ALSA: compress: info leak in snd_compr_get_caps()

If the ->get_caps() function doesn't clear the buffer then there would
stack information leaked to userspace.  For example,
soc_compr_get_caps() can return success without clearing the buffer.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
index 7941ace78283..664c69398b41 100644
--- a/sound/core/compress_offload.c
+++ b/sound/core/compress_offload.c
@@ -409,6 +409,7 @@ snd_compr_get_caps(struct snd_compr_stream *stream, unsigned long arg)
         if (!stream->ops->get_caps)
                 return -ENXIO;
 
+        memset(&caps, 0, sizeof(caps));
         retval = stream->ops->get_caps(stream, &caps);
         if (retval)
                 goto out;