Take the below code as example.
  if (Type >= 0 && Type <= ARRAY_SIZE(mSxTypeString)) {
    return mSxTypeString[Type];

The variable 'Type' used as index should range from 0 ~ ARRAY_SIZE-1.
So the if statement should be :
  if (Type >= 0 && Type < ARRAY_SIZE(mSxTypeString)) {

And other cases should also follow this rule.

REF:
https://bugzilla.tianocore.org/show_bug.cgi?id=2272
https://bugzilla.tianocore.org/show_bug.cgi?id=2287
https://bugzilla.tianocore.org/show_bug.cgi?id=2288
https://bugzilla.tianocore.org/show_bug.cgi?id=2289
https://bugzilla.tianocore.org/show_bug.cgi?id=2290

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com>
---
 .../SmiHandlerProfileInfo/SmiHandlerProfileInfo.c      | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/MdeModulePkg/Application/SmiHandlerProfileInfo/SmiHandlerProfileInfo.c b/MdeModulePkg/Application/SmiHandlerProfileInfo/SmiHandlerProfileInfo.c
index 0f7163160b4e..4f195b16ceb0 100644
--- a/MdeModulePkg/Application/SmiHandlerProfileInfo/SmiHandlerProfileInfo.c
+++ b/MdeModulePkg/Application/SmiHandlerProfileInfo/SmiHandlerProfileInfo.c
@@ -382,7 +382,7 @@ SxTypeToString (
   IN EFI_SLEEP_TYPE  Type
   )
 {
-  if (Type >= 0 && Type <= ARRAY_SIZE(mSxTypeString)) {
+  if (Type >= 0 && Type < ARRAY_SIZE(mSxTypeString)) {
     return mSxTypeString[Type];
   } else {
     AsciiSPrint (mNameString, sizeof(mNameString), "0x%x", Type);
@@ -407,7 +407,7 @@ SxPhaseToString (
   IN EFI_SLEEP_PHASE Phase
   )
 {
-  if (Phase >= 0 && Phase <= ARRAY_SIZE(mSxPhaseString)) {
+  if (Phase >= 0 && Phase < ARRAY_SIZE(mSxPhaseString)) {
     return mSxPhaseString[Phase];
   } else {
     AsciiSPrint (mNameString, sizeof(mNameString), "0x%x", Phase);
@@ -457,7 +457,7 @@ StandbyButtonPhaseToString (
   IN EFI_STANDBY_BUTTON_PHASE  Phase
   )
 {
-  if (Phase >= 0 && Phase <= ARRAY_SIZE(mStandbyButtonPhaseString)) {
+  if (Phase >= 0 && Phase < ARRAY_SIZE(mStandbyButtonPhaseString)) {
     return mStandbyButtonPhaseString[Phase];
   } else {
     AsciiSPrint (mNameString, sizeof(mNameString), "0x%x", Phase);
@@ -483,7 +483,7 @@ IoTrapTypeToString (
   IN EFI_SMM_IO_TRAP_DISPATCH_TYPE  Type
   )
 {
-  if (Type >= 0 && Type <= ARRAY_SIZE(mIoTrapTypeString)) {
+  if (Type >= 0 && Type < ARRAY_SIZE(mIoTrapTypeString)) {
     return mIoTrapTypeString[Type];
   } else {
     AsciiSPrint (mNameString, sizeof(mNameString), "0x%x", Type);
@@ -508,7 +508,7 @@ UsbTypeToString (
   IN EFI_USB_SMI_TYPE          Type
   )
 {
-  if (Type >= 0 && Type <= ARRAY_SIZE(mUsbTypeString)) {
+  if (Type >= 0 && Type < ARRAY_SIZE(mUsbTypeString)) {
     return mUsbTypeString[Type];
   } else {
     AsciiSPrint (mNameString, sizeof(mNameString), "0x%x", Type);
-- 
2.18.0.windows.1


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