[PATCH] sound: codecs: fix a potential NULL pointer dereference

[Kangjie Lu]

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

Signed-off-by: Kangjie Lu <k...@umn.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