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authorHanjun Guo <hanjun.guo@linaro.org>2017-05-12 06:55:27 +0300
committerThomas Gleixner <tglx@linutronix.de>2017-05-12 11:25:37 +0300
commitad7cc3c0c57d77b442db323056354d0e49833569 (patch)
tree944c5bbd08132ead60669abda2b4a36cb74c5669 /drivers/irqchip
parent5ba9b0a14132d0b8d97affe909f324045a968d03 (diff)
downloadlinux-ad7cc3c0c57d77b442db323056354d0e49833569.tar.xz
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')
-rw-r--r--drivers/irqchip/irq-mbigen.c3
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) {