make KCFLAGS='-fanalyzer' sound/soc/sof/intel/ reports a possible NULL
pointer dereference.
sound/soc/sof/topology.c:1136:21: error: dereference of NULL ‘w’
[CWE-476] [-Werror=analyzer-null-dereference]
1136 | strcmp(w->sname, rtd->dai_link->stream_name))
The code is rather confusing and can be simplified to make static
analysis happy. No functionality change.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
Reviewed-by: Daniel Baluta <daniel.baluta@xxxxxxx>
Reviewed-by: Yaochun Hung <yc.hung@xxxxxxxxxxxx>
---
sound/soc/sof/topology.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c
index 698129dccc7d..3866dd3cba69 100644
--- a/sound/soc/sof/topology.c
+++ b/sound/soc/sof/topology.c
@@ -1117,10 +1117,11 @@ static void sof_disconnect_dai_widget(struct snd_soc_component *scomp,
{
struct snd_soc_card *card = scomp->card;
struct snd_soc_pcm_runtime *rtd;
+ const char *sname = w->sname;
struct snd_soc_dai *cpu_dai;
int i, stream;
- if (!w->sname)
+ if (!sname)
return;
if (w->id == snd_soc_dapm_dai_out)
@@ -1133,7 +1134,7 @@ static void sof_disconnect_dai_widget(struct snd_soc_component *scomp,
list_for_each_entry(rtd, &card->rtd_list, list) {
/* does stream match DAI link ? */
if (!rtd->dai_link->stream_name ||
- strcmp(w->sname, rtd->dai_link->stream_name))
+ strcmp(sname, rtd->dai_link->stream_name))
continue;
for_each_rtd_cpu_dais(rtd, i, cpu_dai)
--
2.39.2
