From: Mengdong Lin mengdong.lin@linux.intel.com
Check if the name strings are properly terminated, and only use valid name strings to find existing physical DAI links to configure.
Signed-off-by: Mengdong Lin mengdong.lin@linux.intel.com
diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c index 8772fd9..4dfdc65 100644 --- a/sound/soc/soc-topology.c +++ b/sound/soc/soc-topology.c @@ -1994,10 +1994,24 @@ static int soc_tplg_link_config(struct soc_tplg *tplg, { struct snd_soc_dai_link *link; const char *name, *stream_name; + size_t len; int ret;
- name = strlen(cfg->name) ? cfg->name : NULL; - stream_name = strlen(cfg->stream_name) ? cfg->stream_name : NULL; + len = strnlen(cfg->name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN); + if (len == SNDRV_CTL_ELEM_ID_NAME_MAXLEN) + return -EINVAL; + else if (len) + name = cfg->name; + else + name = NULL; + + len = strnlen(cfg->stream_name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN); + if (len == SNDRV_CTL_ELEM_ID_NAME_MAXLEN) + return -EINVAL; + else if (len) + stream_name = cfg->stream_name; + else + stream_name = NULL;
link = snd_soc_find_dai_link(tplg->comp->card, cfg->id, name, stream_name);