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MdePkg/SmmMemLib: Avoid possible NULL ptr dereference

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Within function SmmMemLibInternalGetUefiMemoryAttributesTable(), add a
check to avoid possible null pointer dereference.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Hao Wu 2018-07-30 13:17:31 +08:00
parent 39f0156fce
commit 264914a512
1 changed files with 1 additions and 1 deletions
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2
MdePkg/Library/SmmMemLib/SmmMemLib.c
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@ -439,7 +439,7 @@ SmmMemLibInternalGetUefiMemoryAttributesTable (
UINTN MemoryAttributesTableSize;
Status = EfiGetSystemConfigurationTable (&gEfiMemoryAttributesTableGuid, (VOID **)&MemoryAttributesTable);
if (!EFI_ERROR (Status)) {
if (!EFI_ERROR (Status) && (MemoryAttributesTable != NULL)) {
MemoryAttributesTableSize = sizeof(EFI_MEMORY_ATTRIBUTES_TABLE) + MemoryAttributesTable->DescriptorSize * MemoryAttributesTable->NumberOfEntries;
mSmmMemLibMemoryAttributesTable = AllocateCopyPool (MemoryAttributesTableSize, MemoryAttributesTable);
ASSERT (mSmmMemLibMemoryAttributesTable != NULL);