This prevents a malicious USB device from causing an oops.
Signed-off-by: Cameron Gutman <aicommander@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
drivers/input/joystick/xpad.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index 3438e98..a529a45 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -1431,6 +1431,9 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id
int ep_irq_in_idx;
int i, error;
+ if (intf->cur_altsetting->desc.bNumEndpoints != 2)
+ return -ENODEV;
+
for (i = 0; xpad_device[i].idVendor; i++) {
if ((le16_to_cpu(udev->descriptor.idVendor) == xpad_device[i].idVendor) &&
(le16_to_cpu(udev->descriptor.idProduct) == xpad_device[i].idProduct))
--
2.7.4
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