Fix the bug that HiiConfigToBlock doesn't update BlockSize when Block is not large enough

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11085 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 24 insertions, 8 deletions

diff --git a/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigRouting.c b/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigRouting.c
index 2e73924..4f83fe3 100644
--- a/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigRouting.c
+++ b/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigRouting.c
@@ -3224,6 +3224,10 @@ Exit:
                                  value pair. Block is left updated and

                                  Progress points at the '&' preceding the first

                                  non-<BlockName>.

+  @retval EFI_DEVICE_ERROR       Block not large enough. Progress undefined.

+  @retval EFI_NOT_FOUND          Target for the specified routing data was not found.

+                                 Progress points to the "G" in "GUID" of the errant

+                                 routing data.

 

 **/

 EFI_STATUS

@@ -3245,13 +3249,14 @@ HiiConfigToBlock (
   UINTN                               Width;

   UINT8                               *Value;

   UINTN                               BufferSize;

+  UINTN                               MaxBlockSize;

 

   if (This == NULL || BlockSize == NULL || Progress == NULL) {

     return EFI_INVALID_PARAMETER;

   }

 

-  if (ConfigResp == NULL || Block == NULL) {

-    *Progress = ConfigResp;

+  *Progress = ConfigResp;

+  if (ConfigResp == NULL) {

     return EFI_INVALID_PARAMETER;

   }

 

@@ -3261,6 +3266,7 @@ HiiConfigToBlock (
   StringPtr  = ConfigResp;

   BufferSize = *BlockSize;

   Value      = NULL;

+  MaxBlockSize = 0;

 

   //

   // Jump <ConfigHdr>

@@ -3366,13 +3372,12 @@ HiiConfigToBlock (
     //

     // Update the Block with configuration info

     //

-

-    if (Offset + Width > BufferSize) {

-      return EFI_DEVICE_ERROR;

+    if ((Block != NULL) && (Offset + Width <= BufferSize)) {

+      CopyMem (Block + Offset, Value, Width);

+    }

+    if (Offset + Width > MaxBlockSize) {

+      MaxBlockSize = Offset + Width;

     }

-

-    CopyMem (Block + Offset, Value, Width);

-    *BlockSize = Offset + Width - 1;

 

     FreePool (Value);

     Value = NULL;

@@ -3397,6 +3402,17 @@ HiiConfigToBlock (
   }

 

   *Progress = StringPtr + StrLen (StringPtr);

+  *BlockSize = MaxBlockSize - 1;

+

+  if (MaxBlockSize > BufferSize) {

+    *BlockSize = MaxBlockSize;

+    if (Block == NULL) {

+      return EFI_INVALID_PARAMETER;

+    } else {

+      return EFI_DEVICE_ERROR;

+    }

+  }

+

   return EFI_SUCCESS;

 

 Exit: