diff options
| -rw-r--r-- | MdeModulePkg/Bus/Usb/UsbMouseAbsolutePointerDxe/UsbMouseAbsolutePointer.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/MdeModulePkg/Bus/Usb/UsbMouseAbsolutePointerDxe/UsbMouseAbsolutePointer.c b/MdeModulePkg/Bus/Usb/UsbMouseAbsolutePointerDxe/UsbMouseAbsolutePointer.c index 965195c..42b9147 100644 --- a/MdeModulePkg/Bus/Usb/UsbMouseAbsolutePointerDxe/UsbMouseAbsolutePointer.c +++ b/MdeModulePkg/Bus/Usb/UsbMouseAbsolutePointerDxe/UsbMouseAbsolutePointer.c @@ -813,8 +813,6 @@ OnMouseInterruptComplete ( return EFI_SUCCESS;
}
- UsbMouseAbsolutePointerDevice->StateChanged = TRUE;
-
//
// Check mouse Data
// USB HID Specification specifies following data format:
@@ -827,6 +825,12 @@ OnMouseInterruptComplete ( // 2 0 to 7 Y displacement
// 3 to n 0 to 7 Device specific (optional)
//
+ if (DataLength < 3) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ UsbMouseAbsolutePointerDevice->StateChanged = TRUE;
+
UsbMouseAbsolutePointerDevice->State.ActiveButtons = *(UINT8 *) Data & (BIT0 | BIT1 | BIT2);
UsbMouseAbsolutePointerDevice->State.CurrentX =
|