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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Zheng Yongjun <zhengyongjun3@huawei.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.18 492/879] thermal/drivers/broadcom: Fix potential NULL dereference in sr_thermal_probe
Date:   Tue,  7 Jun 2022 19:00:10 +0200
Message-Id: <20220607165017.152295215@linuxfoundation.org>
In-Reply-To: <20220607165002.659942637@linuxfoundation.org>
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From: Zheng Yongjun <zhengyongjun3@huawei.com>

[ Upstream commit e20d136ec7d6f309989c447638365840d3424c8e ]

platform_get_resource() may return NULL, add proper check to
avoid potential NULL dereferencing.

Fixes: 250e211057c72 ("thermal: broadcom: Add Stingray thermal driver")
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20220425092929.90412-1-zhengyongjun3@huawei.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/thermal/broadcom/sr-thermal.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/thermal/broadcom/sr-thermal.c b/drivers/thermal/broadcom/sr-thermal.c
index 475ce2900771..85ab9edd580c 100644
--- a/drivers/thermal/broadcom/sr-thermal.c
+++ b/drivers/thermal/broadcom/sr-thermal.c
@@ -60,6 +60,9 @@ static int sr_thermal_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENOENT;
+
 	sr_thermal->regs = (void __iomem *)devm_memremap(&pdev->dev, res->start,
 							 resource_size(res),
 							 MEMREMAP_WB);
-- 
2.35.1