[PATCH AUTOSEL 4.19 44/68] gpio: aspeed: fix a potential NULL pointer dereference

[Sasha Levin]

From: Kangjie Lu <kjlu@xxxxxxx>

[ Upstream commit 6cf4511e9729c00a7306cf94085f9cc3c52ee723 ]

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

Signed-off-by: Kangjie Lu <kjlu@xxxxxxx>
Reviewed-by: Andrew Jeffery <andrew@xxxxxxxx>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin (Microsoft) <sashal@xxxxxxxxxx>
---
 drivers/gpio/gpio-aspeed.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c
index 2342e154029b..b696ec35efb3 100644
--- a/drivers/gpio/gpio-aspeed.c
+++ b/drivers/gpio/gpio-aspeed.c
@@ -1225,6 +1225,8 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev)
 
 	gpio->offset_timer =
 		devm_kzalloc(&pdev->dev, gpio->chip.ngpio, GFP_KERNEL);
+	if (!gpio->offset_timer)
+		return -ENOMEM;
 
 	return aspeed_gpio_setup_irqs(gpio, pdev);
 }
-- 
2.19.1