REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1336 In function DevPathToTextUsbWWID, the Length parameter is used without check. This patch is to add check before using it. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <liming.gao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>