3.6-stable review patch. If anyone has any objections, please let me know.
------------------ From: Alan Stern <[email protected]> commit db5c8b524444d4fc6b1f32d368a50a3729e50002 upstream. This patch (as1615) fixes a bug in the Garmin USB serial driver. It uses attach, disconnect, and release routines to carry out actions that should be handled by port_probe and port_remove routines, because they access port-specific data. The bug causes an oops when the device in unplugged, because the private data for each port structure now gets erased when the port is unbound from the driver, resulting in a null-pointer dereference. Signed-off-by: Alan Stern <[email protected]> Reported--by: Markus Schauler <[email protected]> Tested-by: Markus Schauler <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/usb/serial/garmin_gps.c | 24 +++++++----------------- 1 file changed, 7 insertions(+), 17 deletions(-) --- a/drivers/usb/serial/garmin_gps.c +++ b/drivers/usb/serial/garmin_gps.c @@ -1414,11 +1414,10 @@ static void timeout_handler(unsigned lon -static int garmin_attach(struct usb_serial *serial) +static int garmin_port_probe(struct usb_serial_port *port) { - int status = 0; - struct usb_serial_port *port = serial->port[0]; - struct garmin_data *garmin_data_p = NULL; + int status; + struct garmin_data *garmin_data_p; garmin_data_p = kzalloc(sizeof(struct garmin_data), GFP_KERNEL); if (garmin_data_p == NULL) { @@ -1443,22 +1442,14 @@ static int garmin_attach(struct usb_seri } -static void garmin_disconnect(struct usb_serial *serial) +static int garmin_port_remove(struct usb_serial_port *port) { - struct usb_serial_port *port = serial->port[0]; struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); usb_kill_urb(port->interrupt_in_urb); del_timer_sync(&garmin_data_p->timer); -} - - -static void garmin_release(struct usb_serial *serial) -{ - struct usb_serial_port *port = serial->port[0]; - struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); - kfree(garmin_data_p); + return 0; } @@ -1475,9 +1466,8 @@ static struct usb_serial_driver garmin_d .close = garmin_close, .throttle = garmin_throttle, .unthrottle = garmin_unthrottle, - .attach = garmin_attach, - .disconnect = garmin_disconnect, - .release = garmin_release, + .port_probe = garmin_port_probe, + .port_remove = garmin_port_remove, .write = garmin_write, .write_room = garmin_write_room, .write_bulk_callback = garmin_write_bulk_callback, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
