From: Liu, Zhiguang <zhiguang.liu@intel.com>
Sent: Thursday, April 25, 2024 12:40
To: devel@edk2.groups.io <devel@edk2.groups.io>
Cc: Liu, Zhiguang <zhiguang.liu@intel.com>; Liming Gao <gaoliming@byosoft.com.cn>; Wu, Jiaxin <jiaxin.wu@intel.com>; Ni, Ray <ray.ni@intel.com>; Laszlo Ersek <lersek@redhat.com>
Subject: [PATCH 1/2] MdeModulePkg/SMM: Initialize 'WillReturn' variable

The local variable 'WillReturn' was being used without prior
initialization in some code paths.
This patch ensures that 'WillReturn' is properly initialized
to prevent undefined behavior.

Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>

Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
---
MdeModulePkg/Core/PiSmmCore/Smi.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/MdeModulePkg/Core/PiSmmCore/Smi.c b/MdeModulePkg/Core/PiSmmCore/Smi.c
index a84a1f48d3..6b56fa5f69 100644
--- a/MdeModulePkg/Core/PiSmmCore/Smi.c
+++ b/MdeModulePkg/Core/PiSmmCore/Smi.c
@@ -152,6 +152,7 @@ SmiManage (

   PERF_FUNCTION_BEGIN ();
   mSmiManageCallingDepth++;
+ WillReturn   = FALSE;
   Status       = EFI_NOT_FOUND;
   ReturnStatus = Status;
   if (HandlerType == NULL) {
--
2.31.1.windows.1