sound: sgio2audio/pdaudiocf/usb-audio: initialize PCM buffer

When allocating the PCM buffer, use vmalloc_user() instead of vmalloc().
Otherwise, it would be possible for applications to play the previous
contents of the kernel memory to the speakers, or to read it directly if
the buffer is exported to userspace.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: <stable@kernel.org>

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/sound/mips/sgio2audio.c b/sound/mips/sgio2audio.c
index 8691f4cf6191..f1d9d16b5486 100644
--- a/sound/mips/sgio2audio.c
+++ b/sound/mips/sgio2audio.c
@@ -609,7 +609,7 @@ static int snd_sgio2audio_pcm_hw_params(struct snd_pcm_substream *substream,
         /* alloc virtual 'dma' area */
         if (runtime->dma_area)
                 vfree(runtime->dma_area);
-        runtime->dma_area = vmalloc(size);
+        runtime->dma_area = vmalloc_user(size);
         if (runtime->dma_area == NULL)
                 return -ENOMEM;
         runtime->dma_bytes = size;