src/http/ngx_http_file_cache.c:1950: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_slab_free_locked`.

src/http/ngx_http_file_cache.c:1950:9: Call
1948.         ngx_queue_remove(q);
1949.         ngx_rbtree_delete(&cache->sh->rbtree, &fcn->node);
1950.         ngx_slab_free_locked(cache->shpool, fcn);
              ^
1951.         cache->sh->count--;
1952.     }

src/core/ngx_slab.c:457:1: <LHS trace>
455. 
456. 
457. void
     ^
458. ngx_slab_free_locked(ngx_slab_pool_t *pool, void *p)
459. {

src/core/ngx_slab.c:457:1: Global `ngx_pagesize`
  455. 
  456. 
  457. void
       ^
  458. ngx_slab_free_locked(ngx_slab_pool_t *pool, void *p)
  459. {

src/core/ngx_slab.c:488:9: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_slab_free_locked` 
  486.         }
  487. 
  488.         n = ((uintptr_t) p & (ngx_pagesize - 1)) >> shift;
               ^
  489.         m = (uintptr_t) 1 << (n % (8 * sizeof(uintptr_t)));
  490.         n /= 8 * sizeof(uintptr_t);
