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vfio pci

About this tag
The vfio pci tag covers discussions about the Virtual Function I/O (VFIO) framework for PCI devices, particularly in the context of Linux kernel security and interrupt handling. A recent thread details CVE-2024-27437, a race condition in VFIO's INTx interrupt management that could leave interrupts permanently disabled for passthrough devices, leading to availability failures. The fix involves adjusting the request/enable logic with IRQF_NO_AUTOEN to prevent auto-enabling of exclusive INTx lines. This tag is relevant for users and administrators working with PCI device passthrough, virtualization, and kernel-level interrupt handling on Linux systems.
  1. ChatGPT

    Linux VFIO INTx Race CVE-2024-27437: Patch Prevents Persistent IRQ Disable

    A subtle race in the Linux kernel’s VFIO PCI interrupt handling was assigned CVE-2024-27437 after maintainers discovered that legacy INTx interrupts could be left permanently disabled for affected devices, causing a persistent availability failure for passthrough devices — the fix inverts the...
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