Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.18 0878/1095] ASoC: SOF: ipc3-topology: Prevent double freeing of ipc_control_data via load_bytes | Date | Mon, 15 Aug 2022 20:04:37 +0200 |
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From: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
[ Upstream commit d5bd47f3ca124058a8e87eae4508afeda2132611 ]
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 <seppo.ingalsuo@linux.intel.com> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20220712130103.31514-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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 80fb82ece38d..74c230fbcf68 100644 --- a/sound/soc/sof/ipc3-topology.c +++ b/sound/soc/sof/ipc3-topology.c @@ -1629,6 +1629,7 @@ 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; } -- 2.35.1
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