From ad7cc3c0c57d77b442db323056354d0e49833569 Mon Sep 17 00:00:00 2001 From: Hanjun Guo Date: Fri, 12 May 2017 11:55:27 +0800 Subject: 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 Acked-by: Marc Zyngier Cc: Kefeng Wang Cc: linuxarm@huawei.com Cc: Wei Yongjun Cc: MaJun Link: http://lkml.kernel.org/r/1494561328-39514-3-git-send-email-guohanjun@huawei.com Signed-off-by: Thomas Gleixner --- drivers/irqchip/irq-mbigen.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/irqchip/irq-mbigen.c') 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) { -- cgit v1.2.1