CVE-2026-89453

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.