MdeModulePkg SmmLockBox: Return updated Length for EFI_BUFFER_TOO_SMALL

The updated Length value should be returned
for EFI_BUFFER_TOO_SMALL case.

Cc: Jiewen Yao <jiewen.yao@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>

1 files changed, 4 insertions, 1 deletions

diff --git a/MdeModulePkg/Universal/LockBox/SmmLockBox/SmmLockBox.c b/MdeModulePkg/Universal/LockBox/SmmLockBox/SmmLockBox.c
index 2dc8815..d4183ca 100644
--- a/MdeModulePkg/Universal/LockBox/SmmLockBox/SmmLockBox.c
+++ b/MdeModulePkg/Universal/LockBox/SmmLockBox/SmmLockBox.c
@@ -9,7 +9,7 @@
   SmmLockBoxHandler(), SmmLockBoxRestore(), SmmLockBoxUpdate(), SmmLockBoxSave()

   will receive untrusted input and do basic validation.

 

-Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>

+Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>

 

 This program and the accompanying materials

 are licensed and made available under the terms and conditions

@@ -217,6 +217,9 @@ SmmLockBoxRestore (
                (VOID *)(UINTN)TempLockBoxParameterRestore.Buffer,

                (UINTN *)&TempLockBoxParameterRestore.Length

                );

+    if (Status == EFI_BUFFER_TOO_SMALL) {

+      LockBoxParameterRestore->Length = TempLockBoxParameterRestore.Length;

+    }

   }

   LockBoxParameterRestore->Header.ReturnStatus = (UINT64)Status;

   return ;