CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's handling of PCI devices, specifically within the iommu_call_iopf_notifier() function, which fails to release a reference count for PCI devices after processing PPR faults. This oversight leads to a memory leak, potentially impacting system stability and resource management over time. Organizations utilizing Linux systems, particularly those relying on AMD IOMMU, should prioritize addressing this issue to prevent performance degradation and ensure optimal resource utilization.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Put PCI device after handling PPR faults iommu_call_iopf_notifier() looks up the requester with pci_get_domain_bus_and_slot(), which returns a PCI device with its reference count incremented. Neither the successful iommu_report_device_fault() path nor the abort path drops that reference, so every handled PPR request leaks a PCI device reference. This is the same ownership rule that was fixed for the old iommu_v2 ppr_notifier() path by commit 6cf0981c2233 ("iommu/amd: Fix pci device refcount leak in ppr_notifier()"), but iommu_call_iopf_notifier() was added later as a separate PPR/IOPF notifier path. Drop the PCI device reference after handling the PPR entry.