HID: u2fzero: fail probe if not using USB transport

u2fzero driver is USB-only. Therefore we have to give up in ->probe()
callback in case we're called with non-USB transport driver bound,
otherwise the kernel will crash trying to use USBHID API on a non-USB
transport.

Fixes: 42337b9d4d958("HID: add driver for U2F Zero built-in LED and RNG")
Reported-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-u2fzero.c b/drivers/hid/hid-u2fzero.c
index d11a5cb..95e0807 100644 (file)
--- a/drivers/hid/hid-u2fzero.c
+++ b/drivers/hid/hid-u2fzero.c
@@ -286,6 +286,9 @@ static int u2fzero_probe(struct hid_device *hdev,
        unsigned int minor;
        int ret;
 
+       if (!hid_is_using_ll_driver(hdev, &usb_hid_driver))
+               return -EINVAL;
+
        dev = devm_kzalloc(&hdev->dev, sizeof(*dev), GFP_KERNEL);
        if (dev == NULL)
                return -ENOMEM;