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ASoC: SOF: Intel: hda: Fix NULL pointer dereference #5650

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ASoC: SOF: Intel: hda: Fix NULL pointer dereference #5650

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14 changes: 12 additions & 2 deletions sound/soc/sof/intel/hda-dai.c
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Original file line number Diff line number Diff line change
Expand Up @@ -70,12 +70,22 @@ static const struct hda_dai_widget_dma_ops *
hda_dai_get_ops(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai)
{
struct snd_soc_dapm_widget *w = snd_soc_dai_get_widget(cpu_dai, substream->stream);
struct snd_sof_widget *swidget = w->dobj.private;
struct snd_sof_widget *swidget;
struct snd_sof_dev *sdev;
struct snd_sof_dai *sdai;

sdev = widget_to_sdev(w);
/*
* this is unlikely if the topology and the machine driver DAI links match.
* But if there's a missing DAI link in topology, this will prevent a NULL pointer
* dereference later on.
*/
if (!w) {
dev_err(cpu_dai->dev, "%s: widget is NULL\n", __func__);
return NULL;
}

sdev = widget_to_sdev(w);
swidget = w->dobj.private;
if (!swidget) {
dev_err(sdev->dev, "%s: swidget is NULL\n", __func__);
return NULL;
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