Kernel reverts IRQ guard switch after Syzbot finds nested lock hazards
Refcounted interrupt disable lands for safer nesting and Rust SpinLockIrq, but wiring it into scoped cleanup guards is rolled back until stronger tooling exists.
By kexec#locking
Linux makes per-VMA locks unconditional across all configs
A Hansen/Baghdasaryan series drops architecture guards so binder and TCP paths can stop falling back to mmap_lock.
By kexec