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BACKPORT: Input: xpad - validate USB endpoint count during probe

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This prevents a malicious USB device from causing an oops.

Change-Id: I47c27541a4c2f0cec354eb83b3013bb825ed6e90
Signed-off-by: Cameron Gutman <aicommander@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Cameron Gutman
2016-06-29 09:51:35 -07:00
parent d240a0a145
commit a07b34771a
1 changed files with 3 additions and 0 deletions
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3
drivers/input/joystick/xpad.c
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@@ -1200,6 +1200,9 @@ 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))