From: Oliver Neukum oneukum@suse.com
commit c88090dfc84254fa149174eb3e6a8458de1912c4 upstream.
The driver should check whether the endpoint it uses has the correct type.
Reported-by: syzbot+c7df50363aaff50aa363@syzkaller.appspotmail.com Signed-off-by: Oliver Neukum oneukum@suse.com Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/input/tablet/kbtab.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/input/tablet/kbtab.c +++ b/drivers/input/tablet/kbtab.c @@ -125,6 +125,10 @@ static int kbtab_probe(struct usb_interf if (intf->cur_altsetting->desc.bNumEndpoints < 1) return -ENODEV;
+ endpoint = &intf->cur_altsetting->endpoint[0].desc; + if (!usb_endpoint_is_int_in(endpoint)) + return -ENODEV; + kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL); input_dev = input_allocate_device(); if (!kbtab || !input_dev) @@ -163,8 +167,6 @@ static int kbtab_probe(struct usb_interf input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0); input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
- endpoint = &intf->cur_altsetting->endpoint[0].desc; - usb_fill_int_urb(kbtab->irq, dev, usb_rcvintpipe(dev, endpoint->bEndpointAddress), kbtab->data, 8,