Add 'Index < HASH_COUNT' to ensure things out of boundary
of digests[] can not be visited.

Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Jian J Wang <jian.j.w...@intel.com>
Cc: Chao Zhang <chao.b.zh...@intel.com>
Signed-off-by: Shenglei Zhang <shenglei.zh...@intel.com>
---
 SecurityPkg/Library/Tpm2CommandLib/Tpm2Help.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/SecurityPkg/Library/Tpm2CommandLib/Tpm2Help.c 
b/SecurityPkg/Library/Tpm2CommandLib/Tpm2Help.c
index 36c240d1221c..a7d4e3ab5373 100644
--- a/SecurityPkg/Library/Tpm2CommandLib/Tpm2Help.c
+++ b/SecurityPkg/Library/Tpm2CommandLib/Tpm2Help.c
@@ -299,7 +299,7 @@ GetDigestListSize (
   UINT32 TotalSize;
 
   TotalSize = sizeof(DigestList->count);
-  for (Index = 0; Index < DigestList->count; Index++) {
+  for (Index = 0; Index < DigestList->count, Index < HASH_COUNT; Index++) {
     DigestSize = GetHashSizeFromAlgo (DigestList->digests[Index].hashAlg);
     TotalSize += sizeof(DigestList->digests[Index].hashAlg) + DigestSize;
   }
-- 
2.18.0.windows.1


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