Commit b131fa8c authored by Yang Yingliang's avatar Yang Yingliang Committed by Will Deacon
Browse files

iommu/arm-smmu-v3: check return value after calling platform_get_resource() 



It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220425114525.2651143-1-yangyingliang@huawei.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent d9ed8af1

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

+2 −0
Original line number Diff line number Diff line
@@ -3770,6 +3770,8 @@ static int arm_smmu_device_probe(struct platform_device *pdev) 


	/* Base address */

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!res)

		return -EINVAL;

	if (resource_size(res) < arm_smmu_resource_size(smmu)) {

		dev_err(dev, "MMIO region too small (%pr)\n", res);

		return -EINVAL;