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-rw-r--r--sound/core/pcm_native.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 5a1245509eac..c375c41496f8 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -740,6 +740,10 @@ static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
runtime->boundary *= 2;
+ /* clear the buffer for avoiding possible kernel info leaks */
+ if (runtime->dma_area && !substream->ops->copy_user)
+ memset(runtime->dma_area, 0, runtime->dma_bytes);
+
snd_pcm_timer_resolution_change(substream);
snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);