On Mon, Aug 22, 2022 at 11:20 PM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Mon, Aug 22, 2022 at 10:57:39PM -0700, lily wrote: > > uart_port_check() can return NULL pointer. > > It can? How will that happen? > When state->uart_port is NULL, uart_port_check() will return a NULL pointer. This actually is checked in other places like drivers/tty/serial/serial_core.c:762. > > Check its return value before dereference it. > > How do you trigger this issue, and how was this change you made tested? > I detect this issue with a static analysis tool, therefore not dynamically triggered. > thanks, > > greg k-h
