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[1/4] ASoC: meson: g12a-toacodec: Validate written enum values

Message ID 20240103-meson-enum-val-v1-1-424af7a8fb91@kernel.org (mailing list archive)
State New, archived
Headers show
Series ASoC: meson: Fix issues with LibreTech Saphire | expand

Commit Message

Mark Brown Jan. 3, 2024, 6:34 p.m. UTC 
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@kernel.org>
---
 sound/soc/meson/g12a-toacodec.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

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, &reg);