CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's Ethernet driver for the ARC EMAC, where stale or latched interrupt statuses from firmware or the bootloader can lead to race conditions during device teardown. This could allow spurious interrupts to be delivered, potentially causing system instability or unexpected behavior. Organizations using Linux systems with ARC EMAC hardware should prioritize this fix to ensure reliable network operations and prevent potential disruptions.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: arc: emac: quiesce interrupts before requesting IRQ Normal RX/TX interrupts are enabled later, in arc_emac_open(), so probe should not see interrupt delivery in the usual case. However, hardware may still present stale or latched interrupt status left by firmware or the bootloader. If probe later unwinds after devm_request_irq() has installed the handler, such a stale interrupt can still reach arc_emac_intr() during teardown and race with release of the associated net_device. Avoid that window by putting the device into a known quiescent state before requesting the IRQ: disable all EMAC interrupt sources and clear any pending EMAC interrupt status bits. This keeps the change hardware-focused and minimal, while preventing spurious IRQ delivery from leftover state.