[PATCH] ASoC: cpcap: Check for NULL pointer after calling of_get_child_by_name
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 --- sound/soc/codecs/cpcap.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/sound/soc/codecs/cpcap.c b/sound/soc/codecs/cpcap.c index 05bbacd0d174..f1c13f42e1c1 100644 --- a/sound/soc/codecs/cpcap.c +++ b/sound/soc/codecs/cpcap.c @@ -1667,6 +1667,8 @@ static int cpcap_codec_probe(struct platform_device *pdev) { 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;
On Tue, 11 Jan 2022 10:50:48 +0800, Jiasheng Jiang wrote:
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.
[...]
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-linus
Thanks!
[1/1] ASoC: cpcap: Check for NULL pointer after calling of_get_child_by_name commit: f7a6021aaf02088870559f82fc13c58cda7fea1a
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
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Thanks, Mark
participants (2)
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Jiasheng Jiang -
Mark Brown