributes (__main__.SetAttributeTest) ... ok
...(snip)...
test_parse_only_xml_data (__main__.sf1296433Test) ... Segmentation fault (core dumped)

Expected results:
All tests should pass; no segfault

Additional info:
Shouldn't we consolidate on having a single copy of pyexpat.so?
Comment 5 Roman Rakus 2010-07-19 17:41:41 UTC 
(In reply to comment #0)
> Description of problem:
> PyXML seems to have its own copy of pyexpat.so, and seems to shadow it if it's
> installed.
True
> 
> It seems to be missing the fix I made for bug 583931 for compatibility with
> expat-2.0.1 in the main python rpm:
> * Mon Jun 21 2010 David Malcolm <dmalcolm> - 2.6.2-10
> - Fix an incompatibility between pyexpat and the system expat-2.0.1 that led to
> a segfault running test_pyexpat.py (patch 117)
> 
> This leads to a segfault when parsing certain XML files; running
> test_pyexpat.py will show it up.
> 
True
> Version-Release number of selected component (if applicable):
> python-2.6.5-2.el6.x86_64
> python-test-2.6.5-2.el6.x86_64
> PyXML-0.8.4-18.el6.x86_64
> expat-2.0.1-9.1.el6.x86_64
> 
> 
> How reproducible:
> 100%
> 
> Steps to Reproduce:
> 1. python /usr/lib*/python2.6/test/test_pyexpat.py with PyXML installed
> 
> Actual results:
> test_ordered_attributes (__main__.SetAttributeTest) ... ok
> ...(snip)...
> test_parse_only_xml_data (__main__.sf1296433Test) ... Segmentation fault (core
> dumped)
> 
> Expected results:
> All tests should pass; no segfault
> 
> Additional info:
> Shouldn't we consolidate on having a single copy of pyexpat.so?    
Yep. Since the python itself has pyexpat (using lib expat) it is nonsense to have PyXML at all.
Comment 6 Roman Rakus 2010-07-19 17:48:24 UTC 
Correcting my words:
Since the python itself has pyexpat (using lib expat) it is nonsense to
have it in PyXML at all.
In other words, I will get a rid of pyexapt.so from PyXML
Comment 9 Roman Rakus 2010-07-20 12:40:46 UTC 
Ready to commit. Awaiting all ack+s
Comment 10 Roman Rakus 2010-07-21 13:28:34 UTC 
Fixed in PyXML-0.8.4-19.el6
Comment 15 releng-rhel@redhat.com 2010-11-10 19:32:36 UTC 
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.
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