message: fixed CID#1397936
diff: @@ -239,7 +239,11 @@ static int swSignalfd_onSignal(swReactor *reactor, swEvent *event)
  swWarn("read from signalfd failed. Error: %s[%d]", strerror(errno), errno);
  return SW_ERR;
  }
  -
  + if (siginfo.ssi_signo >= SW_SIGNO_MAX)
  + {
  + swWarn("unknown signal[%d].", siginfo.ssi_signo);
  + return SW_ERR;
  + }
  if (signals[siginfo.ssi_signo].active)
  {
  if (signals[siginfo.ssi_signo].callback)
  