diff options
| -rw-r--r-- | MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c index 7bd18620d2..ad7988f3d6 100644 --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c @@ -502,6 +502,12 @@ SmmVariableHandler ( goto EXIT;
}
+ //
+ // The AsmLfence() call here is to ensure the previous range/content
+ // checks for the CommBuffer have been completed before the subsequent
+ // consumption of the CommBuffer content.
+ //
+ AsmLfence ();
if (SmmVariableHeader->NameSize < sizeof (CHAR16) || SmmVariableHeader->Name[SmmVariableHeader->NameSize/sizeof (CHAR16) - 1] != L'\0') {
//
// Make sure VariableName is A Null-terminated string.
@@ -596,6 +602,12 @@ SmmVariableHandler ( goto EXIT;
}
+ //
+ // The AsmLfence() call here is to ensure the previous range/content
+ // checks for the CommBuffer have been completed before the subsequent
+ // consumption of the CommBuffer content.
+ //
+ AsmLfence ();
if (SmmVariableHeader->NameSize < sizeof (CHAR16) || SmmVariableHeader->Name[SmmVariableHeader->NameSize/sizeof (CHAR16) - 1] != L'\0') {
//
// Make sure VariableName is A Null-terminated string.
|