modules/proxy/mod_proxy_ajp.c:289: error: INTEGER_OVERFLOW_L2
  ([3, +oo] - 4):unsigned64 by call to `ajp_send_data_msg`.

modules/proxy/mod_proxy_ajp.c:284:9: Unknown value from: apr_brigade_cleanup
282.             return HTTP_INTERNAL_SERVER_ERROR;
283.         }
284.         apr_brigade_cleanup(input_brigade);
             ^
285. 
286.         ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00875)

modules/proxy/mod_proxy_ajp.c:289:22: Call
287.                       "got %" APR_SIZE_T_FMT " bytes of data", bufsiz);
288.         if (bufsiz > 0) {
289.             status = ajp_send_data_msg(conn->sock, msg, bufsiz);
                          ^
290.             ajp_msg_log(r, msg, "First ajp_send_data_msg: ajp_ilink_send packet dump");
291.             if (status != APR_SUCCESS) {

modules/proxy/ajp_header.c:820:1: Parameter `len`
  818.  * Send the data message
  819.  */
  820. apr_status_t  ajp_send_data_msg(apr_socket_t *sock,
       ^
  821.                                 ajp_msg_t *msg, apr_size_t len)
  822. {

modules/proxy/ajp_header.c:827:5: Assignment
  825.     msg->buf[5] = (apr_byte_t)(len & 0xFF);
  826. 
  827.     msg->len += len + 2; /* + 1 XXXX where is '\0' */
           ^
  828. 
  829.     return ajp_ilink_send(sock, msg);

modules/proxy/ajp_header.c:829:12: Call
  827.     msg->len += len + 2; /* + 1 XXXX where is '\0' */
  828. 
  829.     return ajp_ilink_send(sock, msg);
                  ^
  830. 
  831. }

modules/proxy/ajp_link.c:21:1: Parameter `msg->len`
    19. APLOG_USE_MODULE(proxy_ajp);
    20. 
    21. apr_status_t ajp_ilink_send(apr_socket_t *sock, ajp_msg_t *msg)
        ^
    22. {
    23.     char         *buf;

modules/proxy/ajp_link.c:27:5: Call
    25.     apr_size_t   length;
    26. 
    27.     ajp_msg_end(msg);
            ^
    28. 
    29.     length = msg->len;

modules/proxy/ajp_msg.c:220:1: <LHS trace>
218.  * @return          APR_SUCCESS or error
219.  */
220. apr_status_t ajp_msg_end(ajp_msg_t *msg)
     ^
221. {
222.     apr_size_t len = msg->len - AJP_HEADER_LEN;

modules/proxy/ajp_msg.c:220:1: Parameter `msg->len`
      218.  * @return          APR_SUCCESS or error
      219.  */
      220. apr_status_t ajp_msg_end(ajp_msg_t *msg)
           ^
      221. {
      222.     apr_size_t len = msg->len - AJP_HEADER_LEN;

modules/proxy/ajp_msg.c:222:5: Binary operation: ([3, +oo] - 4):unsigned64 by call to `ajp_send_data_msg` 
      220. apr_status_t ajp_msg_end(ajp_msg_t *msg)
      221. {
      222.     apr_size_t len = msg->len - AJP_HEADER_LEN;
               ^
      223. 
      224.     if (msg->server_side) {
