/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/ is in linux-headers-4.4.0-63-lowlatency 4.4.0-63.84.
This file is owned by root:root, with mode 0o755.
..
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/.bounds.s.cmd
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/Kconfig.freezer
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/Kconfig.hz
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/Kconfig.locks
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/Kconfig.preempt
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/Makefile
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/bounds.s
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/bpf
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/debug
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/events
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/gcov
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/irq
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/livepatch
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/locking
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/power
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/printk
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/rcu
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/sched
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/time
/usr/src/linux-headers-4.4.0-63-lowlatency/kernel/trace