From: Jiasheng Jiang jiasheng@iscas.ac.cn
commit f7a6021aaf02088870559f82fc13c58cda7fea1a upstream.
If the device does not exist, of_get_child_by_name() will return NULL pointer. And devm_snd_soc_register_component() does not check it. Also, I have noticed that cpcap_codec_driver has not been used yet. Therefore, it should be better to check it in order to avoid the future dereference of the NULL pointer.
Fixes: f6cdf2d3445d ("ASoC: cpcap: new codec") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn Link: https://lore.kernel.org/r/20220111025048.524134-1-jiasheng@iscas.ac.cn Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/soc/codecs/cpcap.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/sound/soc/codecs/cpcap.c +++ b/sound/soc/codecs/cpcap.c @@ -1544,6 +1544,8 @@ static int cpcap_codec_probe(struct plat { struct device_node *codec_node = of_get_child_by_name(pdev->dev.parent->of_node, "audio-codec"); + if (!codec_node) + return -ENODEV;
pdev->dev.of_node = codec_node;