Re: [PATCH 2/2] ASoC: samsung: odroid: fix a double-free issue for cpu_dai

[Krzysztof Kozlowski]

On Sat, 13 Jul 2019 at 05:48, Wen Yang <wen.yang99@xxxxxxxxxx> wrote:
>
> The cpu_dai variable is still being used after the of_node_put() call,
> which may result in double-free:
>
>         of_node_put(cpu_dai);            ---> released here
>
>         ret = devm_snd_soc_register_card(dev, card);
>         if (ret < 0) {
> ...
>                 goto err_put_clk_i2s;    --> jump to err_put_clk_i2s
> ...
>
> err_put_clk_i2s:
>         clk_put(priv->clk_i2s_bus);
> err_put_sclk:
>         clk_put(priv->sclk_i2s);
> err_put_cpu_dai:
>         of_node_put(cpu_dai);            --> double-free here
>
> Fixes: d832d2b246c5 ("ASoC: samsung: odroid: Fix of_node refcount unbalance")
> Signed-off-by: Wen Yang <wen.yang99@xxxxxxxxxx>
> Cc: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
> Cc: Sangbeom Kim <sbkim73@xxxxxxxxxxx>
> Cc: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> Cc: Liam Girdwood <lgirdwood@xxxxxxxxx>
> Cc: Mark Brown <broonie@xxxxxxxxxx>
> Cc: Jaroslav Kysela <perex@xxxxxxxx>
> Cc: Takashi Iwai <tiwai@xxxxxxxx>
> Cc: alsa-devel@xxxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> ---
>  sound/soc/samsung/odroid.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>

Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>

Best regards,
Krzysztof