In function ngx_http_vhost_traffic_status_display_get_size，we calculate the buffer size，the max name size default is 1024(un * 1024)，but in function ngx_http_vhost_traffic_status_shm_add_node，we add a vts node and set vtsn->len = (u_short) key->len，so the vtsn->len max value is 65535. this will cause memory out of bounds，when we call status cmd，because the buffer size we calculate may be too small.