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ASoC: ops: Reject out of bounds values in snd_soc_put_volsw_sx()

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We don't currently validate that the values being set are within the range
we advertised to userspace as being valid, do so and reject any values
that are out of range.

Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220124153253.3548853-3-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mark Brown 2022-01-24 15:32:52 +00:00
parent 817f7c9335
commit 4f1e50d6a9
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1 changed files with 8 additions and 1 deletions
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9
sound/soc/soc-ops.c
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@ -423,8 +423,15 @@ int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
int err = 0;
unsigned int val, val_mask;
val = ucontrol->value.integer.value[0];
if (mc->platform_max && val > mc->platform_max)
return -EINVAL;
if (val > max - min)
return -EINVAL;
if (val < 0)
return -EINVAL;
val_mask = mask << shift;
val = (ucontrol->value.integer.value[0] + min) & mask;
val = (val + min) & mask;
val = val << shift;
err = snd_soc_component_update_bits(component, reg, val_mask, val);