Red Hat Bugzilla – Bug 795001
Bugs found in nautilus-python-1.1-1.fc17 using gcc-with-cpychecker static analyzer
Last modified: 2015-02-17 09:07:45 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
nautilus-python-1.1-1.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 1 issue reported
nautilus-python-object.c:nautilus_python_object_cancel_update:ob_refcnt of new ref from call to PyObject_CallMethod is 1 too high
looks like a true memory leak.
Within the category "Segfaults within error-handling paths" the 1 issue reported
nautilus-python-object.c:nautilus_python_boxed_new:dereferencing NULL (self->gtype) at nautilus-python-object.c:133
looks like a true bug: this could segfault under low-memory conditions.
Within the category "Possible reference leaks" the 5 issues reported look like they could also be memory leaks (although one of them is in an initialization routine).
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 771455b3128b1323e80bdda53939d8d140a84c68 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.)
More information and reason for this action is here:
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