3.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Johan Hovold <[email protected]> commit daf229b15907fbfdb6ee183aac8ca428cb57e361 upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Note that the dereference happens in the start callback which is called during probe. Fixes: de520b8bd552 ("uwb: add HWA radio controller driver") Cc: Inaky Perez-Gonzalez <[email protected]> Cc: David Vrabel <[email protected]> Signed-off-by: Johan Hovold <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/uwb/hwa-rc.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/uwb/hwa-rc.c +++ b/drivers/uwb/hwa-rc.c @@ -825,6 +825,9 @@ static int hwarc_probe(struct usb_interf struct hwarc *hwarc; struct device *dev = &iface->dev; + if (iface->cur_altsetting->desc.bNumEndpoints < 1) + return -ENODEV; + result = -ENOMEM; uwb_rc = uwb_rc_alloc(); if (uwb_rc == NULL) {
