From: Hanjun Guo <guohanjun@huawei.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Marc Zyngier <marc.zyngier@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>,
Wei Yongjun <weiyongjun1@huawei.com>, MaJun <majun258@huawei.com>,
<linux-kernel@vger.kernel.org>,
Hanjun Guo <hanjun.guo@linaro.org>
Subject: [PATCH 2/3] irqchip/mbigen: Fix potential NULL dereferencing
Date: Tue, 2 May 2017 15:06:35 +0800 [thread overview]
Message-ID: <1493708796-43561-2-git-send-email-guohanjun@huawei.com> (raw)
In-Reply-To: <1493708796-43561-1-git-send-email-guohanjun@huawei.com>
From: Hanjun Guo <hanjun.guo@linaro.org>
platform_get_resource() may return NULL, add proper
check to avoid potential NULL dereferencing.
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
---
drivers/irqchip/irq-mbigen.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c
index e1d99f4..167cdb5 100644
--- a/drivers/irqchip/irq-mbigen.c
+++ b/drivers/irqchip/irq-mbigen.c
@@ -337,6 +337,9 @@ static int mbigen_device_probe(struct platform_device *pdev)
mgn_chip->pdev = pdev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+
mgn_chip->base = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (!mgn_chip->base) {
--
1.7.12.4
next prev parent reply other threads:[~2017-05-02 7:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-02 7:06 [PATCH 1/3] irqchip/mbigen: Fix memory mapping code Hanjun Guo
2017-05-02 7:06 ` Hanjun Guo [this message]
2017-05-02 7:06 ` [PATCH 3/3] irqchip/mbigen: Fix the clear register offset Hanjun Guo
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