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Fix memory out of band access in AsmFxSave() and AsmFxRestore(). 

Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13894 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
lgao4 2012-10-30 08:35:08 +00:00
parent 73a324f801
commit 2054fd132a
2 changed files with 4 additions and 4 deletions
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4
MdePkg/Library/BaseLib/X86FxRestore.c
View File

@ -1,7 +1,7 @@
/** @file
IA-32/x64 AsmFxRestore()
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2012, 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
@ -43,7 +43,7 @@ AsmFxRestore (
//
// Check the flag recorded by AsmFxSave()
//
ASSERT (0xAA5555AA == *(UINT32 *) (&Buffer[sizeof (IA32_FX_BUFFER) - 4]));
ASSERT (0xAA5555AA == *(UINT32 *) (&Buffer->Buffer[sizeof (Buffer->Buffer) - 4]));
InternalX86FxRestore (Buffer);
}

4
MdePkg/Library/BaseLib/X86FxSave.c
View File

@ -1,7 +1,7 @@
/** @file
IA-32/x64 AsmFxSave()
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2012, 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
@ -44,5 +44,5 @@ AsmFxSave (
//
// Mark one flag at end of Buffer, it will be check by AsmFxRestor()
//
*(UINT32 *) (&Buffer[sizeof (IA32_FX_BUFFER) - 4]) = 0xAA5555AA;
*(UINT32 *) (&Buffer->Buffer[sizeof (Buffer->Buffer) - 4]) = 0xAA5555AA;
}