[PATCH 5.18 281/879] ASoC: SOF: ipc3-topology: Set scontrol->priv to NULL after freeing it

[Greg Kroah-Hartman]

From: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>

[ Upstream commit a403993ce98fb401f696da7c4f374739a7609cff ]

Since the scontrol->priv is freed up during load operation it should be set
to NULL to be safe against double freeing attempt.

Fixes: b5cee8feb1d48 ("ASoC: SOF: topology: Make control parsing IPC agnostic")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220331114757.32551-1-peter.ujfalusi@xxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 sound/soc/sof/ipc3-topology.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/sof/ipc3-topology.c b/sound/soc/sof/ipc3-topology.c
index af1bbd34213c..cdff48c4195f 100644
--- a/sound/soc/sof/ipc3-topology.c
+++ b/sound/soc/sof/ipc3-topology.c
@@ -1605,6 +1605,7 @@ static int sof_ipc3_control_load_bytes(struct snd_sof_dev *sdev, struct snd_sof_
 	if (scontrol->priv_size > 0) {
 		memcpy(cdata->data, scontrol->priv, scontrol->priv_size);
 		kfree(scontrol->priv);
+		scontrol->priv = NULL;
 
 		if (cdata->data->magic != SOF_ABI_MAGIC) {
 			dev_err(sdev->dev, "Wrong ABI magic 0x%08x.\n", cdata->data->magic);
-- 
2.35.1