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path: root/Nt32Pkg/WinNtGopDxe/WinNtGopInput.c
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Diffstat (limited to 'Nt32Pkg/WinNtGopDxe/WinNtGopInput.c')
-rw-r--r--Nt32Pkg/WinNtGopDxe/WinNtGopInput.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/Nt32Pkg/WinNtGopDxe/WinNtGopInput.c b/Nt32Pkg/WinNtGopDxe/WinNtGopInput.c
index be41a8e..e986674 100644
--- a/Nt32Pkg/WinNtGopDxe/WinNtGopInput.c
+++ b/Nt32Pkg/WinNtGopDxe/WinNtGopInput.c
@@ -797,7 +797,11 @@ WinNtGopSimpleTextInExUnregisterKeyNotify (
if (NotificationHandle == NULL) {
return EFI_INVALID_PARAMETER;
}
-
+
+ if (((WIN_NT_GOP_SIMPLE_TEXTIN_EX_NOTIFY *) NotificationHandle)->Signature != WIN_NT_GOP_SIMPLE_TEXTIN_EX_NOTIFY_SIGNATURE) {
+ return EFI_INVALID_PARAMETER;
+ }
+
Private = GOP_PRIVATE_DATA_FROM_TEXT_IN_EX_THIS (This);
for (Link = Private->NotifyList.ForwardLink; Link != &Private->NotifyList; Link = Link->ForwardLink) {