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| author | Qais Yousef <qais.yousef@imgtec.com> | 2015-01-14 08:47:29 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-05 22:35:48 -0800 |
| commit | f48df470bc8d9f106d1833f36a3f8944d3588346 (patch) | |
| tree | dcac5b7ee21a198295b7910ce0ad870c528a3aaf /sound/soc | |
| parent | f1251f53c8da53443b33eefce82772176be9452a (diff) | |
| download | lwn-f48df470bc8d9f106d1833f36a3f8944d3588346.tar.gz lwn-f48df470bc8d9f106d1833f36a3f8944d3588346.zip | |
ASoC: soc-compress.c: fix NULL dereference
commit d3268a40d4b19ff7bee23f52eabbc4e96bb685e8 upstream.
In soc_new_compress() when rtd->dai_link->dynamic is set, we create the pcm
substreams with this call:
ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
1, 0, &be_pcm);
which passes 0 as capture_count leading to
be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream
being NULL, hence when trying to set rtd a few lines below we get an oops.
Fix by using rtd->dai_link->dpcm_playback and rtd->dai_link->dpcm_capture as
playback_count and capture_count to snd_pcm_new_internal().
Signed-off-by: Qais Yousef <qais.yousef@imgtec.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/soc-compress.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c index 5e9690c85d8f..4f98ff14cf12 100644 --- a/sound/soc/soc-compress.c +++ b/sound/soc/soc-compress.c @@ -696,7 +696,8 @@ int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num) rtd->dai_link->stream_name); ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, - 1, 0, &be_pcm); + rtd->dai_link->dpcm_playback, + rtd->dai_link->dpcm_capture, &be_pcm); if (ret < 0) { dev_err(rtd->card->dev, "ASoC: can't create compressed for %s\n", rtd->dai_link->name); @@ -705,8 +706,10 @@ int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num) rtd->pcm = be_pcm; rtd->fe_compr = 1; - be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; - be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; + if (rtd->dai_link->dpcm_playback) + be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; + else if (rtd->dai_link->dpcm_capture) + be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops)); } else memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops)); |