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

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

Shengjiu Wang committed 7 months ago

Commit 00541b81 parent 64a496b1 file · +3 −0Browse files

Unified · Split

@@ -54,6 +54,9 @@ static int fsl_easrc_iec958_put_bits(struct snd_kcontrol *kcontrol, · 53 unmodified lines
54	unsigned int regval = ucontrol->value.integer.value[0];	54	unsigned int regval = ucontrol->value.integer.value[0];
55	int ret;	55	int ret;
56		56
		57	if (regval < EASRC_WIDTH_16_BIT \|\| regval > EASRC_WIDTH_24_BIT)
		58	return -EINVAL;
		59
57	ret = (easrc_priv->bps_iec958[mc->regbase] != regval);	60	ret = (easrc_priv->bps_iec958[mc->regbase] != regval);
58		61
59	easrc_priv->bps_iec958[mc->regbase] = regval;	62	easrc_priv->bps_iec958[mc->regbase] = regval;