Commit 2c251e56 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman

uwb: hwa-rc: fix NULL-deref at probe

commit daf229b1 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: de520b8b ("uwb: add HWA radio controller driver")
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: David Vrabel <david.vrabel@csr.com>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 815321da
...@@ -825,6 +825,9 @@ static int hwarc_probe(struct usb_interface *iface, ...@@ -825,6 +825,9 @@ static int hwarc_probe(struct usb_interface *iface,
struct hwarc *hwarc; struct hwarc *hwarc;
struct device *dev = &iface->dev; struct device *dev = &iface->dev;
if (iface->cur_altsetting->desc.bNumEndpoints < 1)
return -ENODEV;
result = -ENOMEM; result = -ENOMEM;
uwb_rc = uwb_rc_alloc(); uwb_rc = uwb_rc_alloc();
if (uwb_rc == NULL) { if (uwb_rc == NULL) {
......
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