From d5bd47f3ca124058a8e87eae4508afeda2132611 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Tue, 12 Jul 2022 16:01:03 +0300 Subject: [PATCH] ASoC: SOF: ipc3-topology: Prevent double freeing of ipc_control_data via load_bytes We have sanity checks for byte controls and if any of the fail the locally allocated scontrol->ipc_control_data is freed up, but not set to NULL. On a rollback path of the error the higher level code will also try to free the scontrol->ipc_control_data which will eventually going to lead to memory corruption as double freeing memory is not a good thing. Fixes: b5cee8feb1d4 ("ASoC: SOF: topology: Make control parsing IPC agnostic") Reported-by: Seppo Ingalsuo Signed-off-by: Peter Ujfalusi Reviewed-by: Seppo Ingalsuo Reviewed-by: Ranjani Sridharan Reviewed-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20220712130103.31514-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown --- 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 9448d5338423..b2cc046b9f60 100644 --- a/sound/soc/sof/ipc3-topology.c +++ b/sound/soc/sof/ipc3-topology.c @@ -1644,6 +1644,7 @@ static int sof_ipc3_control_load_bytes(struct snd_sof_dev *sdev, struct snd_sof_ return 0; err: kfree(scontrol->ipc_control_data); + scontrol->ipc_control_data = NULL; return ret; }