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Date: Fri, 22 Mar 2019 18:00:09 +0530 From: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@...el.com> To: lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org Cc: linux-kernel@...r.kernel.org, pankaj.laxminarayan.bharadiya@...el.com Subject: [PATCH] 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@...el.com> --- sound/soc/soc-dapm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 1ec06ef..67b032c 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -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); -- 2.7.4
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