[PATCH] ASoC: soc-core.c: Skip dummy codec when adding platforms

[Chancel Liu <chancel.liu@xxxxxxx>]

When pcm_runtime is adding platform components it will scan all
registered components. In case of DPCM FE/BE some DAI links will
configure dummy platform. However both dummy codec and dummy platform
are using "snd-soc-dummy" as component->name. Dummy codec should be
skipped when adding platforms otherwise there'll be overflow and UBSAN
complains.

Reported-by: Zhipeng Wang <zhipeng.wang_1@xxxxxxx>
Signed-off-by: Chancel Liu <chancel.liu@xxxxxxx>
---
 sound/soc/soc-core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 1e94edba12eb..2ec13d1634b6 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1219,6 +1219,9 @@ static int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
 			if (!snd_soc_is_matching_component(platform, component))
 				continue;
 
+			if (snd_soc_component_is_dummy(component) && component->num_dai)
+				continue;
+
 			snd_soc_rtd_add_component(rtd, component);
 		}
 	}
-- 
2.43.0