diff options
| author | Mark Brown <broonie@kernel.org> | 2022-04-23 14:12:39 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-04-26 15:13:36 +0100 |
| commit | aa22125c57f9e577f0a667e4fa07fc3fa8ca1e60 (patch) | |
| tree | babd483d382775acfcfc2b7494482c372604fc11 /sound/soc/soc-ops.c | |
| parent | 660564fc9a92a893a14f255be434f7ea0b967901 (diff) | |
| download | lwn-aa22125c57f9e577f0a667e4fa07fc3fa8ca1e60.tar.gz lwn-aa22125c57f9e577f0a667e4fa07fc3fa8ca1e60.zip | |
ASoC: ops: Validate input values in snd_soc_put_volsw_range()
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>
Diffstat (limited to 'sound/soc/soc-ops.c')
| -rw-r--r-- | sound/soc/soc-ops.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c index 58347eadd219..e693070f51fe 100644 --- a/sound/soc/soc-ops.c +++ b/sound/soc/soc-ops.c @@ -519,7 +519,15 @@ 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; @@ -534,6 +542,14 @@ 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 |