MdeModulePkg PiSmmIpl: Handle CommSize OPTIONAL case
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>
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@@ -544,7 +544,7 @@ SmmEntryPoint (
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// return EFI_INVALID_PARAMETER
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//
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gSmmCorePrivate->CommunicationBuffer = NULL;
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gSmmCorePrivate->ReturnStatus = EFI_INVALID_PARAMETER;
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gSmmCorePrivate->ReturnStatus = EFI_ACCESS_DENIED;
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} else {
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CommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *)CommunicationBuffer;
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BufferSize -= OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data);
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