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MdeModulePkg: Fix potential integer overflow issue

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In certain rare circumstance, the data passed from outside of SMM may be
invalid resulting the integer overflow. The issue are found by code review.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17908 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ruiyu Ni
2015-07-10 02:16:42 +00:00
committed by niruiyu
parent d7fc5cfd68
commit 579b5ef204
2 changed files with 20 additions and 15 deletions
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3
MdeModulePkg/Library/SmmLockBoxLib/SmmLockBoxSmmLib.c
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@@ -1,6 +1,6 @@
/** @file
Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions
@@ -394,6 +394,7 @@ UpdateLockBox (
DEBUG ((EFI_D_INFO, "SmmLockBoxSmmLib UpdateLockBox - Exit (%r)\n", EFI_BUFFER_TOO_SMALL));
return EFI_BUFFER_TOO_SMALL;
}
ASSERT ((UINTN)LockBox->SmramBuffer <= (MAX_ADDRESS - Offset));
CopyMem ((VOID *)((UINTN)LockBox->SmramBuffer + Offset), Buffer, Length);
//