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ASoC: dapm: Fix NULL pointer dereference in snd_soc_dapm_free_kcontrol 

w_text_param can be NULL and it is being dereferenced without checking.
Add the missing sanity check to prevent  NULL pointer dereference.

Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pankaj Bharadiya 2019-03-22 18:00:09 +05:30 committed by Mark Brown
parent 8f71370f4b
commit cacea3a90e
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1 changed files with 4 additions and 0 deletions
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sound/soc/soc-dapm.c
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@ -3957,6 +3957,10 @@ snd_soc_dapm_free_kcontrol(struct snd_soc_card *card,
int count;
devm_kfree(card->dev, (void *)*private_value);
if (!w_param_text)
return;
for (count = 0 ; count < num_params; count++)
devm_kfree(card->dev, (void *)w_param_text[count]);
devm_kfree(card->dev, w_param_text);