[alsa-devel] memory leak in mix/pcm_upmix.c mix/pcm_downmix.c!!!

[boozer asm]

eg.
in function:SND_PCM_PLUGIN_DEFINE_FUNC(upmix)
487     mix = calloc(1, sizeof(*mix));
488     if (mix == NULL)
489         return -ENOMEM;

mix is allocated here. but at close function, it is not freed, and no
__destructor function available to free it.

and in alsa-lib/src/pcm/pcm_extplug.c
static int snd_pcm_extplug_close(snd_pcm_t *pcm)
{
    extplug_priv_t *ext = pcm->private_data;

    snd_pcm_close(ext->plug.gen.slave);
    clear_ext_params(ext);
    if (ext->data->callback->close)
    {
        ext->data->callback->close(ext->data);
    }
    free(ext);
    return 0;
}
this function does NOT free ext->data.
and
366 static int upmix_close(snd_pcm_extplug_t *ext)
367 {
368     snd_pcm_upmix_t *mix = (snd_pcm_upmix_t *)ext;
369     free(mix->delayline[0]);
370     free(mix->delayline[1]);
371     return 0;
372 }

and this function does NOT free mix itself.

so I think there is memory leak.