diff options
| author | Wen Yang <wen.yang99@zte.com.cn> | 2019-07-04 16:38:50 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-26 09:10:44 +0200 |
| commit | 5a156f038c7de5fb5d4b2d8299f8fcfbf343f3f4 (patch) | |
| tree | 9b75a9d52f3e3db743c5f79a8ea40ed75ca9ea25 /sound/soc/generic | |
| parent | 0417b0fda7f992b61fd132fec64df4b90b21c494 (diff) | |
| download | linux-stable-5a156f038c7de5fb5d4b2d8299f8fcfbf343f3f4.tar.gz linux-stable-5a156f038c7de5fb5d4b2d8299f8fcfbf343f3f4.tar.bz2 linux-stable-5a156f038c7de5fb5d4b2d8299f8fcfbf343f3f4.zip | |
ASoC: audio-graph-card: fix use-after-free in graph_for_each_link
[ Upstream commit 1bcc1fd64e4dd903f4d868a9e053986e3b102713 ]
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
Link: https://lore.kernel.org/r/1562229530-8121-1-git-send-email-wen.yang99@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'sound/soc/generic')
| -rw-r--r-- | sound/soc/generic/audio-graph-card.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c index ec7e673ba475..70ed28d97d49 100644 --- a/sound/soc/generic/audio-graph-card.c +++ b/sound/soc/generic/audio-graph-card.c @@ -435,9 +435,6 @@ 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); @@ -457,6 +454,9 @@ 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; |