UefiCpuPkg/PiSmmCpu: Add SMM Comm Buffer Paging Protection.

[mirror_edk2.git] / UefiCpuPkg / PiSmmCpuDxeSmm / Ia32 / PageTbl.c

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
index ba79477e645dab687ad560fe2cbde46464e6aa4e..c1f4b7e13d189e18c6e06f219aec377bef8f5124 100644 (file)
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
@@ -149,6 +149,13 @@ SmiPFHandler (
       );\r
       CpuDeadLoop ();\r
     }\r
+    if (IsSmmCommBufferForbiddenAddress (PFAddress)) {\r
+      DEBUG ((DEBUG_ERROR, "Access SMM communication forbidden address (0x%x)!\n", PFAddress));\r
+      DEBUG_CODE (\r
+        DumpModuleInfoByIp ((UINTN)SystemContext.SystemContextIa32->Eip);\r
+      );\r
+      CpuDeadLoop ();\r
+    }\r
   }\r
 \r
   if (FeaturePcdGet (PcdCpuSmmProfileEnable)) {\r