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.
References
Configurations
Configuration 1 (hide)
|
History
02 Apr 2025, 14:33
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| References | () https://git.kernel.org/stable/c/1adf30f198c26539a62d761e45af72cde570413d - Patch | |
| References | () https://git.kernel.org/stable/c/3761ae0d0e549f2acdaf11f49df4ed06d256b20f - Patch | |
| References | () https://git.kernel.org/stable/c/c4007596fbdabc29f858dc2e1990858a146b60b2 - Patch | |
| References | () https://git.kernel.org/stable/c/fbf4daa6f4105e01fbd3868006f65c163365c1e3 - Patch | |
| References | () https://git.kernel.org/stable/c/fe92c058199067ae90cf2a901ddf3c271893557a - Patch |
Information
Published : 2024-05-21 15:15
Updated : 2025-04-02 14:33
NVD link : CVE-2021-47327
Mitre link : CVE-2021-47327
CVE.ORG link : CVE-2021-47327
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-911
Improper Update of Reference Count