This is a note to let you know that I've just added the patch titled
ASoC: ops: Validate input values in snd_soc_put_volsw_range()
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asoc-ops-validate-input-values-in-snd_soc_put_volsw_.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f07424adc080032773c51374acca75a1da2e2439
Author: Mark Brown <broonie@xxxxxxxxxx>
Date: Sat Apr 23 14:12:39 2022 +0100
ASoC: ops: Validate input values in snd_soc_put_volsw_range()
[ 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@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220423131239.3375261-1-broonie@xxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c
index 74968ddee49f..90ba5521c189 100644
--- a/sound/soc/soc-ops.c
+++ b/sound/soc/soc-ops.c
@@ -528,7 +528,15 @@ 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;
@@ -543,6 +551,14 @@ 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
