[PATCH 1/2] MdeModulePkg/Core: fill logic hole in MemoryProtectionCpuArchProtocolNotify

[Jian J Wang <jian.j.wang@intel.com>]

At the end of of MemoryProtectionCpuArchProtocolNotify there's cleanup
code to free resource. But at line 978, 994, 1005 the function returns
directly. This patch use "goto" to replace "return" to make sure the
resource is freed before exit.

1029:  CoreCloseEvent (Event);
1030:  return;

Cc: Star Zeng <star.zeng@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
---
 MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c | 42 +++++++++++++--------------
 1 file changed, 21 insertions(+), 21 deletions(-)

diff --git a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c
index 6298b67db1..30e5c5153c 100644
--- a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c
+++ b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c
@@ -975,7 +975,7 @@ MemoryProtectionCpuArchProtocolNotify (
   DEBUG ((DEBUG_INFO, "MemoryProtectionCpuArchProtocolNotify:\n"));
   Status = CoreLocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **)&gCpu);
   if (EFI_ERROR (Status)) {
-    return;
+    goto Done;
   }
 
   //
@@ -991,7 +991,7 @@ MemoryProtectionCpuArchProtocolNotify (
   HeapGuardCpuArchProtocolNotify ();
 
   if (mImageProtectionPolicy == 0) {
-    return;
+    goto Done;
   }
 
   Status = gBS->LocateHandleBuffer (
@@ -1002,7 +1002,7 @@ MemoryProtectionCpuArchProtocolNotify (
                   &HandleBuffer
                   );
   if (EFI_ERROR (Status) && (NoHandles == 0)) {
-    return ;
+    goto Done;
   }
 
   for (Index = 0; Index < NoHandles; Index++) {
@@ -1026,8 +1026,8 @@ MemoryProtectionCpuArchProtocolNotify (
     ProtectUefiImage (LoadedImage, LoadedImageDevicePath);
   }
 
+Done:
   CoreCloseEvent (Event);
-  return;
 }
 
 /**
@@ -1136,24 +1136,24 @@ CoreInitializeMemoryProtection (
           GetPermissionAttributeForMemoryType (EfiConventionalMemory));
 
   if (mImageProtectionPolicy != 0 || PcdGet64 (PcdDxeNxMemoryProtectionPolicy) != 0) {
-    Status = CoreCreateEvent (
-               EVT_NOTIFY_SIGNAL,
-               TPL_CALLBACK,
-               MemoryProtectionCpuArchProtocolNotify,
-               NULL,
-               &Event
-               );
-    ASSERT_EFI_ERROR(Status);
+  Status = CoreCreateEvent (
+             EVT_NOTIFY_SIGNAL,
+             TPL_CALLBACK,
+             MemoryProtectionCpuArchProtocolNotify,
+             NULL,
+             &Event
+             );
+  ASSERT_EFI_ERROR(Status);
 
-    //
-    // Register for protocol notifactions on this event
-    //
-    Status = CoreRegisterProtocolNotify (
-               &gEfiCpuArchProtocolGuid,
-               Event,
-               &Registration
-               );
-    ASSERT_EFI_ERROR(Status);
+  //
+  // Register for protocol notifactions on this event
+  //
+  Status = CoreRegisterProtocolNotify (
+             &gEfiCpuArchProtocolGuid,
+             Event,
+             &Registration
+             );
+  ASSERT_EFI_ERROR(Status);
   }
 
   //
-- 
2.16.2.windows.1