Description
In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails arm_smmu_rpm_get() invokes pm_runtime_get_sync(), which increases the refcount of the "smmu" even though the return value is less than 0. The reference counting issue happens in some error handling paths of arm_smmu_rpm_get() in its caller functions. When arm_smmu_rpm_get() fails, the caller functions forget to decrease the refcount of "smmu" increased by arm_smmu_rpm_get(), causing a refcount leak. Fix this issue by calling pm_runtime_resume_and_get() instead of pm_runtime_get_sync() in arm_smmu_rpm_get(), which can keep the refcount balanced in case of failure.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d4a44f0750bb9bf7c44c22444a482756b2344a79 to < 3761ae0d0e549f2acdaf11f49df4ed06d256b20faffectedd4a44f0750bb9bf7c44c22444a482756b2344a79 to < c4007596fbdabc29f858dc2e1990858a146b60b2affectedd4a44f0750bb9bf7c44c22444a482756b2344a79 to < fbf4daa6f4105e01fbd3868006f65c163365c1e3affectedd4a44f0750bb9bf7c44c22444a482756b2344a79 to < fe92c058199067ae90cf2a901ddf3c271893557aaffectedd4a44f0750bb9bf7c44c22444a482756b2344a79 to < 1adf30f198c26539a62d761e45af72cde570413daffected
Linux Linux
Default version status: affected
5.0affected0 to < 5.0unaffected5.4.134 to ≤ 5.4.*unaffected5.10.52 to ≤ 5.10.*unaffected5.12.19 to ≤ 5.12.*unaffected5.13.4 to ≤ 5.13.*unaffected5.14 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3761ae0d0e549f2acdaf11f49df4ed06d256b20f ↗
- https://git.kernel.org/stable/c/c4007596fbdabc29f858dc2e1990858a146b60b2 ↗
- https://git.kernel.org/stable/c/fbf4daa6f4105e01fbd3868006f65c163365c1e3 ↗
- https://git.kernel.org/stable/c/fe92c058199067ae90cf2a901ddf3c271893557a ↗
- https://git.kernel.org/stable/c/1adf30f198c26539a62d761e45af72cde570413d ↗