MdeModulePkg/BootManagerMenu: Add assertion to indicate no DIV by 0

BootMenuSelectItem() contains code to DIV BootMenuData->ItemCount.
When BootMenuData->ItemCount can be 0, the DIV operation may
trigger CPU exception.
But in logic, this case won't happen. So add assertion to indicate
it.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/MdeModulePkg/Application/BootManagerMenuApp/BootManagerMenu.c b/MdeModulePkg/Application/BootManagerMenuApp/BootManagerMenu.c
index 6d493e1250..a25f2ca298 100644
--- a/MdeModulePkg/Application/BootManagerMenuApp/BootManagerMenu.c
+++ b/MdeModulePkg/Application/BootManagerMenuApp/BootManagerMenu.c
@@ -1,7 +1,7 @@
 /** @file

   The application to show the Boot Manager Menu.

 

-Copyright (c) 2011 - 2016, Intel Corporation. All rights reserved.<BR>

+Copyright (c) 2011 - 2017, Intel Corporation. All rights reserved.<BR>

 This program and the accompanying materials

 are licensed and made available under the terms and conditions of the BSD License

 which accompanies this distribution.  The full text of the license may be found at

@@ -374,6 +374,7 @@ BootMenuSelectItem (
   if (BootMenuData == NULL || WantSelectItem >= BootMenuData->ItemCount) {

     return EFI_INVALID_PARAMETER;

   }

+  ASSERT (BootMenuData->ItemCount != 0);

   SavedAttribute = gST->ConOut->Mode->Attribute;

   RePaintItems = FALSE;

   StartCol = BootMenuData->MenuScreen.StartCol;