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Commit ad7cc3c0 authored by Hanjun Guo's avatar Hanjun Guo Committed by Thomas Gleixner
Browse files

irqchip/mbigen: Fix potential NULL dereferencing 



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

Signed-off-by: default avatarHanjun Guo <hanjun.guo@linaro.org>
Acked-by: default avatarMarc 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: default avatarThomas Gleixner <tglx@linutronix.de>
parent 5ba9b0a1

drivers/irqchip/irq-mbigen.c

+3 −0
Original line number Diff line number Diff line
@@ -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) {