[PATCH 5.4 005/135] ASoC: codec2codec: avoid invalid/double-free of pcm runtime

[Greg Kroah-Hartman]

From: Samuel Holland <samuel@xxxxxxxxxxxx>

commit b6570fdb96edf45bcf71884bd2644bd73d348d1a upstream.

The PCM runtime was freed during PMU in the case that the event hook
encountered an error. However, it is also unconditionally freed during
PMD. Avoid a double-free by dropping the call to kfree in the PMU hook.

Fixes: a72706ed8208 ("ASoC: codec2codec: remove ephemeral variables")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Samuel Holland <samuel@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200213061147.29386-2-samuel@xxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 sound/soc/soc-dapm.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -3888,9 +3888,6 @@ snd_soc_dai_link_event_pre_pmu(struct sn
 	runtime->rate = params_rate(params);
 
 out:
-	if (ret < 0)
-		kfree(runtime);
-
 	kfree(params);
 	return ret;
 }