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: static ssize_t o2nm_node_local_store(struct config_item *item, const char *page,
				     size_t count)
{
	struct o2nm_node *node = to_o2nm_node(item);
	struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node);
	unsigned long tmp;
	char *p = (char *)page;
	ssize_t ret;

	tmp = simple_strtoul(p, &p, 0);
	if (!p || (*p && (*p != '\n')))
		return -EINVAL;

	tmp = !!tmp; /* boolean of whether this node wants to be local */

	/* setting local turns on networking rx for now so we require having
	 * set everything else first */
	if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) ||
	    !test_bit(O2NM_NODE_ATTR_NUM, &node->nd_set_attributes) ||
	    !test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes))
		return -EINVAL; /* XXX */

	/* the only failure case is trying to set a new local node
	 * when a different one is already set */
	if (tmp && tmp == cluster->cl_has_local &&
	    cluster->cl_local_node != node->nd_num)
		return -EBUSY;

	/* bring up the rx thread if we're setting the new local node. */
	if (tmp && !cluster->cl_has_local) {
		ret = o2net_start_listening(node);
		if (ret)
			return ret;
	}

	if (!tmp && cluster->cl_has_local &&
	    cluster->cl_local_node == node->nd_num) {
		o2net_stop_listening(node);
		cluster->cl_local_node = O2NM_INVALID_NODE_NUM;
	}

	node->nd_local = tmp;
	if (node->nd_local) {
		cluster->cl_has_local = tmp;
		cluster->cl_local_node = node->nd_num;
	}

	return count;
} ; Sample JSON Format Confermily Expected output: "examples" => "cwe": "xxx"; "message": "xxx"
    
 'cwe': ['CWE-476', 'CWE-284'], 'message': 'ocfs2: subsystem.su_mutex is required while accessing the item->ci_parent

The subsystem.su_mutex is required while accessing the item->ci_parent,
otherwise, NULL pointer dereference to the item->ci_parent will be
triggered in the following situation:

add node                     delete node
sys_write
 vfs_write
  configfs_write_file
   o2nm_node_store
    o2nm_node_local_write
                             do_rmdir
                              vfs_rmdir
                               configfs_rmdir
                                mutex_lock(&subsys->su_mutex);
                                unlink_obj
                                 item->ci_group = NULL;
                                 item->ci_parent = NULL;
	 to_o2nm_cluster_from_node
	  node->nd_item.ci_parent->ci_parent
	  BUG since of NULL pointer dereference to nd_item.ci_parent

Moreover, the o2nm_cluster also should be protected by the
subsystem.su_mutex.

[alex.chen@huawei.com: v2]
  Link: http://lkml.kernel.org/r/59EEAA69.9080703@huawei.com
Link: http://lkml.kernel.org/r/59E9B36A.10700@huawei.com
Signed-off-by: Alex Chen <alex.chen@huawei.com>
Reviewed-by: Jun Piao <piaojun@huawei.com>
Reviewed-by: Joseph Qi <jiangqi903@gmail.com>
Cc: Mark Fasheh <mfasheh@versity.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>'