[PATCH] usb: gadget: fsl_qe_udc: validate endpoint index for ch9 udc

[Ma Ke]

We should verify the bound of the array to assure that host
may not manipulate the index to point past endpoint array.

Signed-off-by: Ma Ke <make_ruc2...@163.com>
---
 drivers/usb/gadget/udc/fsl_qe_udc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c 
b/drivers/usb/gadget/udc/fsl_qe_udc.c
index 3b1cc8fa30c8..f4e5cbd193b7 100644
--- a/drivers/usb/gadget/udc/fsl_qe_udc.c
+++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
@@ -1959,6 +1959,8 @@ static void ch9getstatus(struct qe_udc *udc, u8 
request_type, u16 value,
        } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
                /* Get endpoint status */
                int pipe = index & USB_ENDPOINT_NUMBER_MASK;
+               if (pipe >= USB_MAX_ENDPOINTS)
+                       goto stall;
                struct qe_ep *target_ep = &udc->eps[pipe];
                u16 usep;
 
-- 
2.37.2