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limit length of wLength

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This commit is contained in:
Conor Patrick 2019-07-15 11:32:02 -04:00
parent df2f950e69
commit 303c42901a
1 changed files with 2 additions and 0 deletions
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2
targets/stm32l432/lib/usbd/usbd_hid.c
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@ -342,6 +342,7 @@ static uint8_t USBD_HID_Setup (USBD_HandleTypeDef *pdev,
uint8_t *pbuf = NULL; uint8_t *pbuf = NULL;
uint16_t status_info = 0U; uint16_t status_info = 0U;
USBD_StatusTypeDef ret = USBD_OK; USBD_StatusTypeDef ret = USBD_OK;
req->wLength = req->wLength & 0x7f;
switch (req->bmRequest & USB_REQ_TYPE_MASK) switch (req->bmRequest & USB_REQ_TYPE_MASK)
{ {
@ -386,6 +387,7 @@ static uint8_t USBD_HID_Setup (USBD_HandleTypeDef *pdev,
break; break;
case USB_REQ_GET_DESCRIPTOR: case USB_REQ_GET_DESCRIPTOR:
req->wLength = req->wLength & 0x7f;
if(req->wValue >> 8 == HID_REPORT_DESC) if(req->wValue >> 8 == HID_REPORT_DESC)
{ {
len = MIN(HID_FIDO_REPORT_DESC_SIZE , req->wLength); len = MIN(HID_FIDO_REPORT_DESC_SIZE , req->wLength);