/usr/src/linux-headers-4.4.0-45/kernel/ is in linux-headers-4.4.0-45 4.4.0-45.66.
This file is owned by root:root, with mode 0o755.
..
/usr/src/linux-headers-4.4.0-45/kernel/Kconfig.freezer
/usr/src/linux-headers-4.4.0-45/kernel/Kconfig.hz
/usr/src/linux-headers-4.4.0-45/kernel/Kconfig.locks
/usr/src/linux-headers-4.4.0-45/kernel/Kconfig.preempt
/usr/src/linux-headers-4.4.0-45/kernel/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/bpf/
/usr/src/linux-headers-4.4.0-45/kernel/bpf/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/debug/
/usr/src/linux-headers-4.4.0-45/kernel/debug/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/debug/kdb/
/usr/src/linux-headers-4.4.0-45/kernel/debug/kdb/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/events/
/usr/src/linux-headers-4.4.0-45/kernel/events/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/gcov/
/usr/src/linux-headers-4.4.0-45/kernel/gcov/Kconfig
/usr/src/linux-headers-4.4.0-45/kernel/gcov/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/irq/
/usr/src/linux-headers-4.4.0-45/kernel/irq/Kconfig
/usr/src/linux-headers-4.4.0-45/kernel/irq/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/livepatch/
/usr/src/linux-headers-4.4.0-45/kernel/livepatch/Kconfig
/usr/src/linux-headers-4.4.0-45/kernel/livepatch/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/locking/
/usr/src/linux-headers-4.4.0-45/kernel/locking/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/power/
/usr/src/linux-headers-4.4.0-45/kernel/power/Kconfig
/usr/src/linux-headers-4.4.0-45/kernel/power/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/printk/
/usr/src/linux-headers-4.4.0-45/kernel/printk/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/rcu/
/usr/src/linux-headers-4.4.0-45/kernel/rcu/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/sched/
/usr/src/linux-headers-4.4.0-45/kernel/sched/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/time/
/usr/src/linux-headers-4.4.0-45/kernel/time/Kconfig
/usr/src/linux-headers-4.4.0-45/kernel/time/Makefile
/usr/src/linux-headers-4.4.0-45/kernel/trace/
/usr/src/linux-headers-4.4.0-45/kernel/trace/Kconfig
/usr/src/linux-headers-4.4.0-45/kernel/trace/Makefile