From: Greg Kroah-Hartman gregkh@linuxfoundation.org
From: Yorick de Wid ydewid@gmail.com
commit 4d8654e81db7346f915eca9f1aff18f385cab621 upstream.
The CDC ACM driver is false matching the Goodix Fingerprint device against the USB_CDC_ACM_PROTO_AT_V25TER.
The Goodix Fingerprint device is a biometrics sensor that should be handled in user-space. libfprint has some support for Goodix fingerprint sensors, although not for this particular one. It is possible that the vendor allocates a PID per OEM (Lenovo, Dell etc). If this happens to be the case then more devices from the same vendor could potentially match the ACM modem module table.
Signed-off-by: Yorick de Wid ydewid@gmail.com Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/20210213144901.53199-1-ydewid@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/class/cdc-acm.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1941,6 +1941,11 @@ static const struct usb_device_id acm_id .driver_info = SEND_ZERO_PACKET, },
+ /* Exclude Goodix Fingerprint Reader */ + { USB_DEVICE(0x27c6, 0x5395), + .driver_info = IGNORE_DEVICE, + }, + /* control interfaces without any protocol set */ { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, USB_CDC_PROTO_NONE) },