diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2022-04-25 14:45:25 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-05-06 18:24:57 +0300 |
| commit | b131fa8c1d2afd05d0b7598621114674289c2fbb (patch) | |
| tree | 0c017e905a58d9555368297f4387ec4763278abe /drivers/iommu | |
| parent | d9ed8af1dee37f181096631fb03729ece98ba816 (diff) | |
| download | linux-b131fa8c1d2afd05d0b7598621114674289c2fbb.tar.xz | |
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: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220425114525.2651143-1-yangyingliang@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 627a3ed5ee8f..88817a3376ef 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -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; |