UefiCpuPkg/PiSmmCpu: Add SMM Comm Buffer Paging Protection.

[mirror_edk2.git] / UefiCpuPkg / PiSmmCpuDxeSmm / X64 / PageTbl.c

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
index 7237e57e7e404e33498bf1566724b63fdc31b782..17b2f4cb1851f4d9b218c2af4c93fa14e41b84e9 100644 (file)
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
@@ -867,6 +867,13 @@ SmiPFHandler (
       );\r
       CpuDeadLoop ();\r
     }\r
+    if (IsSmmCommBufferForbiddenAddress (PFAddress)) {\r
+      DEBUG ((DEBUG_ERROR, "Access SMM communication forbidden address (0x%lx)!\n", PFAddress));\r
+      DEBUG_CODE (\r
+        DumpModuleInfoByIp ((UINTN)SystemContext.SystemContextX64->Rip);\r
+      );\r
+      CpuDeadLoop ();\r
+    }\r
   }\r
 \r
   if (FeaturePcdGet (PcdCpuSmmProfileEnable)) {\r