On Sat, Dec 10, 2016 at 01:30:36AM +0300, Alexey Khoroshilov wrote: > tty_port_tty_get() might return a tty which is NULL > if the port is not associated with a tty > (e.g. due to close or hangup). > But lpuart_start_rx_dma() dereferences tty without any check.
Are you sure that tty could ever be NULL here? This function is only called in places that seem to have a valid tty, with the maybe exception of the resume call path. Can you audit this a bit better to be sure one way or the other please? thanks, greg k-h
