From: Szymon Heidrich szymon.heidrich@gmail.com
commit 7f14c7227f342d9932f9b918893c8814f86d2a0d upstream.
Assure that host may not manipulate the index to point past endpoint array.
Signed-off-by: Szymon Heidrich szymon.heidrich@gmail.com Cc: stable stable@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/udc/udc-xilinx.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/usb/gadget/udc/udc-xilinx.c +++ b/drivers/usb/gadget/udc/udc-xilinx.c @@ -1620,6 +1620,8 @@ static void xudc_getstatus(struct xusb_u break; case USB_RECIP_ENDPOINT: epnum = udc->setup.wIndex & USB_ENDPOINT_NUMBER_MASK; + if (epnum >= XUSB_MAX_ENDPOINTS) + goto stall; target_ep = &udc->ep[epnum]; epcfgreg = udc->read_fn(udc->addr + target_ep->offset); halt = epcfgreg & XUSB_EP_CFG_STALL_MASK; @@ -1687,6 +1689,10 @@ static void xudc_set_clear_feature(struc case USB_RECIP_ENDPOINT: if (!udc->setup.wValue) { endpoint = udc->setup.wIndex & USB_ENDPOINT_NUMBER_MASK; + if (endpoint >= XUSB_MAX_ENDPOINTS) { + xudc_ep0_stall(udc); + return; + } target_ep = &udc->ep[endpoint]; outinbit = udc->setup.wIndex & USB_ENDPOINT_DIR_MASK; outinbit = outinbit >> 7;