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CVE-2021-47325

Disclosure Date: May 21, 2024
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Description

In the Linux kernel, the following vulnerability has been resolved:

iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation

The reference counting issue happens in several exception handling paths
of arm_smmu_iova_to_phys_hard(). When those error scenarios occur, the
function forgets to decrease the refcount of “smmu” increased by
arm_smmu_rpm_get(), causing a refcount leak.

Fix this issue by jumping to “out” label when those error scenarios
occur.

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General Information

Vendors

  • Linux

Products

  • Linux
Technical Analysis