ALSA: dummy: Fix a use-after-free at closing

[firefly-linux-kernel-4.4.55.git] / sound / drivers / dummy.c

diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c
index a9f7a75702d20bb0a21e97c60ad9fe1fad31dcee..67628616506e86aa66defa36e580bd1146e7c549 100644 (file)
--- a/sound/drivers/dummy.c
+++ b/sound/drivers/dummy.c
@@ -420,6 +420,7 @@ static int dummy_hrtimer_stop(struct snd_pcm_substream *substream)
 
 static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm)
 {
+       hrtimer_cancel(&dpcm->timer);
        tasklet_kill(&dpcm->tasklet);
 }