linux-kernel - [PATCH 08/20] hwmon: (nct6683) check return value after calling platform_get

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Date:   Fri, 22 Apr 2022 17:11:55 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <linux-hwmon@...r.kernel.org>
CC:     <linux@...ck-us.net>, <jdelvare@...e.com>
Subject: [PATCH 08/20] hwmon: (nct6683) check return value after calling platform_get_resource()

It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Fixes: 41082d66bfd6 ("hwmon: Driver for NCT6683D")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/hwmon/nct6683.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hwmon/nct6683.c b/drivers/hwmon/nct6683.c
index 6a9f420e7d32..12cac70ff493 100644
--- a/drivers/hwmon/nct6683.c
+++ b/drivers/hwmon/nct6683.c
@@ -1197,6 +1197,8 @@ static int nct6683_probe(struct platform_device *pdev)
 	char build[16];
 
 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	if (!res)
+		return -EINVAL;
 	if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
 		return -EBUSY;
 
-- 
2.25.1