HID: roccat: fix NULL pointer dereference, add range checks

[firefly-linux-kernel-4.4.55.git] / drivers / hid / hid-roccat-kone.c

diff --git a/drivers/hid/hid-roccat-kone.c b/drivers/hid/hid-roccat-kone.c
index 7e29778fe7ab65ee307ad158f7b7706ba0194b43..2b8f3a31ffb314aa814e560d6fa7c221c9c3035a 100644 (file)
--- a/drivers/hid/hid-roccat-kone.c
+++ b/drivers/hid/hid-roccat-kone.c
@@ -832,6 +832,9 @@ static int kone_raw_event(struct hid_device *hdev, struct hid_report *report,
        if (size != sizeof(struct kone_mouse_event))
                return 0;
 
+       if (kone == NULL)
+               return 0;
+
        /*
         * Firmware 1.38 introduced new behaviour for tilt and special buttons.
         * Pressed button is reported in each movement event.