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Commit b1feb4e5 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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Input: kbtab - validate number of endpoints before using them 



commit cb1b494663e037253337623bf1ef2df727883cb7 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

drivers/input/tablet/kbtab.c

+3 −0
Original line number Diff line number Diff line
@@ -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)