165 static bool ptrace_freeze_traced(struct task_struct *task)  in ptrace_freeze_traced()  argument
170 	if (task->jobctl & JOBCTL_LISTENING)  in ptrace_freeze_traced()
173 	spin_lock_irq(&task->sighand->siglock);  in ptrace_freeze_traced()
174 	if (task_is_traced(task) && !__fatal_signal_pending(task)) {  in ptrace_freeze_traced()
175 		task->state = __TASK_TRACED;  in ptrace_freeze_traced()
178 	spin_unlock_irq(&task->sighand->siglock);  in ptrace_freeze_traced()
183 static void ptrace_unfreeze_traced(struct task_struct *task)  in ptrace_unfreeze_traced()  argument
185 	if (task->state != __TASK_TRACED)  in ptrace_unfreeze_traced()
188 	WARN_ON(!task->ptrace || task->parent != current);  in ptrace_unfreeze_traced()
194 	spin_lock_irq(&task->sighand->siglock);  in ptrace_unfreeze_traced()
195 	if (task->state == __TASK_TRACED) {  in ptrace_unfreeze_traced()
196 		if (__fatal_signal_pending(task))  in ptrace_unfreeze_traced()
197 			wake_up_state(task, __TASK_TRACED);  in ptrace_unfreeze_traced()
199 			task->state = TASK_TRACED;  in ptrace_unfreeze_traced()
201 	spin_unlock_irq(&task->sighand->siglock);  in ptrace_unfreeze_traced()
268 static int __ptrace_may_access(struct task_struct *task, unsigned int mode)  in __ptrace_may_access()  argument
290 	if (same_thread_group(task, current))  in __ptrace_may_access()
308 	tcred = __task_cred(task);  in __ptrace_may_access()
322 	mm = task->mm;  in __ptrace_may_access()
328 	return security_ptrace_access_check(task, mode);  in __ptrace_may_access()
331 bool ptrace_may_access(struct task_struct *task, unsigned int mode)  in ptrace_may_access()  argument
334 	task_lock(task);  in ptrace_may_access()
335 	err = __ptrace_may_access(task, mode);  in ptrace_may_access()
336 	task_unlock(task);  in ptrace_may_access()
340 static int ptrace_attach(struct task_struct *task, long request,  in ptrace_attach()  argument
358 	audit_ptrace(task);  in ptrace_attach()
361 	if (unlikely(task->flags & PF_KTHREAD))  in ptrace_attach()
363 	if (same_thread_group(task, current))  in ptrace_attach()
372 	if (mutex_lock_interruptible(&task->signal->cred_guard_mutex))  in ptrace_attach()
375 	task_lock(task);  in ptrace_attach()
376 	retval = __ptrace_may_access(task, PTRACE_MODE_ATTACH_REALCREDS);  in ptrace_attach()
377 	task_unlock(task);  in ptrace_attach()
383 	if (unlikely(task->exit_state))  in ptrace_attach()
385 	if (task->ptrace)  in ptrace_attach()
390 	task->ptrace = flags;  in ptrace_attach()
392 	ptrace_link(task, current);  in ptrace_attach()
396 		send_sig_info(SIGSTOP, SEND_SIG_FORCED, task);  in ptrace_attach()
398 	spin_lock(&task->sighand->siglock);  in ptrace_attach()
417 	if (task_is_stopped(task) &&  in ptrace_attach()
418 	    task_set_jobctl_pending(task, JOBCTL_TRAP_STOP | JOBCTL_TRAPPING))  in ptrace_attach()
419 		signal_wake_up_state(task, __TASK_STOPPED);  in ptrace_attach()
421 	spin_unlock(&task->sighand->siglock);  in ptrace_attach()
427 	mutex_unlock(&task->signal->cred_guard_mutex);  in ptrace_attach()
437 		wait_on_bit(&task->jobctl, JOBCTL_TRAPPING_BIT, TASK_KILLABLE);  in ptrace_attach()
438 		proc_ptrace_connector(task, PTRACE_ATTACH);  in ptrace_attach()
852 static int ptrace_regset(struct task_struct *task, int req, unsigned int type,  in ptrace_regset()  argument
855 	const struct user_regset_view *view = task_user_regset_view(task);  in ptrace_regset()
867 		return copy_regset_to_user(task, view, regset_no, 0,  in ptrace_regset()
870 		return copy_regset_from_user(task, view, regset_no, 0,  in ptrace_regset()