[alsa-devel] [PATCH] ASoC: codecs: Fix to avoid potential NULL pointer dereferences
Aditya Pakki
pakki001 at umn.edu
Tue Mar 19 02:03:56 CET 2019
Apologies for the incorrect patch.
"match" is dead code and I will send a correct patch again.
On Mon, Mar 18, 2019 at 7:58 PM Aditya Pakki <pakki001 at umn.edu> wrote:
> In sirf_audio_codec_driver_probe, of_match_node may fail and return a
> NULL pointer. The patch avoids a potential NULL pointer dereference.
>
> Signed-off-by: Aditya Pakki <pakki001 at umn.edu>
> ---
> sound/soc/codecs/sirf-audio-codec.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/sound/soc/codecs/sirf-audio-codec.c
> b/sound/soc/codecs/sirf-audio-codec.c
> index e424499a8450..fd2bbd6a3c58 100644
> --- a/sound/soc/codecs/sirf-audio-codec.c
> +++ b/sound/soc/codecs/sirf-audio-codec.c
> @@ -464,6 +464,8 @@ static int sirf_audio_codec_driver_probe(struct
> platform_device *pdev)
> const struct of_device_id *match;
>
> match = of_match_node(sirf_audio_codec_of_match,
> pdev->dev.of_node);
> + if (!match)
> + return -ENXIO;
>
> sirf_audio_codec = devm_kzalloc(&pdev->dev,
> sizeof(struct sirf_audio_codec), GFP_KERNEL);
> --
> 2.17.1
>
>
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