[PATCH 1/4] ASoC: meson: g12a-toacodec: Validate written enum values
Mark Brown
broonie at kernel.org
Wed Jan 3 10:34:01 PST 2024
When writing to an enum we need to verify that the value written is valid
for the enumeration, the helper function snd_soc_item_enum_to_val() doesn't
do it since it needs to return an unsigned (and in any case we'd need to
check the return value).
Fixes: af2618a2eee8 ("ASoC: meson: g12a: add internal DAC glue driver")
Signed-off-by: Mark Brown <broonie at kernel.org>
---
sound/soc/meson/g12a-toacodec.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/sound/soc/meson/g12a-toacodec.c b/sound/soc/meson/g12a-toacodec.c
index 6c4503766fdc..dd7f07de2685 100644
--- a/sound/soc/meson/g12a-toacodec.c
+++ b/sound/soc/meson/g12a-toacodec.c
@@ -71,6 +71,9 @@ static int g12a_toacodec_mux_put_enum(struct snd_kcontrol *kcontrol,
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
unsigned int mux, reg;
+ if (ucontrol->value.enumerated.item[0] >= e->items)
+ return -EINVAL;
+
mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
regmap_field_read(priv->field_dat_sel, ®);
--
2.39.2
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