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ASoC: ops: Validate input values in snd_soc_put_volsw_range()

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[ Upstream commit aa22125c57f9e577f0a667e4fa07fc3fa8ca1e60 ]

Check that values written via snd_soc_put_volsw_range() are
within the range advertised by the control, ensuring that we
don't write out of spec values to the hardware.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220423131239.3375261-1-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mark Brown 2022-04-23 14:12:39 +01:00 committed by Greg Kroah-Hartman
parent 31606a73ba
commit 03ebc6fd5c
1 changed files with 17 additions and 1 deletions
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18
sound/soc/soc-ops.c
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@ -510,7 +510,15 @@ int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
unsigned int mask = (1 << fls(max)) - 1;
unsigned int invert = mc->invert;
unsigned int val, val_mask;
int err, ret;
int err, ret, tmp;
tmp = ucontrol->value.integer.value[0];
if (tmp < 0)
return -EINVAL;
if (mc->platform_max && tmp > mc->platform_max)
return -EINVAL;
if (tmp > mc->max - mc->min + 1)
return -EINVAL;
if (invert)
val = (max - ucontrol->value.integer.value[0]) & mask;
@ -525,6 +533,14 @@ int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
ret = err;
if (snd_soc_volsw_is_stereo(mc)) {
tmp = ucontrol->value.integer.value[1];
if (tmp < 0)
return -EINVAL;
if (mc->platform_max && tmp > mc->platform_max)
return -EINVAL;
if (tmp > mc->max - mc->min + 1)
return -EINVAL;
if (invert)
val = (max - ucontrol->value.integer.value[1]) & mask;
else