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ASoC: max98090: Move check for invalid values before casting in max98090_put_enab_tlv()

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[ Upstream commit f7a3444681 ]

Validation of signed input should be done before casting to unsigned int.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Suggested-by: Mark Brown <broonie@kernel.org>
Fixes: 2fbe467bcb ("ASoC: max98090: Reject invalid values in custom control put()")
Link: https://lore.kernel.org/r/1652999486-29653-1-git-send-email-khoroshilov@ispras.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alexey Khoroshilov 2022-05-20 01:31:26 +03:00 committed by Greg Kroah-Hartman
parent a89ca82d6b
commit 38acee9e14
1 changed files with 4 additions and 2 deletions
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6
sound/soc/codecs/max98090.c
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@ -393,7 +393,8 @@ static int max98090_put_enab_tlv(struct snd_kcontrol *kcontrol,
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
unsigned int mask = (1 << fls(mc->max)) - 1;
unsigned int sel = ucontrol->value.integer.value[0];
int sel_unchecked = ucontrol->value.integer.value[0];
unsigned int sel;
unsigned int val = snd_soc_component_read(component, mc->reg);
unsigned int *select;
@ -413,8 +414,9 @@ static int max98090_put_enab_tlv(struct snd_kcontrol *kcontrol,
val = (val >> mc->shift) & mask;
if (sel < 0 || sel > mc->max)
if (sel_unchecked < 0 || sel_unchecked > mc->max)
return -EINVAL;
sel = sel_unchecked;
*select = sel;