Red Hat Bugzilla – Bug 790983
Segfault under low-memory conditions found in libxml2-2.7.8-6.fc16 using gcc-with-cpychecker static analyzer
Last modified: 2015-02-17 09:07:04 EST
Description of problem:
I've been writing an experimental static analysis tool to detect bugs commonly occurring within C Python extension modules:
I ran the latest version of the tool (in git master; post 0.9) on libxml2-2.7.8-6.fc16.src.rpm, and it reports various errors.
You can see a list of errors here, triaged into categories (from most significant to least significant):
Most of the reported errors appear to be false positives, but within the "Segfaults within error-handling paths" category, every bug I've looked at appears to be a genuine crasher, where there's a function call that could fail and return NULL, where the NULL case isn't being handled.
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):
gcc-python-plugin post-0.9 git 073d390de53ef52136bd90e5ac06f1ef833d047d running the checker in an *f16* chroot
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.)
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