diff options
| author | Alexey Khoroshilov <khoroshilov@ispras.ru> | 2022-05-20 01:31:26 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-05-20 13:43:10 +0100 |
| commit | f7a344468105ef8c54086dfdc800e6f5a8417d3e (patch) | |
| tree | 999d00070549f90d6e8f757aabd6bcf346265b55 | |
| parent | affa9983e7cbac8cbe2596975efacdbdf0eb18e9 (diff) | |
ASoC: max98090: Move check for invalid values before casting in max98090_put_enab_tlv()
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: 2fbe467bcbfc ("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>
| -rw-r--r-- | sound/soc/codecs/max98090.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c index 48dcf071bb5a..576277a82d41 100644 --- a/sound/soc/codecs/max98090.c +++ b/sound/soc/codecs/max98090.c @@ -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; int change; @@ -414,8 +415,9 @@ 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; change = *select != sel; *select = sel; |