limit length of wLength

2019-07-15 11:32:02 -04:00
1 changed files with 2 additions and 0 deletions
--- a/targets/stm32l432/lib/usbd/usbd_hid.c
+++ b/targets/stm32l432/lib/usbd/usbd_hid.c
@ -342,6 +342,7 @@ static uint8_t  USBD_HID_Setup (USBD_HandleTypeDef *pdev,
  uint8_t *pbuf = NULL;
  uint16_t status_info = 0U;
  USBD_StatusTypeDef ret = USBD_OK;
+  req->wLength = req->wLength & 0x7f;

  switch (req->bmRequest & USB_REQ_TYPE_MASK)
  {
@ -386,6 +387,7 @@ static uint8_t  USBD_HID_Setup (USBD_HandleTypeDef *pdev,
      break;

    case USB_REQ_GET_DESCRIPTOR:
+      req->wLength = req->wLength & 0x7f;
      if(req->wValue >> 8 == HID_REPORT_DESC)
      {
        len = MIN(HID_FIDO_REPORT_DESC_SIZE , req->wLength);