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bpo-35529: Fix a reference counting bug in PyCFuncPtr_FromDll(). (GH-11229)

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"dll" would leak if an error occurred in _validate_paramflags() or
GenericPyCData_new().
This commit is contained in:
Zackery Spytz 2018-12-20 01:29:38 -07:00 • committed by Serhiy Storchaka
parent b13a20f507
commit d77d97c9a1
1 changed files with 8 additions and 5 deletions
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13
Modules/_ctypes/_ctypes.c
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@ -3483,20 +3483,23 @@ PyCFuncPtr_FromDll(PyTypeObject *type, PyObject *args, PyObject *kwds)
return NULL;
}
#endif
Py_INCREF(dll); /* for KeepRef */
Py_DECREF(ftuple);
if (!_validate_paramflags(type, paramflags))
if (!_validate_paramflags(type, paramflags)) {
Py_DECREF(ftuple);
return NULL;
}
self = (PyCFuncPtrObject *)GenericPyCData_new(type, args, kwds);
if (!self)
if (!self) {
Py_DECREF(ftuple);
return NULL;
}
Py_XINCREF(paramflags);
self->paramflags = paramflags;
*(void **)self->b_ptr = address;
Py_INCREF(dll);
Py_DECREF(ftuple);
if (-1 == KeepRef((CDataObject *)self, 0, dll)) {
Py_DECREF((PyObject *)self);
return NULL;