Linux Kernel Tegra Platforms Unsafe Interrupt Handling Vulnerability

A vulnerability in the Linux kernel's handling of interrupts has been addressed. On Tegra platforms, resuming from system suspend previously triggered a warning because the function generic_handle_irq() was called from a non-interrupt context, which is unsafe. This issue has been resolved by deferring the generic_handle_irq() call to an IRQ work that executes in a hard IRQ context, where it can be safely called. The fix involves using a specific variant of IRQ work initialization that ensures compatibility with PREEMPT_RT kernels, without impacting standard kernel configurations.

Impact

The vulnerability could lead to warnings being generated during the resume process from system suspend, indicating that interrupts were not handled in a safe manner.

Remediation

Users can apply the latest patches from the Linux kernel stable tree to address this vulnerability.