Red Hat Bugzilla – Bug 800197
Bugs found in wireshark-1.6.5-1.fc17 using gcc-with-cpychecker static analyzer
Last modified: 2015-02-17 09:09:31 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
wireshark-1.6.5-1.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):
I've manually reviewed the issues reported by the tool.
Within the category "Reference leaks" the 4 issues reported appear to be genuine leaks, though for the first:
wspy_register.c:py_dissector_name:ob_refcnt of '*py_object_name' is 1 too high: it's not clear if this is fixable, and if it's actually an issue
For the other three, they all involve a call to PyObject_CallMethod in which the return value is ignored. These should all have a Py_XDECREF() on the return value.
Within the category "Segfaults within error-handling paths" the 1 issue reported may or may not be a genuine bug; it's impossible to tell without more context.
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 11462291a66c8db693c8884cb84b795bb5988ffb running the checker in an *f16* chroot
I posted it into uptstram bugzilla: https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7011
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:
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