CVE-2025-21817

In the Linux kernel, the following vulnerability has been resolved: block: mark GFP_NOIO around sysfs ->store() sysfs ->store is called with queue freezed, meantime we have several ->store() callbacks(update_nr_requests, wbt, scheduler) to allocate memory with GFP_KERNEL which may run into direct reclaim code path, then potential deadlock can be caused. Fix the issue by marking NOIO around sysfs ->store()

• 416baaa9-dc9f-4396-8d5f-8c081fb06d67
• 416baaa9-dc9f-4396-8d5f-8c081fb06d67