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iommu/mediatek: Check return value after calling platform_get_resource()
platform_get_resource() may return NULL pointer, we need check its
return value to avoid null-ptr-deref in resource_size().
Fixes: 42d57fc58a
("iommu/mediatek: Initialise/Remove for multi bank dev")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/20221029103550.3774365-1-yangyingliang@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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1 changed files with 2 additions and 0 deletions
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@ -1173,6 +1173,8 @@ static int mtk_iommu_probe(struct platform_device *pdev)
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banks_num = data->plat_data->banks_num;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -EINVAL;
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if (resource_size(res) < banks_num * MTK_IOMMU_BANK_SZ) {
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dev_err(dev, "banknr %d. res %pR is not enough.\n", banks_num, res);
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return -EINVAL;
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