[Patch 2/5] MdeModulePkg/DxeHttpLib: Avoid the potential memory leak when error happen.

[Jiaxin Wu <jiaxin.wu@intel.com>]

Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Wang Fan <fan.wang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
---
 MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.c b/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.c
index 4d353d7..27b94e3 100644
--- a/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.c
+++ b/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.c
@@ -369,10 +369,12 @@ HttpParseUrl (
   UINT32                Field;
   UINT32                OldField;
   BOOLEAN               FoundAt;
   EFI_STATUS            Status;
   HTTP_URL_PARSER       *Parser;
+
+  Parser = NULL;
   
   if (Url == NULL || Length == 0 || UrlParser == NULL) {
     return EFI_INVALID_PARAMETER;
   }
 
@@ -399,10 +401,11 @@ HttpParseUrl (
     //
     State = NetHttpParseUrlChar (*Char, State);
 
     switch (State) {
     case UrlParserStateMax:
+      FreePool (Parser);
       return EFI_INVALID_PARAMETER;
       
     case UrlParserSchemeColon:
     case UrlParserSchemeColonSlash:
     case UrlParserSchemeColonSlashSlash:
@@ -461,10 +464,11 @@ HttpParseUrl (
   // If has authority component, continue to parse the username, host and port.
   //
   if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_AUTHORITY)) != 0) {
     Status = NetHttpParseAuthority (Url, FoundAt, Parser);
     if (EFI_ERROR (Status)) {
+      FreePool (Parser);
       return Status;
     }
   }
 
   *UrlParser = Parser;
@@ -1525,10 +1529,11 @@ HttpSetFieldNameAndValue (
   HttpHeader->FieldName[FieldNameSize - 1] = 0;
 
   FieldValueSize = AsciiStrSize (FieldValue);
   HttpHeader->FieldValue = AllocateZeroPool (FieldValueSize);
   if (HttpHeader->FieldValue == NULL) {
+    FreePool (HttpHeader->FieldName);
     return EFI_OUT_OF_RESOURCES;
   }
   CopyMem (HttpHeader->FieldValue, FieldValue, FieldValueSize);
   HttpHeader->FieldValue[FieldValueSize - 1] = 0;
 
-- 
1.9.5.msysgit.1