We should only see devices with interrupt endpoints. Ignore any other
endpoints that we find, so we don't send try to send them interrupt URBs
and trigger a WARN down in the USB stack.
Reported-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Tested-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # c01b5e7464f0 Input: xpad - don't depend on endpoint order
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Cameron Gutman <aicommander@xxxxxxxxx>
---
To be able to hit any of the LTS kernels, we'll need to also cherry pick
c01b5e7464f0 ("Input: xpad - don't depend on endpoint order"). In hindsight,
this commit also addresses a malicious USB device case, since a device could
purposefully trick us into sending URBs to an endpoint in the wrong direction.
---
drivers/input/joystick/xpad.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index f8e34ef643c7..d86e59515b9c 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -1764,10 +1764,12 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id
struct usb_endpoint_descriptor *ep =
&intf->cur_altsetting->endpoint[i].desc;
- if (usb_endpoint_dir_in(ep))
- ep_irq_in = ep;
- else
- ep_irq_out = ep;
+ if (usb_endpoint_xfer_int(ep)) {
+ if (usb_endpoint_dir_in(ep))
+ ep_irq_in = ep;
+ else
+ ep_irq_out = ep;
+ }
}
if (!ep_irq_in || !ep_irq_out) {
--
2.14.1
--
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