In Udp6Dxe, there are several places use ASSERT to check returned value. But these errors should be handled if they occur, this patch is to fix this issue. Cc: Ye Ting <ting.ye@intel.com> Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Fu Siyuan <siyuan.fu@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Wang Fan <fan.wang@intel.com> Reviewed-by: Jiaxin Wu <jiaxin.wu@intel.com>