diff options
Diffstat (limited to 'SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c')
| -rw-r--r-- | SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c b/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c index 9f750d6780..5a02b77d53 100644 --- a/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c +++ b/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c @@ -442,8 +442,15 @@ RuntimeServiceSetVariable ( return EFI_INVALID_PARAMETER;
}
+ if ((UINTN)(~0) - StrSize (VariableName) < OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) + DataSize) {
+ //
+ // Prevent PayloadSize overflow
+ //
+ return EFI_INVALID_PARAMETER;
+ }
+
AcquireLockOnlyAtBootTime(&mVariableServicesLock);
-
+
//
// Init the communicate buffer. The buffer data size is:
// SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.
|