Linux Kernel dpaa2-Switch Interrupt Storm Vulnerability After Bad if_id in IRQ Handler

A vulnerability in the Linux kernel's dpaa2-switch component can lead to an interrupt storm. This issue arises after the IRQ handler receives a bad if_id, which is not properly cleared, causing repeated interrupt signals. The vulnerability is present in several versions of the Linux kernel.

Impact

The vulnerability can cause an interrupt storm, where the system receives a flood of interrupt signals, potentially leading to performance degradation or system instability.

Reproduction

The vulnerability can be reproduced by configuring a dpaa2 switch and sending an IRQ status that includes an out-of-bounds if_id. The IRQ handler will not clear the interrupt status, leading to an interrupt storm.

Remediation

Users can upgrade to the latest version of the Linux kernel, where this vulnerability has been addressed. Instructions for upgrading can be found in the official Linux kernel documentation.