It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.
Fixes: 42d57fc58aeb ("iommu/mediatek: Initialise/Remove for multi bank dev")
Reported-by: Hulk Robot <[email protected]>
Signed-off-by: Yang Yingliang <[email protected]>
---
drivers/iommu/mtk_iommu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index b2ae84046249..b45b0c1cfff9 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1174,6 +1174,8 @@ static int mtk_iommu_probe(struct platform_device *pdev)
banks_num = data->plat_data->banks_num;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
if (resource_size(res) < banks_num * MTK_IOMMU_BANK_SZ) {
dev_err(dev, "banknr %d. res %pR is not enough.\n", banks_num,
res);
return -EINVAL;
--
2.25.1
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