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MdeModulePkg PiSmmIpl: Handle CommSize OPTIONAL case

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Handle CommSize OPTIONAL case for SmmCommunicate.
And return EFI_ACCESS_DENIED when CommunicationBuffer
is not valid for SMM to access.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Liming Gao <liming.gao@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
2017-11-07 13:42:21 +08:00
parent c53190e910
commit d1632f694b
2 changed files with 40 additions and 23 deletions
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2
MdeModulePkg/Core/PiSmmCore/PiSmmCore.c
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@@ -544,7 +544,7 @@ SmmEntryPoint (
// return EFI_INVALID_PARAMETER
//
gSmmCorePrivate->CommunicationBuffer = NULL;
gSmmCorePrivate->ReturnStatus = EFI_INVALID_PARAMETER;
gSmmCorePrivate->ReturnStatus = EFI_ACCESS_DENIED;
} else {
CommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *)CommunicationBuffer;
BufferSize -= OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data);