On Mon, Apr 24, 2017 at 09:18:39PM +0200, Andreas Kemnade wrote: > keep tty driver until usb driver is unregistered > rmmod hso > produces traces like this without that:
Yeah, a blatant use-after-free. > Signed-off-by: Andreas Kemnade <andr...@kemnade.info> Reviewed-by: Johan Hovold <jo...@kernel.org> > --- > drivers/net/usb/hso.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c > index 2e66340..b75e23f 100644 > --- a/drivers/net/usb/hso.c > +++ b/drivers/net/usb/hso.c > @@ -3293,9 +3293,9 @@ static void __exit hso_exit(void) > pr_info("unloaded\n"); > > tty_unregister_driver(tty_drv); > - put_tty_driver(tty_drv); > /* deregister the usb driver */ > usb_deregister(&hso_driver); > + put_tty_driver(tty_drv); > } > > /* Module definitions */ Thanks, Johan