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ASoC: fsl_easrc: Check the variable range in fsl_easrc_iec958_put_bits()

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Add check of input value's range in fsl_easrc_iec958_put_bits(),
otherwise the wrong value may be written from user space.

Fixes: 955ac62405 ("ASoC: fsl_easrc: Add EASRC ASoC CPU DAI drivers")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-10-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Shengjiu Wang 2026-04-01 17:42:24 +08:00 committed by Mark Brown
parent 64a496ba97
commit 00541b86fb
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1 changed files with 3 additions and 0 deletions
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3
sound/soc/fsl/fsl_easrc.c
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@ -54,6 +54,9 @@ static int fsl_easrc_iec958_put_bits(struct snd_kcontrol *kcontrol,
unsigned int regval = ucontrol->value.integer.value[0];
int ret;
if (regval < EASRC_WIDTH_16_BIT || regval > EASRC_WIDTH_24_BIT)
return -EINVAL;
ret = (easrc_priv->bps_iec958[mc->regbase] != regval);
easrc_priv->bps_iec958[mc->regbase] = regval;