linux-kernel - [PATCH 4.19 50/72] gpio: aspeed: fix a potential NULL pointer dereference

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Message-Id: <20190502143337.409782370@linuxfoundation.org>
Date:   Thu,  2 May 2019 17:21:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kangjie Lu <kjlu@....edu>,
        Andrew Jeffery <andrew@...id.au>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "Sasha Levin (Microsoft)" <sashal@...nel.org>
Subject: [PATCH 4.19 50/72] gpio: aspeed: fix a potential NULL pointer dereference

[ Upstream commit 6cf4511e9729c00a7306cf94085f9cc3c52ee723 ]

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

Signed-off-by: Kangjie Lu <kjlu@....edu>
Reviewed-by: Andrew Jeffery <andrew@...id.au>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
Signed-off-by: Sasha Levin (Microsoft) <sashal@...nel.org>
---
 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