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Subject: media: rc: oops in ir_timer_keyup after device unplug Author: Sean Young sean@mess.org Date: Tue Mar 6 08:57:57 2018 -0500

If there is IR in the raw kfifo when ir_raw_event_unregister() is called, then kthread_stop() causes ir_raw_event_thread to be scheduled, decode some scancodes and re-arm timer_keyup. The timer_keyup then fires when the rc device is long gone.

Cc: stable@vger.kernel.org Signed-off-by: Sean Young sean@mess.org Signed-off-by: Mauro Carvalho Chehab mchehab@s-opensource.com

drivers/media/rc/rc-main.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

---

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c index 4a952108ba1e..8621761a680f 100644 --- a/drivers/media/rc/rc-main.c +++ b/drivers/media/rc/rc-main.c @@ -1932,12 +1932,12 @@ void rc_unregister_device(struct rc_dev *dev) if (!dev) return;

- del_timer_sync(&dev->timer_keyup); - del_timer_sync(&dev->timer_repeat); - if (dev->driver_type == RC_DRIVER_IR_RAW) ir_raw_event_unregister(dev);

+ del_timer_sync(&dev->timer_keyup); + del_timer_sync(&dev->timer_repeat); + rc_free_rx_device(dev);

mutex_lock(&dev->lock);