Linux Kernel GICv3 ITS Interrupt Handling Vulnerability

A vulnerability in the Linux kernel's GICv3 ITS interrupt handling has been addressed. The issue involved enabling interrupts within a nested interrupt-disabled section, which could lead to unexpected behavior. This vulnerability was introduced in a previous commit that altered the interrupt handling mechanism, and it has been resolved by restoring the original locking approach.

Impact

The vulnerability could cause interrupts to be incorrectly enabled in a section of code where they were meant to be disabled, potentially leading to a disruption in interrupt handling and causing nested interrupts to be processed incorrectly.