src/http/ngx_http_request.c:962: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `ngx_http_finalize_request`.

src/http/ngx_http_request.c:949:22: Call
947.             if (r->header_in->pos == r->header_in->end) {
948. 
949.                 rv = ngx_http_alloc_large_header_buffer(r, 0);
                          ^
950. 
951.                 if (rv == NGX_ERROR) {

src/http/ngx_http_request.c:1147:1: Parameter `*r->header_in->pos`
  1145. 
  1146. 
  1147. static ngx_int_t
        ^
  1148. ngx_http_alloc_large_header_buffer(ngx_http_request_t *r,
  1149.     ngx_uint_t request_line)

src/http/ngx_http_request.c:962:25: Call
960.                         ngx_log_error(NGX_LOG_INFO, c->log, 0,
961.                                       "client sent too large request");
962.                         ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
                             ^
963.                         return;
964.                     }

src/http/ngx_http_request.c:1835:1: Parameter `r->uri_changes`
  1833. 
  1834. 
  1835. void
        ^
  1836. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
  1837. {

src/http/ngx_http_request.c:1874:13: Call
  1872.         || c->error)
  1873.     {
  1874.         if (ngx_http_post_action(r) == NGX_OK) {
                    ^
  1875.             return;
  1876.         }

src/http/ngx_http_request.c:2834:1: Parameter `r->uri_changes`
    2832. 
    2833. 
    2834. static ngx_int_t
          ^
    2835. ngx_http_post_action(ngx_http_request_t *r)
    2836. {

src/http/ngx_http_request.c:2857:9: Call
    2855. 
    2856.     if (clcf->post_action.data[0] == '/') {
    2857.         ngx_http_internal_redirect(r, &clcf->post_action, NULL);
                  ^
    2858. 
    2859.     } else {

src/http/ngx_http_core_module.c:2149:1: <LHS trace>
2147. 
2148. 
2149. ngx_int_t
      ^
2150. ngx_http_internal_redirect(ngx_http_request_t *r,
2151.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2149:1: Parameter `r->uri_changes`
      2147. 
      2148. 
      2149. ngx_int_t
            ^
      2150. ngx_http_internal_redirect(ngx_http_request_t *r,
      2151.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2155:5: Binary operation: ([0, +oo] - 1):unsigned32 by call to `ngx_http_finalize_request` 
      2153.     ngx_http_core_srv_conf_t  *cscf;
      2154. 
      2155.     r->uri_changes--;
                ^
      2156. 
      2157.     if (r->uri_changes == 0) {
