ASoC: codecs: fix out-of-bounds access on invalid clock config

get_coeff() returns –EINVAL when no table entry matches.
The driver then uses that value as an index into coeff_div[],
causing an OOB access.

To fix lets abort the hw_params call instead.

Fixes: de2b311 ("ASoC: codecs: add support for ES8375")
Signed-off-by: Qasim Ijaz <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: qasim-ijaz

sound/soc/codecs/es8375.c

@@ -319,6 +319,7 @@ static int es8375_hw_params(struct snd_pcm_substream *substream,
 	coeff = get_coeff(es8375->vddd, dmic_enable, es8375->mclk_freq, params_rate(params));
 	if (coeff < 0) {
 		dev_warn(component->dev, "Clock coefficients do not match");
+		return coeff;
 	}
 	regmap_write(es8375->regmap, ES8375_CLK_MGR4,
 			coeff_div[coeff].Reg0x04);