PCI: endpoint: Fix PCI domain ID release in pci_epc_destroy(… (CVE-2024-56561)

Summary

PCI: endpoint: Fix PCI domain ID release in pci_epc_destroy()

The description as published by the source.

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

PCI: endpoint: Fix PCI domain ID release in pci_epc_destroy()

pci_epc_destroy() invokes pci_bus_release_domain_nr() to release the PCI
domain ID, but there are two issues:

'epc->dev' is passed to pci_bus_release_domain_nr() which was already
freed by device_unregister(), leading to a use-after-free issue.
Domain ID corresponds to the EPC device parent, so passing 'epc->dev'
is also wrong.

Fix these issues by passing 'epc->dev.parent' to
pci_bus_release_domain_nr() and also do it before device_unregister().

[mani: reworded subject and description]

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Linux Kernel

[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"fixed":"6.12.4"}]}]

Fixed packages published by each distribution for this CVE