[PATCH 4.4 42/78] Input: iforce - add sanity checks

[Greg Kroah-Hartman]

From: Oliver Neukum <oneu...@suse.com>

commit 849f5ae3a513c550cad741c68dd3d7eb2bcc2a2c upstream.

The endpoint type should also be checked before a device
is accepted.

Reported-by: syzbot+5efc10c005014d061...@syzkaller.appspotmail.com
Signed-off-by: Oliver Neukum <oneu...@suse.com>
Signed-off-by: Dmitry Torokhov <dmitry.torok...@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/input/joystick/iforce/iforce-usb.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/input/joystick/iforce/iforce-usb.c
+++ b/drivers/input/joystick/iforce/iforce-usb.c
@@ -145,7 +145,12 @@ static int iforce_usb_probe(struct usb_i
                return -ENODEV;
 
        epirq = &interface->endpoint[0].desc;
+       if (!usb_endpoint_is_int_in(epirq))
+               return -ENODEV;
+
        epout = &interface->endpoint[1].desc;
+       if (!usb_endpoint_is_int_out(epout))
+               return -ENODEV;
 
        if (!(iforce = kzalloc(sizeof(struct iforce) + 32, GFP_KERNEL)))
                goto fail;