Messages in this thread Patch in this message | | | From | Peter Hurley <> | Subject | [PATCH -next 7/9] pty: Hold ctrl_lock for packet mode updates | Date | Thu, 16 Oct 2014 15:33:28 -0400 |
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Updates to the packet mode enable require holding the ctrl_lock; the serialization prevents corruption of adjacent fields.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com> --- drivers/tty/pty.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index bcec4c7..7a1a538 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -47,7 +47,9 @@ static void pty_close(struct tty_struct *tty, struct file *filp) set_bit(TTY_IO_ERROR, &tty->flags); wake_up_interruptible(&tty->read_wait); wake_up_interruptible(&tty->write_wait); + spin_lock_irq(&tty->ctrl_lock); tty->packet = 0; + spin_unlock_irq(&tty->ctrl_lock); /* Review - krefs on tty_link ?? */ if (!tty->link) return; -- 2.1.1
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