[PATCH 1/1] RFC: SecurityPkg: only clear HashInterface informations

[marcandre.lureau@redhat.com]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

The ZeroMem() call goes beyond the HashInterfaceHob structure, causing
HOB list corruption. Instead, just clear the HashInterface fields, as
I suppose was originally intended.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 .../HashLibBaseCryptoRouter/HashLibBaseCryptoRouterPei.c       | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/SecurityPkg/Library/HashLibBaseCryptoRouter/HashLibBaseCryptoRouterPei.c b/SecurityPkg/Library/HashLibBaseCryptoRouter/HashLibBaseCryptoRouterPei.c
index dbee0f2531bc..361a4f6508a0 100644
--- a/SecurityPkg/Library/HashLibBaseCryptoRouter/HashLibBaseCryptoRouterPei.c
+++ b/SecurityPkg/Library/HashLibBaseCryptoRouter/HashLibBaseCryptoRouterPei.c
@@ -424,7 +424,8 @@ HashLibBaseCryptoRouterPeiConstructor (
     // This is the second execution of this module, clear the hash interface
     // information registered at its first execution.
     //
-    ZeroMem (&HashInterfaceHob->HashInterface, sizeof (*HashInterfaceHob) - sizeof (EFI_GUID));
+    ZeroMem (&HashInterfaceHob->HashInterface, sizeof (HashInterfaceHob->HashInterface));
+    HashInterfaceHob->HashInterfaceCount = 0;
   }
 
   //
-- 
2.16.2.346.g9779355e34