[PATCH 1/1] power: check return value of devm_kzalloc

[Pan Bian]

Function devm_kzalloc() will return a NULL pointer if there is no enough
memory. However, in function isp1704_charger_probe(), the return value
of devm_kzalloc() is used without validation. This may result in a bad
memory access bug. This patch fixes the bug.

Signed-off-by: Pan Bian <bianpan2016@xxxxxxx>
---
 drivers/power/supply/isp1704_charger.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/power/supply/isp1704_charger.c b/drivers/power/supply/isp1704_charger.c
index 4cd6899..4dd2482 100644
--- a/drivers/power/supply/isp1704_charger.c
+++ b/drivers/power/supply/isp1704_charger.c
@@ -418,6 +418,8 @@ static int isp1704_charger_probe(struct platform_device *pdev)
 
 		pdata = devm_kzalloc(&pdev->dev,
 			sizeof(struct isp1704_charger_data), GFP_KERNEL);
+		if (!pdata)
+			return -ENOMEM;
 		pdata->enable_gpio = gpio;
 
 		dev_info(&pdev->dev, "init gpio %d\n", pdata->enable_gpio);
-- 
1.9.1