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| author | Hanjun Guo <hanjun.guo@linaro.org> | 2017-05-12 05:55:27 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-05-12 10:25:37 +0200 |
| commit | ad7cc3c0c57d77b442db323056354d0e49833569 (patch) | |
| tree | 944c5bbd08132ead60669abda2b4a36cb74c5669 /drivers/irqchip/irq-mbigen.c | |
| parent | irqchip/mbigen: Fix memory mapping code (diff) | |
| download | linux-ad7cc3c0c57d77b442db323056354d0e49833569.tar.xz linux-ad7cc3c0c57d77b442db323056354d0e49833569.zip | |
irqchip/mbigen: Fix potential NULL dereferencing
platform_get_resource() may return NULL, add proper
check to avoid potential NULL dereferencing.
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: linuxarm@huawei.com
Cc: Wei Yongjun <weiyongjun1@huawei.com>
Cc: MaJun <majun258@huawei.com>
Link: http://lkml.kernel.org/r/1494561328-39514-3-git-send-email-guohanjun@huawei.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/irqchip/irq-mbigen.c')
| -rw-r--r-- | drivers/irqchip/irq-mbigen.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c index 0f5e66e96bd9..2fa1e457190d 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) { |