CVE-2026-31480

In the Linux kernel, the following vulnerability has been resolved:

tracing: Fix potential deadlock in cpu hotplug with osnoise

The following sequence may leads deadlock in cpu hotplug:

task1        task2        task3
-----        -----        -----

mutex_lock(&interface_lock)

        [CPU GOING OFFLINE]

        cpus_write_lock();
        osnoise_cpu_die();
          kthread_stop(task3);
            wait_for_completion();

                  osnoise_sleep();
                    mutex_lock(&interface_lock);

cpus_read_lock();

[DEAD LOCK]

Fix by swap the order of cpus_read_lock() and mutex_lock(&interface_lock).