Re: [PATCH v1] drivers/tty/serial: check the return value of uart_port_check()

[Greg KH]

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?

> Check its return value
> before dereference it.

How do you trigger this issue, and how was this change you made tested?

thanks,

greg k-h