After calling of_node_put() on the codec_ep and codec_port variables, they are still being used, which may result in use-after-free. We fix this issue by calling of_node_put() after the last usage.
Fixes: fce9b90c1ab7 ("ASoC: audio-graph-card: cleanup DAI link loop method - step2") Signed-off-by: Wen Yang wen.yang99@zte.com.cn Cc: Liam Girdwood lgirdwood@gmail.com Cc: Mark Brown broonie@kernel.org Cc: Jaroslav Kysela perex@perex.cz Cc: Takashi Iwai tiwai@suse.com Cc: Kuninori Morimoto kuninori.morimoto.gx@renesas.com Cc: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org --- sound/soc/generic/audio-graph-card.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c index e438011..30a4e83 100644 --- a/sound/soc/generic/audio-graph-card.c +++ b/sound/soc/generic/audio-graph-card.c @@ -421,9 +421,6 @@ static int graph_for_each_link(struct asoc_simple_priv *priv, codec_ep = of_graph_get_remote_endpoint(cpu_ep); codec_port = of_get_parent(codec_ep);
- of_node_put(codec_ep); - of_node_put(codec_port); - /* get convert-xxx property */ memset(&adata, 0, sizeof(adata)); graph_parse_convert(dev, codec_ep, &adata); @@ -443,6 +440,9 @@ static int graph_for_each_link(struct asoc_simple_priv *priv, else ret = func_noml(priv, cpu_ep, codec_ep, li);
+ of_node_put(codec_ep); + of_node_put(codec_port); + if (ret < 0) return ret;