CVE-2025-68333 sched_ext: Fix possible deadlock in the deferred_irq_workfn()

In the Linux kernel, the following vulnerability has been resolved: schedext: Fix possible deadlock in the deferredirqworkfn For PREEMPTRT=y kernels, the deferredirqworkfn is executed in the per-cpu irqwork/ task context and not disable-irq, if the rq returned by containerof is current CPU's rq,...