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Message-Id: <20190324231237.2246-1-kjlu@umn.edu>
Date:   Sun, 24 Mar 2019 18:12:37 -0500
From:   Kangjie Lu <kjlu@....edu>
To:     kjlu@....edu
Cc:     pakki001@....edu, Bard Liao <bardliao@...ltek.com>,
        Oder Chiou <oder_chiou@...ltek.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] sound: codecs: fix a potential NULL pointer dereference

In case devm_kzalloc fails, the patch returns -ENOMEM to avoid
potential NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@....edu>
---
 sound/soc/codecs/rt5663.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/codecs/rt5663.c b/sound/soc/codecs/rt5663.c
index da6647015708..909ab99a1995 100644
--- a/sound/soc/codecs/rt5663.c
+++ b/sound/soc/codecs/rt5663.c
@@ -3480,6 +3480,8 @@ static int rt5663_parse_dp(struct rt5663_priv *rt5663, struct device *dev)
 		table_size = sizeof(struct impedance_mapping_table) *
 			rt5663->pdata.impedance_sensing_num;
 		rt5663->imp_table = devm_kzalloc(dev, table_size, GFP_KERNEL);
+		if (!rt5663->imp_table)
+			return -ENOMEM;
 		device_property_read_u32_array(dev,
 			"realtek,impedance_sensing_table",
 			(u32 *)rt5663->imp_table, table_size);
-- 
2.17.1

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