[PATCH 6.8 122/143] ASoC: soc-core.c: Skip dummy codec when adding platforms

Greg Kroah-Hartman
2024-04-11T10:12:48Z

From: Chancel Liu <chancel.liu@nxp.com>

[ Upstream commit 23fb6bc2696119391ec3a92ccaffe50e567c515e ]

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@nxp.com>
Signed-off-by: Chancel Liu <chancel.liu@nxp.com>
Link: https://msgid.link/r/20240305065606.3778642-1-chancel.liu@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 516350533e73f..8b5b583a2bad0 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1218,6 +1218,9 @@ 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