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From: Yang Yingliang <yangyingliang@huawei.com>
To: <linux-kernel@vger.kernel.org>, <linux-hwmon@vger.kernel.org>
Cc: <linux@roeck-us.net>, <jdelvare@suse.com>
Subject: [PATCH 20/20] hwmon: (w83781d) check return value after calling platform_get_resource()
Date: Fri, 22 Apr 2022 17:12:07 +0800	[thread overview]
Message-ID: <20220422091207.4034406-21-yangyingliang@huawei.com> (raw)
In-Reply-To: <20220422091207.4034406-1-yangyingliang@huawei.com>

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

Fixes: 7666c13c627f ("hwmon/w83781d: No longer use i2c-isa")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 drivers/hwmon/w83781d.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index b3579721265f..4fe6eec02570 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -1767,6 +1767,8 @@ w83781d_isa_probe(struct platform_device *pdev)
 
 	/* Reserve the ISA region */
 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	if (!res)
+		return -EINVAL;
 	if (!devm_request_region(&pdev->dev,
 				 res->start + W83781D_ADDR_REG_OFFSET, 2,
 				 "w83781d"))
-- 
2.25.1


  parent reply	other threads:[~2022-04-22  9:00 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-22  9:11 [PATCH 00/20] hwmon: check return value after calling platform_get_resource() Yang Yingliang
2022-04-22  9:11 ` [PATCH 01/20] hwmon: (abituguru) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 02/20] hwmon: (abituguru3) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 03/20] hwmon: (dme1737) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 04/20] hwmon: (f71805f) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 05/20] hwmon: (f71882fg) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 06/20] hwmon: (it87) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 07/20] hwmon: (lm78) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 08/20] hwmon: (nct6683) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 09/20] hwmon: (nct6775) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 10/20] hwmon: (sch5627) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 11/20] hwmon: (sch5636) " Yang Yingliang
2022-04-22  9:11 ` [PATCH 12/20] hwmon: (sis5595) " Yang Yingliang
2022-04-22  9:12 ` [PATCH 13/20] hwmon: (smsc47b397) " Yang Yingliang
2022-04-22  9:12 ` [PATCH 14/20] hwmon: (smsc47m1) " Yang Yingliang
2022-04-22  9:12 ` [PATCH 15/20] hwmon: (via686a) " Yang Yingliang
2022-04-22  9:12 ` [PATCH 16/20] hwmon: (vt1211) " Yang Yingliang
2022-04-22  9:12 ` [PATCH 17/20] hwmon: (vt8231) " Yang Yingliang
2022-04-22  9:12 ` [PATCH 18/20] hwmon: (w83627ehf) " Yang Yingliang
2022-04-22  9:12 ` [PATCH 19/20] hwmon: (w83627hf) " Yang Yingliang
2022-04-22  9:12 ` Yang Yingliang [this message]
2022-04-22 13:27 ` [PATCH 00/20] hwmon: " Guenter Roeck
2022-04-24  3:35   ` Yang Yingliang
2022-04-24  4:54     ` Guenter Roeck
2022-04-24  6:20       ` Yang Yingliang

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