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_proc_memory_maps(PyObject *self, PyObject *args) {
    int pid;
    int fd = -1;
    char path[1000];
    char perms[10];
    const char *name;
    struct stat st;
    pstatus_t status;

    prxmap_t *xmap = NULL, *p;
    off_t size;
    size_t nread;
    int nmap;
    uintptr_t pr_addr_sz;
    uintptr_t stk_base_sz, brk_base_sz;
    const char *procfs_path;

    PyObject *py_tuple = NULL;
    PyObject *py_path = NULL;
    PyObject *py_retlist = PyList_New(0);

    if (py_retlist == NULL)
        return NULL;
    if (! PyArg_ParseTuple(args, "is", &pid, &procfs_path))
        goto error;

    sprintf(path, "%s/%i/status", procfs_path, pid);
    if (! psutil_file_to_struct(path, (void *)&status, sizeof(status)))
        goto error;

    sprintf(path, "%s/%i/xmap", procfs_path, pid);
    if (stat(path, &st) == -1) {
        PyErr_SetFromErrno(PyExc_OSError);
        goto error;
    }

    size = st.st_size;

    fd = open(path, O_RDONLY);
    if (fd == -1) {
        PyErr_SetFromErrno(PyExc_OSError);
        goto error;
    }

    xmap = (prxmap_t *)malloc(size);
    if (xmap == NULL) {
        PyErr_NoMemory();
        goto error;
    }

    nread = pread(fd, xmap, size, 0);
    nmap = nread / sizeof(prxmap_t);
    p = xmap;

    while (nmap) {
        nmap -= 1;
        if (p == NULL) {
            p += 1;
            continue;
        }

        perms[0] = '\0';
        pr_addr_sz = p->pr_vaddr + p->pr_size;

        // perms
        sprintf(perms, "%c%c%c%c", p->pr_mflags & MA_READ ? 'r' : '-',
                p->pr_mflags & MA_WRITE ? 'w' : '-',
                p->pr_mflags & MA_EXEC ? 'x' : '-',
                p->pr_mflags & MA_SHARED ? 's' : '-');

        // name
        if (strlen(p->pr_mapname) > 0) {
            name = p->pr_mapname;
        }
        else {
            if ((p->pr_mflags & MA_ISM) || (p->pr_mflags & MA_SHM)) {
                name = "[shmid]";
            }
            else {
                stk_base_sz = status.pr_stkbase + status.pr_stksize;
                brk_base_sz = status.pr_brkbase + status.pr_brksize;

                if ((pr_addr_sz > status.pr_stkbase) &&
                        (p->pr_vaddr < stk_base_sz)) {
                    name = "[stack]";
                }
                else if ((p->pr_mflags & MA_ANON) && \
                         (pr_addr_sz > status.pr_brkbase) && \
                         (p->pr_vaddr < brk_base_sz)) {
                    name = "[heap]";
                }
                else {
                    name = "[anon]";
                }
            }
        }

        py_path = PyUnicode_DecodeFSDefault(name);
        if (! py_path)
            goto error;
        py_tuple = Py_BuildValue(
            "kksOkkk",
            (unsigned long)p->pr_vaddr,
            (unsigned long)pr_addr_sz,
            perms,
            py_path,
            (unsigned long)p->pr_rss * p->pr_pagesize,
            (unsigned long)p->pr_anon * p->pr_pagesize,
            (unsigned long)p->pr_locked * p->pr_pagesize);
        if (!py_tuple)
            goto error;
        if (PyList_Append(py_retlist, py_tuple))
            goto error;
        Py_DECREF(py_path);
        Py_DECREF(py_tuple);

        // increment pointer
        p += 1;
    }

    close(fd);
    free(xmap);
    return py_retlist;

error:
    if (fd != -1)
        close(fd);
    Py_XDECREF(py_tuple);
    Py_XDECREF(py_path);
    Py_DECREF(py_retlist);
    if (xmap != NULL)
        free(xmap);
    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.'