From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Date: Fri, 15 May 2020 21:15:30 +0000 (-0500)
Subject: ASoC: codecs: rt*-sdw: fix memory leak in set_sdw_stream()
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=07b542fe831cbefce163ad1b3aa7292c8a6332b8;p=uclinux-h8%2Flinux.git

ASoC: codecs: rt*-sdw: fix memory leak in set_sdw_stream()

Now that the sdw_stream is allocated in machine driver,
set_sdw_stream() is also called with a NULL argument during the
dailink shutdown.

In this case, the drivers should not allocate any memory, and just
return.

Detected with KASAN/kmemleak.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Cc: Oder Chiou <oder_chiou@realtek.com>
Cc: Shuming Fan <shumingf@realtek.com>
Cc: Jack Yu <jack.yu@realtek.com>
Link: https://lore.kernel.org/r/20200515211531.11416-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/sound/soc/codecs/rt1308-sdw.c b/sound/soc/codecs/rt1308-sdw.c
index 4b88fa8efb27..91cc5a15c211 100644
--- a/sound/soc/codecs/rt1308-sdw.c
+++ b/sound/soc/codecs/rt1308-sdw.c
@@ -482,6 +482,9 @@ static int rt1308_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream,
 {
 	struct sdw_stream_data *stream;
 
+	if (!sdw_stream)
+		return 0;
+
 	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 	if (!stream)
 		return -ENOMEM;
diff --git a/sound/soc/codecs/rt5682.c b/sound/soc/codecs/rt5682.c
index 5d3b11756a34..046e6110de73 100644
--- a/sound/soc/codecs/rt5682.c
+++ b/sound/soc/codecs/rt5682.c
@@ -2935,6 +2935,9 @@ static int rt5682_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream,
 {
 	struct sdw_stream_data *stream;
 
+	if (!sdw_stream)
+		return 0;
+
 	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 	if (!stream)
 		return -ENOMEM;
diff --git a/sound/soc/codecs/rt700.c b/sound/soc/codecs/rt700.c
index ff68f0e4f629..687ac2153666 100644
--- a/sound/soc/codecs/rt700.c
+++ b/sound/soc/codecs/rt700.c
@@ -860,6 +860,9 @@ static int rt700_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream,
 {
 	struct sdw_stream_data *stream;
 
+	if (!sdw_stream)
+		return 0;
+
 	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 	if (!stream)
 		return -ENOMEM;
diff --git a/sound/soc/codecs/rt711.c b/sound/soc/codecs/rt711.c
index 2daed7692a3b..65b59dbfb43c 100644
--- a/sound/soc/codecs/rt711.c
+++ b/sound/soc/codecs/rt711.c
@@ -906,6 +906,9 @@ static int rt711_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream,
 {
 	struct sdw_stream_data *stream;
 
+	if (!sdw_stream)
+		return 0;
+
 	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 	if (!stream)
 		return -ENOMEM;
diff --git a/sound/soc/codecs/rt715.c b/sound/soc/codecs/rt715.c
index 2cbc57b16b13..099c8bd20006 100644
--- a/sound/soc/codecs/rt715.c
+++ b/sound/soc/codecs/rt715.c
@@ -530,6 +530,9 @@ static int rt715_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream,
 
 	struct sdw_stream_data *stream;
 
+	if (!sdw_stream)
+		return 0;
+
 	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 	if (!stream)
 		return -ENOMEM;