* [PATCH] ASoC: Intel: avs: nau8825: Add null pointer check for snd_soc_card_get_codec_dai()
@ 2025-05-14 14:04 Wentao Liang
2025-05-15 9:23 ` Amadeusz Sławiński
0 siblings, 1 reply; 2+ messages in thread
From: Wentao Liang @ 2025-05-14 14:04 UTC (permalink / raw)
To: cezary.rojewski, liam.r.girdwood, peter.ujfalusi, yung-chuan.liao,
ranjani.sridharan, kai.vehmanen, pierre-louis.bossart, broonie,
perex, tiwai
Cc: kuninori.morimoto.gx, linux-sound, linux-kernel, Wentao Liang,
stable
The function avs_card_suspend_pre() in nau8825 calls the function
snd_soc_card_get_codec_dai(), but does not check its return
value which is a null pointer if the function fails. This can result
in a null pointer dereference. A proper implementation can be found
in acp5x_nau8821_hw_params() and card_suspend_pre().
Add a null pointer check for snd_soc_card_get_codec_dai() to avoid null
pointer dereference when the function fails.
Fixes: 9febcd7a0180 ("ASoC: Intel: avs: nau8825: Refactor jack handling")
Cc: stable@vger.kernel.org # v6.2
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
sound/soc/intel/avs/boards/nau8825.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/sound/soc/intel/avs/boards/nau8825.c b/sound/soc/intel/avs/boards/nau8825.c
index bf902540744c..5baeb95cd5a6 100644
--- a/sound/soc/intel/avs/boards/nau8825.c
+++ b/sound/soc/intel/avs/boards/nau8825.c
@@ -220,6 +220,11 @@ static int avs_card_suspend_pre(struct snd_soc_card *card)
{
struct snd_soc_dai *codec_dai = snd_soc_card_get_codec_dai(card, SKL_NUVOTON_CODEC_DAI);
+ if (!codec_dai) {
+ dev_err(card->dev, "Codec dai not found\n");
+ return -EINVAL;
+ }
+
return snd_soc_component_set_jack(codec_dai->component, NULL, NULL);
}
--
2.42.0.windows.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ASoC: Intel: avs: nau8825: Add null pointer check for snd_soc_card_get_codec_dai()
2025-05-14 14:04 [PATCH] ASoC: Intel: avs: nau8825: Add null pointer check for snd_soc_card_get_codec_dai() Wentao Liang
@ 2025-05-15 9:23 ` Amadeusz Sławiński
0 siblings, 0 replies; 2+ messages in thread
From: Amadeusz Sławiński @ 2025-05-15 9:23 UTC (permalink / raw)
To: Wentao Liang, cezary.rojewski, liam.r.girdwood, peter.ujfalusi,
yung-chuan.liao, ranjani.sridharan, kai.vehmanen,
pierre-louis.bossart, broonie, perex, tiwai
Cc: kuninori.morimoto.gx, linux-sound, linux-kernel, stable
On 2025-05-14 16:04, Wentao Liang wrote:
> The function avs_card_suspend_pre() in nau8825 calls the function
> snd_soc_card_get_codec_dai(), but does not check its return
> value which is a null pointer if the function fails. This can result
> in a null pointer dereference. A proper implementation can be found
> in acp5x_nau8821_hw_params() and card_suspend_pre().
>
> Add a null pointer check for snd_soc_card_get_codec_dai() to avoid null
> pointer dereference when the function fails.
>
> Fixes: 9febcd7a0180 ("ASoC: Intel: avs: nau8825: Refactor jack handling")
> Cc: stable@vger.kernel.org # v6.2
> Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
> ---
> sound/soc/intel/avs/boards/nau8825.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/sound/soc/intel/avs/boards/nau8825.c b/sound/soc/intel/avs/boards/nau8825.c
> index bf902540744c..5baeb95cd5a6 100644
> --- a/sound/soc/intel/avs/boards/nau8825.c
> +++ b/sound/soc/intel/avs/boards/nau8825.c
> @@ -220,6 +220,11 @@ static int avs_card_suspend_pre(struct snd_soc_card *card)
> {
> struct snd_soc_dai *codec_dai = snd_soc_card_get_codec_dai(card, SKL_NUVOTON_CODEC_DAI);
>
> + if (!codec_dai) {
> + dev_err(card->dev, "Codec dai not found\n");
> + return -EINVAL;
> + }
> +
> return snd_soc_component_set_jack(codec_dai->component, NULL, NULL);
> }
>
Same as in other case, where Cezary commented - this is not needed, once
card is loaded codec should exist.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2025-05-14 14:04 [PATCH] ASoC: Intel: avs: nau8825: Add null pointer check for snd_soc_card_get_codec_dai() Wentao Liang
2025-05-15 9:23 ` Amadeusz Sławiński
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