[edk2-devel] [PATCH v2] SecurityPkg/Tpm2Help.c: Add boundary check for array

[Zhang, Shenglei]

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

Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Jian J Wang <jian.j.wang at intel.com>
Cc: Chao Zhang <chao.b.zhang at intel.com>
Signed-off-by: Shenglei Zhang <shenglei.zhang at intel.com>
---
v2: Remove the comma operator and use &&.

 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..d7bc94006003 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


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.

View/Reply Online (#52242): https://edk2.groups.io/g/devel/message/52242
Mute This Topic: https://groups.io/mt/68718554/1813853
Group Owner: devel+owner at edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub  [edk2-devel-archive at redhat.com]
-=-=-=-=-=-=-=-=-=-=-=-