From 16dcefc23eefda57ee705dcffba67f1bd42c01bc Mon Sep 17 00:00:00 2001 From: Cezary Rojewski Date: Thu, 12 Mar 2020 13:00:58 +0100 Subject: [PATCH] ASoC: SOF: Intel: Fix stream cleanup on hw free Field "substream" gets assigned during stream setup in hda_dsp_pcm_hw_params() but it is never cleared afterwards during cleanup procedure. Now, any non-pcm operation e.g.: compress can mistakenly make use of that pointer as it's bypassing all "if (s->substream)" checks. Nulling the pointer during hw_free operation ensures no wild pointers are left behind. Fixes: cdae3b9a47aa ("ASoC: SOF: Intel: Add Intel specific HDA PCM operations") Signed-off-by: Cezary Rojewski Acked-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20200312120058.15057-1-cezary.rojewski@intel.com Signed-off-by: Mark Brown --- sound/soc/sof/intel/hda-stream.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c index c0ab9bb..d2234f8 100644 --- a/sound/soc/sof/intel/hda-stream.c +++ b/sound/soc/sof/intel/hda-stream.c @@ -547,6 +547,8 @@ int hda_dsp_stream_hw_free(struct snd_sof_dev *sdev, SOF_HDA_REG_PP_PPCTL, mask, 0); spin_unlock_irq(&bus->reg_lock); + stream->substream = NULL; + return 0; } -- 2.7.4