ptracer_capable 253 include/linux/capability.h extern bool ptracer_capable(struct task_struct *tsk, struct user_namespace *ns); ptracer_capable 55 kernel/ptrace.c !ptracer_capable(tsk, mm->user_ns))) { ptracer_capable 840 security/commoncap.c !ptracer_capable(current, new->user_ns))) {