Commit b1feb4e5 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman

Input: kbtab - validate number of endpoints before using them

commit cb1b4946 upstream.

Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 83d920e4
......@@ -122,6 +122,9 @@ static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *i
struct input_dev *input_dev;
int error = -ENOMEM;
if (intf->cur_altsetting->desc.bNumEndpoints < 1)
return -ENODEV;
kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL);
input_dev = input_allocate_device();
if (!kbtab || !input_dev)
......
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