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authorGuennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>2020-01-24 15:36:19 -0600
committerMark Brown <broonie@kernel.org>2020-01-27 17:51:49 +0000
commit4f7f9564a8937f38f97e8624cb7d6a28ee35f7cb (patch)
treed5a79d696cebb2759b3df053286be441310c9555 /sound
parent90b141614a4133ffeb1075049a49c702f98e26df (diff)
ASoC: SOF: fix an Oops, caused by invalid topology
It is possible to create invalid topology that will cause a kernel Oops when trying to allocate buffers for a NULL substream. Specifically such an Oops was caused by a topology, where a DAI on a capture pipeline was referencing the PCM ID from a playback pipeline. Fix the Oops by explicitly checking for NULL. Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20200124213625.30186-2-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/sof/pcm.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c
index 314f3095c12f..29435ba2d329 100644
--- a/sound/soc/sof/pcm.c
+++ b/sound/soc/sof/pcm.c
@@ -591,6 +591,11 @@ static int sof_pcm_new(struct snd_soc_component *component,
"spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",
caps->name, caps->buffer_size_min, caps->buffer_size_max);
+ if (!pcm->streams[stream].substream) {
+ dev_err(component->dev, "error: NULL playback substream!\n");
+ return -EINVAL;
+ }
+
snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
le32_to_cpu(caps->buffer_size_min),
@@ -609,6 +614,11 @@ capture:
"spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",
caps->name, caps->buffer_size_min, caps->buffer_size_max);
+ if (!pcm->streams[stream].substream) {
+ dev_err(component->dev, "error: NULL capture substream!\n");
+ return -EINVAL;
+ }
+
snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
le32_to_cpu(caps->buffer_size_min),