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

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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>
This commit is contained in:
Pierre-Louis Bossart 2020-05-15 16:15:30 -05:00 committed by Mark Brown
parent b5dff6ec13
commit 07b542fe83
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
5 changed files with 15 additions and 0 deletions
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3
sound/soc/codecs/rt1308-sdw.c
View File

@ -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;

3
sound/soc/codecs/rt5682.c
View File

@ -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;

3
sound/soc/codecs/rt700.c
View File

@ -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;

3
sound/soc/codecs/rt711.c
View File

@ -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;

3
sound/soc/codecs/rt715.c
View File

@ -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;