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MdeModulePkg PiSmmCore: Set ForwardLink to NULL in RemoveOldEntry() 

"Entry->Link.ForwardLink = NULL;" is present in RemoveMemoryMapEntry()
for DxeCore, that is correct.
"Entry->Link.ForwardLink = NULL;" is absent in RemoveOldEntry()
for PiSmmCore, that is incorrect.

Without this fix, when FromStack in Entry is TRUE,
the "InsertTailList (&mMapStack[mMapDepth].Link, &Entry->Link);" in
following calling to CoreFreeMemoryMapStack() will fail as the entry
at mMapStack[mMapDepth] actually has been removed from the list.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Star Zeng 2018-01-25 11:20:04 +08:00
parent 19ef86eec6
commit e434be3c9c
1 changed files with 3 additions and 1 deletions
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4
MdeModulePkg/Core/PiSmmCore/Page.c
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@ -1,7 +1,7 @@
/** @file
SMM Memory page management functions.
Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2009 - 2018, 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
@ -246,6 +246,8 @@ RemoveOldEntry (
)
{
RemoveEntryList (&Entry->Link);
Entry->Link.ForwardLink = NULL;
if (!Entry->FromStack) {
InsertTailList (&mFreeMemoryMapEntryList, &Entry->Link);
}