Given the following code containing errors, provide Common Weakness Enumeration (CWE) identifiers and corresponding messages in JSON format. Each identified weakness should have a unique entry in the JSON array.
    Code: psutil_disk_io_counters(PyObject *self, PyObject *args) {
    CFDictionaryRef parent_dict;
    CFDictionaryRef props_dict;
    CFDictionaryRef stats_dict;
    io_registry_entry_t parent;
    io_registry_entry_t disk;
    io_iterator_t disk_list;
    PyObject *py_disk_info = NULL;
    PyObject *py_retdict = PyDict_New();

    if (py_retdict == NULL)
        return NULL;

    // Get list of disks
    if (IOServiceGetMatchingServices(kIOMasterPortDefault,
                                     IOServiceMatching(kIOMediaClass),
                                     &disk_list) != kIOReturnSuccess) {
        PyErr_SetString(
            PyExc_RuntimeError, "unable to get the list of disks.");
        goto error;
    }

    // Iterate over disks
    while ((disk = IOIteratorNext(disk_list)) != 0) {
        py_disk_info = NULL;
        parent_dict = NULL;
        props_dict = NULL;
        stats_dict = NULL;

        if (IORegistryEntryGetParentEntry(disk, kIOServicePlane, &parent)
                != kIOReturnSuccess) {
            PyErr_SetString(PyExc_RuntimeError,
                            "unable to get the disk's parent.");
            IOObjectRelease(disk);
            goto error;
        }

        if (IOObjectConformsTo(parent, "IOBlockStorageDriver")) {
            if (IORegistryEntryCreateCFProperties(
                    disk,
                    (CFMutableDictionaryRef *) &parent_dict,
                    kCFAllocatorDefault,
                    kNilOptions
                ) != kIOReturnSuccess)
            {
                PyErr_SetString(PyExc_RuntimeError,
                                "unable to get the parent's properties.");
                IOObjectRelease(disk);
                IOObjectRelease(parent);
                goto error;
            }

            if (IORegistryEntryCreateCFProperties(
                    parent,
                    (CFMutableDictionaryRef *) &props_dict,
                    kCFAllocatorDefault,
                    kNilOptions
                ) != kIOReturnSuccess)
            {
                PyErr_SetString(PyExc_RuntimeError,
                                "unable to get the disk properties.");
                CFRelease(props_dict);
                IOObjectRelease(disk);
                IOObjectRelease(parent);
                goto error;
            }

            const int kMaxDiskNameSize = 64;
            CFStringRef disk_name_ref = (CFStringRef)CFDictionaryGetValue(
                parent_dict, CFSTR(kIOBSDNameKey));
            char disk_name[kMaxDiskNameSize];

            CFStringGetCString(disk_name_ref,
                               disk_name,
                               kMaxDiskNameSize,
                               CFStringGetSystemEncoding());

            stats_dict = (CFDictionaryRef)CFDictionaryGetValue(
                props_dict, CFSTR(kIOBlockStorageDriverStatisticsKey));

            if (stats_dict == NULL) {
                PyErr_SetString(PyExc_RuntimeError,
                                "Unable to get disk stats.");
                goto error;
            }

            CFNumberRef number;
            int64_t reads = 0;
            int64_t writes = 0;
            int64_t read_bytes = 0;
            int64_t write_bytes = 0;
            int64_t read_time = 0;
            int64_t write_time = 0;

            // Get disk reads/writes
            if ((number = (CFNumberRef)CFDictionaryGetValue(
                    stats_dict,
                    CFSTR(kIOBlockStorageDriverStatisticsReadsKey))))
            {
                CFNumberGetValue(number, kCFNumberSInt64Type, &reads);
            }
            if ((number = (CFNumberRef)CFDictionaryGetValue(
                    stats_dict,
                    CFSTR(kIOBlockStorageDriverStatisticsWritesKey))))
            {
                CFNumberGetValue(number, kCFNumberSInt64Type, &writes);
            }

            // Get disk bytes read/written
            if ((number = (CFNumberRef)CFDictionaryGetValue(
                    stats_dict,
                    CFSTR(kIOBlockStorageDriverStatisticsBytesReadKey))))
            {
                CFNumberGetValue(number, kCFNumberSInt64Type, &read_bytes);
            }
            if ((number = (CFNumberRef)CFDictionaryGetValue(
                    stats_dict,
                    CFSTR(kIOBlockStorageDriverStatisticsBytesWrittenKey))))
            {
                CFNumberGetValue(number, kCFNumberSInt64Type, &write_bytes);
            }

            // Get disk time spent reading/writing (nanoseconds)
            if ((number = (CFNumberRef)CFDictionaryGetValue(
                    stats_dict,
                    CFSTR(kIOBlockStorageDriverStatisticsTotalReadTimeKey))))
            {
                CFNumberGetValue(number, kCFNumberSInt64Type, &read_time);
            }
            if ((number = (CFNumberRef)CFDictionaryGetValue(
                    stats_dict,
                    CFSTR(kIOBlockStorageDriverStatisticsTotalWriteTimeKey))))
            {
                CFNumberGetValue(number, kCFNumberSInt64Type, &write_time);
            }

            // Read/Write time on macOS comes back in nanoseconds and in psutil
            // we've standardized on milliseconds so do the conversion.
            py_disk_info = Py_BuildValue(
                "(KKKKKK)",
                reads,
                writes,
                read_bytes,
                write_bytes,
                read_time / 1000 / 1000,
                write_time / 1000 / 1000);
           if (!py_disk_info)
                goto error;
            if (PyDict_SetItemString(py_retdict, disk_name, py_disk_info))
                goto error;
            Py_DECREF(py_disk_info);

            CFRelease(parent_dict);
            IOObjectRelease(parent);
            CFRelease(props_dict);
            IOObjectRelease(disk);
        }
    }

    IOObjectRelease (disk_list);

    return py_retdict;

error:
    Py_XDECREF(py_disk_info);
    Py_DECREF(py_retdict);
    return NULL;
} ; Sample JSON Format Confermily Expected output: "examples" => "cwe": "xxx"; "message": "xxx"
    
 'cwe': ['CWE-415'], 'message': 'Use Py_CLEAR instead of Py_DECREF to also set the variable to NULL (#1616)

These files contain loops that convert system data into python objects
and during the process they create objects and dereference their
refcounts after they have been added to the resulting list.

However, in case of errors during the creation of those python objects,
the refcount to previously allocated objects is dropped again with
Py_XDECREF, which should be a no-op in case the paramater is NULL. Even
so, in most of these loops the variables pointing to the objects are
never set to NULL, even after Py_DECREF is called at the end of the loop
iteration. This means, after the first iteration, if an error occurs
those python objects will get their refcount dropped two times,
resulting in a possible double-free.'