The "event_char" device attribute value, when written, is interpreted as an enable bit in bit 8, and an "event character" in bits 7 to 0. Return an error for out-of-range values. Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx> --- drivers/usb/serial/ftdi_sio.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 2da99875cecb..2662fc3b49c5 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -1738,6 +1738,9 @@ static ssize_t store_event_char(struct device *dev, int v = simple_strtoul(valbuf, NULL, 10); int rv; + if (v < 0 || v >= 0x200) + return -EINVAL; + dev_dbg(&port->dev, "%s: setting event char = %i\n", __func__, v); rv = usb_control_msg(udev, -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
