Port unplug can race with close() in port_fops_release(). port_fops_release() already takes the necessary locks, ensure unplug_port() does that too.
CC: <[email protected]> Signed-off-by: Amit Shah <[email protected]> --- drivers/char/virtio_console.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index c9faea1..bdfb814 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1545,6 +1545,7 @@ static void unplug_port(struct port *port) list_del(&port->list); spin_unlock_irq(&port->portdev->ports_lock); + spin_lock_irq(&port->inbuf_lock); if (port->guest_connected) { /* Let the app know the port is going down. */ send_sigio_to_port(port); @@ -1555,6 +1556,7 @@ static void unplug_port(struct port *port) wake_up_interruptible(&port->waitqueue); } + spin_unlock_irq(&port->inbuf_lock); if (is_console_port(port)) { spin_lock_irq(&pdrvdata_lock); -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
