[alsa-devel] [PATCH v3 07/10] ASoC: cros_ec_codec: support WoV

[kbuild test robot]

Hi Tzung-Bi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on asoc/for-next]
[cannot apply to v5.4-rc3 next-20191014]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Tzung-Bi-Shih/ASoC-mediatek-mt8183-mt6358-ts3a227-max98357-support-WoV/20191014-183227
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp at intel.com>


coccinelle warnings: (new ones prefixed by >>)

>> sound/soc/codecs/cros_ec_codec.c:774:7-14: WARNING opportunity for memdup_user

vim +774 sound/soc/codecs/cros_ec_codec.c

   754	
   755	static int wov_hotword_model_put(struct snd_kcontrol *kcontrol,
   756					 const unsigned int __user *bytes,
   757					 unsigned int size)
   758	{
   759		struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
   760		struct cros_ec_codec_priv *priv =
   761			snd_soc_component_get_drvdata(component);
   762		struct ec_param_ec_codec_wov p;
   763		struct ec_response_ec_codec_wov_get_lang r;
   764		uint8_t digest[SHA256_DIGEST_SIZE];
   765		uint8_t *buf;
   766		int ret;
   767	
   768		/* Skips the TLV header. */
   769		bytes += 2;
   770		size -= 8;
   771	
   772		dev_dbg(priv->dev, "%s: size=%d\n", __func__, size);
   773	
 > 774		buf = kmalloc(size, GFP_KERNEL);
   775		if (!buf)
   776			return -ENOMEM;
   777	
   778		if (copy_from_user(buf, bytes, size)) {
   779			ret = -EFAULT;
   780			goto leave;
   781		}
   782	
   783		ret = calculate_sha256(priv, buf, size, digest);
   784		if (ret)
   785			goto leave;
   786	
   787		p.cmd = EC_CODEC_WOV_GET_LANG;
   788		ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,
   789					   (uint8_t *)&p, sizeof(p),
   790					   (uint8_t *)&r, sizeof(r));
   791		if (ret)
   792			goto leave;
   793	
   794		if (memcmp(digest, r.hash, SHA256_DIGEST_SIZE) == 0) {
   795			dev_dbg(priv->dev, "not updated");
   796			goto leave;
   797		}
   798	
   799		if (ec_codec_capable(priv, EC_CODEC_CAP_WOV_LANG_SHM))
   800			ret = wov_set_lang_shm(priv, buf, size, digest);
   801		else
   802			ret = wov_set_lang(priv, buf, size, digest);
   803	
   804	leave:
   805		kfree(buf);
   806		return ret;
   807	}
   808	

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