Bug 800158

Summary: Bugs found in python-jinja-1.2-7.fc17 using gcc-with-cpychecker static analyzer
Product: [Fedora] Fedora Reporter: Dave Malcolm <dmalcolm>
Component: python-jinjaAssignee: Thomas Moschny <thomas.moschny>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: a.badger, thomas.moschny
Target Milestone: ---Keywords: FutureFeature
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
URL: http://fedorapeople.org/~dmalcolm/gcc-python-plugin/2012-03-05/python-jinja-1.2-7.fc17/
Whiteboard:
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-05-19 15:56:14 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 789472    

Description Dave Malcolm 2012-03-05 21:05:21 UTC 
Description of problem:
I've been writing an experimental static analysis tool to detect bugs commonly occurring within C Python extension modules:
  https://fedorahosted.org/gcc-python-plugin/
  http://gcc-python-plugin.readthedocs.org/en/latest/cpychecker.html
  http://fedoraproject.org/wiki/Features/StaticAnalysisOfPythonRefcounts

I ran the latest version of the tool (in git master; post 0.9) on
python-jinja-1.2-7.fc17.src.rpm, and it reports various errors.

You can see a list of errors here, triaged into categories (from most significant to least significant):
http://fedorapeople.org/~dmalcolm/gcc-python-plugin/2012-03-05/python-jinja-1.2-7.fc17/

I've manually reviewed the issues reported by the tool.

Within the category "Segfaults within error-handling paths" the 3 issues reported appear to be genuine crashers under low-memory conditions, where the code assumes that PyMem_Malloc() succeeds.

Within the category "Returning (PyObject*)NULL without setting an exception" the 1 issue reported appears to be a genuine bug: PyMem_Malloc() doesn't set an exception when it fails.

There may of course be other bugs in my checker tool.

Hope this is helpful; let me know if you need help reading the logs that the tool generates - I know that it could use some improvement.

Version-Release number of selected component (if applicable):
python-jinja-1.2-7.fc17
gcc-python-plugin post-0.9 git 11462291a66c8db693c8884cb84b795bb5988ffb running the checker in an *f16* chroot
Comment 1 Thomas Moschny 2012-03-16 17:46:46 UTC 
Not sure what to do with this bug. jinja is not actively developed anymore. In Fedora, only olpc-library depends on it.

So I guess upstream is not interested in fixing these bugs, and I don't have enough time to do so. If you provide patches, I'll happily integrate them though. The speedup module is now part of python-markupsafe, so maybe one can backport something from there.
Comment 2 Fedora End Of Life 2013-04-03 19:46:27 UTC 
This bug appears to have been reported against 'rawhide' during the Fedora 19 development cycle.
Changing version to '19'.

(As we did not run this process for some time, it could affect also pre-Fedora 19 development
cycle bugs. We are very sorry. It will help us with cleanup during Fedora 19 End Of Life. Thank you.)

More information and reason for this action is here:
https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora19