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Date: Fri, 26 Apr 2019 21:40:14 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@...el.com>,
Mark Brown <broonie@...nel.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.19 17/53] ASoC: dapm: Fix NULL pointer dereference in snd_soc_dapm_free_kcontrol
From: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@...el.com>
[ Upstream commit cacea3a90e211f0c111975535508d446a4a928d2 ]
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>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 9b78fb3daa7b..2257b1b0151c 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -3847,6 +3847,10 @@ 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);
--
2.19.1
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