> diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
> index a82b399..1ce1362 100644
> --- a/drivers/tty/pty.c
> +++ b/drivers/tty/pty.c
> @@ -116,6 +116,8 @@ static int pty_space(struct tty_struct *to)
>
> static int pty_write(struct tty_struct *tty, const unsigned char *buf, int c)
> {
> + if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
> + return -EIO;
The flag can change between the test and ny further code being executed ?
Alan
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