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authorSameer Pujar <spujar@nvidia.com>2020-01-19 19:49:23 +0530
committerMark Brown <broonie@kernel.org>2020-01-21 17:01:11 +0000
commitaf4bac11531fbc0b5955fdccbe3f5ea265cd7374 (patch)
treebd070c6479e409bbe9b639dacba23e1c1a95baf3
parenta6947c9d86bcfd61b758b5693eba58defe7fd2ae (diff)
downloadlinux-af4bac11531fbc0b5955fdccbe3f5ea265cd7374.tar.bz2
ASoC: soc-pcm: crash in snd_soc_dapm_new_dai
Crash happens in snd_soc_dapm_new_dai() when substream->private_data access is made and substream is NULL here. This is seen for DAIs where only playback or capture stream is defined. This seems to be happening for codec2codec DAI link. Both playback and capture are 0 during soc_new_pcm(). This is probably happening because cpu_dai and codec_dai are both validated either for SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE. Shouldn't be playback = 1 when, - playback stream is available for codec_dai AND - capture stream is available for cpu_dai and vice-versa for capture = 1? Signed-off-by: Sameer Pujar <spujar@nvidia.com> Link: https://lore.kernel.org/r/1579443563-12287-1-git-send-email-spujar@nvidia.com Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--sound/soc/soc-pcm.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index b78f6ff2b1d3..f70bec7815ee 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -2916,10 +2916,10 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
- snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
+ snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
playback = 1;
if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
- snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
+ snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
capture = 1;
}