--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -1626,6 +1626,9 @@ ngx_http_fastcgi_process_header(ngx_http
         }
 
         part = ngx_array_push(f->split_parts);
+        if (part == NULL) {
+            return NGX_ERROR;
+        }
 
         part->start = part_start;
         part->end = part_end;

--- a/src/http/modules/ngx_http_limit_conn_module.c
+++ b/src/http/modules/ngx_http_limit_conn_module.c
@@ -721,6 +721,10 @@ ngx_http_limit_conn(ngx_conf_t *cf, ngx_
     }
 
     limit = ngx_array_push(&lccf->limits);
+    if (limit == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
     limit->conn = n;
     limit->shm_zone = shm_zone;
 

--- a/src/http/modules/ngx_http_limit_req_module.c
+++ b/src/http/modules/ngx_http_limit_req_module.c
@@ -937,6 +937,9 @@ ngx_http_limit_req(ngx_conf_t *cf, ngx_c
     }
 
     limit = ngx_array_push(&lrcf->limits);
+    if (limit == NULL) {
+        return NGX_CONF_ERROR;
+    }
 
     limit->shm_zone = shm_zone;
     limit->burst = burst * 1000;