diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2022-04-25 14:45:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-14 19:32:38 +0300 |
| commit | 54c1e0e3bbcab2abe25b2874a43050ae5df87831 (patch) | |
| tree | 52b445ef22d2e135233a83f57af9c1e56707aed0 /drivers | |
| parent | 3660db29b0305f9a1d95979c7af0f5db6ea99f5d (diff) | |
| download | linux-54c1e0e3bbcab2abe25b2874a43050ae5df87831.tar.xz | |
iommu/arm-smmu-v3: check return value after calling platform_get_resource()
[ Upstream commit b131fa8c1d2afd05d0b7598621114674289c2fbb ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -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 483c1362cc4a..bc4cbc7542ce 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -3512,6 +3512,8 @@ 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; |