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| author | Ian Abbott <abbotti@mev.co.uk> | 2017-03-08 16:03:00 +0000 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2017-03-13 16:55:41 +0100 |
| commit | d0559a2f294c9b50d7795a8362931f0db8953de1 (patch) | |
| tree | 0c3943246b8cd960371318dcf2bb9130a06feae0 /drivers/usb/serial/ftdi_sio.c | |
| parent | db9240662a44e1b7781c8dbf35631bcec7a369c6 (diff) | |
| download | linux-d0559a2f294c9b50d7795a8362931f0db8953de1.tar.gz linux-d0559a2f294c9b50d7795a8362931f0db8953de1.tar.bz2 linux-d0559a2f294c9b50d7795a8362931f0db8953de1.zip | |
USB: serial: ftdi_sio: only allow valid event_char values
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 -EINVAL for out-of-range values. Use kstrtouint() to
parse the integer instead of the obsolete simple_strtoul().
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb/serial/ftdi_sio.c')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index b774f9d32d4f..4032a675643c 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -1738,9 +1738,12 @@ static ssize_t store_event_char(struct device *dev, struct usb_serial_port *port = to_usb_serial_port(dev); struct ftdi_private *priv = usb_get_serial_port_data(port); struct usb_device *udev = port->serial->dev; - int v = simple_strtoul(valbuf, NULL, 10); + unsigned int v; int rv; + if (kstrtouint(valbuf, 10, &v) || v >= 0x200) + return -EINVAL; + dev_dbg(&port->dev, "%s: setting event char = %i\n", __func__, v); rv = usb_control_msg(udev, |