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ASoC: ops: Shift tested values in snd_soc_put_volsw() by +min

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While the $val/$val2 values passed in from userspace are always >= 0
integers, the limits of the control can be signed integers and the $min
can be non-zero and less than zero. To correctly validate $val/$val2
against platform_max, add the $min offset to val first.

Fixes: 817f7c9335 ("ASoC: ops: Reject out of bounds values in snd_soc_put_volsw()")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220215130645.164025-1-marex@denx.de
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Marek Vasut 2022-02-15 14:06:45 +01:00 committed by Mark Brown
parent a887f9c7a4
commit 9bdd10d57a
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1 changed files with 2 additions and 2 deletions
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4
sound/soc/soc-ops.c
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@ -319,7 +319,7 @@ int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
if (ucontrol->value.integer.value[0] < 0)
return -EINVAL;
val = ucontrol->value.integer.value[0];
if (mc->platform_max && val > mc->platform_max)
if (mc->platform_max && ((int)val + min) > mc->platform_max)
return -EINVAL;
if (val > max - min)
return -EINVAL;
@ -332,7 +332,7 @@ int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
if (ucontrol->value.integer.value[1] < 0)
return -EINVAL;
val2 = ucontrol->value.integer.value[1];
if (mc->platform_max && val2 > mc->platform_max)
if (mc->platform_max && ((int)val2 + min) > mc->platform_max)
return -EINVAL;
if (val2 > max - min)
return -EINVAL;