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-rw-r--r--kernel/drivers/input/tablet/gtco.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/kernel/drivers/input/tablet/gtco.c b/kernel/drivers/input/tablet/gtco.c
index 3a7f3a4a4..7c18249d6 100644
--- a/kernel/drivers/input/tablet/gtco.c
+++ b/kernel/drivers/input/tablet/gtco.c
@@ -858,6 +858,14 @@ static int gtco_probe(struct usb_interface *usbinterface,
goto err_free_buf;
}
+ /* Sanity check that a device has an endpoint */
+ if (usbinterface->altsetting[0].desc.bNumEndpoints < 1) {
+ dev_err(&usbinterface->dev,
+ "Invalid number of endpoints\n");
+ error = -EINVAL;
+ goto err_free_urb;
+ }
+
/*
* The endpoint is always altsetting 0, we know this since we know
* this device only has one interrupt endpoint
@@ -879,7 +887,7 @@ static int gtco_probe(struct usb_interface *usbinterface,
* HID report descriptor
*/
if (usb_get_extra_descriptor(usbinterface->cur_altsetting,
- HID_DEVICE_TYPE, &hid_desc) != 0){
+ HID_DEVICE_TYPE, &hid_desc) != 0) {
dev_err(&usbinterface->dev,
"Can't retrieve exta USB descriptor to get hid report descriptor length\n");
error = -EIO;