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irq masking

About this tag
IRQ masking refers to the practice of disabling or enabling interrupt requests (IRQs) to control device communication with the CPU. On WindowsForum.com, discussions cover IRQ masking in the context of Linux kernel vulnerabilities, specifically CVE-2024-27437, which involves a race condition in VFIO INTx interrupt handling that could leave interrupts permanently disabled. The fix uses IRQF_NO_AUTOEN to prevent auto-enabling of exclusive INTx lines. While the content focuses on Linux, IRQ masking is a general hardware and low-level software concept relevant to system stability and device passthrough scenarios. Users exploring this tag will find technical analysis of interrupt management and kernel patching.
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    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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