From: David Brownell Date: Mon, 10 Dec 2007 06:53:09 +0000 (-0800) Subject: USB: gadget: at91_udc minor fix (there is no number six) X-Git-Tag: firefly_0821_release~23568^2~50 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1440e0967de8c598dae96d741652d498b3eb8f27;p=firefly-linux-kernel-4.4.55.git USB: gadget: at91_udc minor fix (there is no number six) Fix a small glitch noted by Yannick Cote. There is no endpoint number six, so if a (broken) host wrongly tried to change or read status of that endpoint, the driver could access reserved register space. Signed-off-by: David Brownell Cc: Yannick Cote Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c index 4b6ed353ae36..305db36a3b1c 100644 --- a/drivers/usb/gadget/at91_udc.c +++ b/drivers/usb/gadget/at91_udc.c @@ -1153,7 +1153,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) | USB_REQ_GET_STATUS: tmp = w_index & USB_ENDPOINT_NUMBER_MASK; ep = &udc->ep[tmp]; - if (tmp > NUM_ENDPOINTS || (tmp && !ep->desc)) + if (tmp >= NUM_ENDPOINTS || (tmp && !ep->desc)) goto stall; if (tmp) { @@ -1176,7 +1176,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) | USB_REQ_SET_FEATURE: tmp = w_index & USB_ENDPOINT_NUMBER_MASK; ep = &udc->ep[tmp]; - if (w_value != USB_ENDPOINT_HALT || tmp > NUM_ENDPOINTS) + if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) goto stall; if (!ep->desc || ep->is_iso) goto stall; @@ -1195,7 +1195,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) | USB_REQ_CLEAR_FEATURE: tmp = w_index & USB_ENDPOINT_NUMBER_MASK; ep = &udc->ep[tmp]; - if (w_value != USB_ENDPOINT_HALT || tmp > NUM_ENDPOINTS) + if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) goto stall; if (tmp == 0) goto succeed;