src/http/ngx_http_file_cache.c:261: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_http_file_cache_exists`.

src/http/ngx_http_file_cache.c:261:10: Call
259.     }
260. 
261.     rc = ngx_http_file_cache_exists(cache, c);
              ^
262. 
263.     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,

src/http/ngx_http_file_cache.c:507:1: Parameter `cache->bsize`
  505. 
  506. 
  507. static ngx_int_t
       ^
  508. ngx_http_file_cache_exists(ngx_http_file_cache_t *cache, ngx_http_cache_t *c)
  509. {

src/http/ngx_http_file_cache.c:563:16: Call
  561.         ngx_shmtx_unlock(&cache->shpool->mutex);
  562. 
  563.         (void) ngx_http_file_cache_forced_expire(cache);
                      ^
  564. 
  565.         ngx_shmtx_lock(&cache->shpool->mutex);

src/http/ngx_http_file_cache.c:988:1: Parameter `cache->bsize`
    986. 
    987. 
    988. static time_t
         ^
    989. ngx_http_file_cache_forced_expire(ngx_http_file_cache_t *cache)
    990. {

src/http/ngx_http_file_cache.c:1029:13: Call
    1027. 
    1028.         if (fcn->count == 0) {
    1029.             ngx_http_file_cache_delete(cache, q, name);
                      ^
    1030. 
    1031.         } else {

src/http/ngx_http_file_cache.c:1138:1: <LHS trace>
1136. 
1137. 
1138. static void
      ^
1139. ngx_http_file_cache_delete(ngx_http_file_cache_t *cache, ngx_queue_t *q,
1140.     u_char *name)

src/http/ngx_http_file_cache.c:1138:1: Parameter `cache->bsize`
      1136. 
      1137. 
      1138. static void
            ^
      1139. ngx_http_file_cache_delete(ngx_http_file_cache_t *cache, ngx_queue_t *q,
      1140.     u_char *name)

src/http/ngx_http_file_cache.c:1150:9: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_http_file_cache_exists` 
      1148. 
      1149.     if (fcn->exists) {
      1150.         cache->sh->size -= (fcn->length + cache->bsize - 1) / cache->bsize;
                    ^
      1151. 
      1152.         path = cache->path;
