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USB: gadget: validate endpoint index for xilinx udc
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>
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1 changed files with 6 additions and 0 deletions
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@ -1615,6 +1615,8 @@ static void xudc_getstatus(struct xusb_udc *udc)
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break;
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case USB_RECIP_ENDPOINT:
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epnum = udc->setup.wIndex & USB_ENDPOINT_NUMBER_MASK;
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if (epnum >= XUSB_MAX_ENDPOINTS)
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goto stall;
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target_ep = &udc->ep[epnum];
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epcfgreg = udc->read_fn(udc->addr + target_ep->offset);
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halt = epcfgreg & XUSB_EP_CFG_STALL_MASK;
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@ -1682,6 +1684,10 @@ static void xudc_set_clear_feature(struct xusb_udc *udc)
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case USB_RECIP_ENDPOINT:
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if (!udc->setup.wValue) {
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endpoint = udc->setup.wIndex & USB_ENDPOINT_NUMBER_MASK;
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if (endpoint >= XUSB_MAX_ENDPOINTS) {
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xudc_ep0_stall(udc);
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return;
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}
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target_ep = &udc->ep[endpoint];
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outinbit = udc->setup.wIndex & USB_ENDPOINT_DIR_MASK;
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outinbit = outinbit >> 7;
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