173 static bool ptrace_freeze_traced(struct task_struct *task)  in ptrace_freeze_traced()  argument
178 	if (task->jobctl & JOBCTL_LISTENING)  in ptrace_freeze_traced()
181 	spin_lock_irq(&task->sighand->siglock);  in ptrace_freeze_traced()
182 	if (task_is_traced(task) && !__fatal_signal_pending(task)) {  in ptrace_freeze_traced()
183 		task->state = __TASK_TRACED;  in ptrace_freeze_traced()
186 	spin_unlock_irq(&task->sighand->siglock);  in ptrace_freeze_traced()
191 static void ptrace_unfreeze_traced(struct task_struct *task)  in ptrace_unfreeze_traced()  argument
193 	if (task->state != __TASK_TRACED)  in ptrace_unfreeze_traced()
196 	WARN_ON(!task->ptrace || task->parent != current);  in ptrace_unfreeze_traced()
202 	spin_lock_irq(&task->sighand->siglock);  in ptrace_unfreeze_traced()
203 	if (task->state == __TASK_TRACED) {  in ptrace_unfreeze_traced()
204 		if (__fatal_signal_pending(task))  in ptrace_unfreeze_traced()
205 			wake_up_state(task, __TASK_TRACED);  in ptrace_unfreeze_traced()
207 			task->state = TASK_TRACED;  in ptrace_unfreeze_traced()
209 	spin_unlock_irq(&task->sighand->siglock);  in ptrace_unfreeze_traced()
281 static int __ptrace_may_access(struct task_struct *task, unsigned int mode)  in __ptrace_may_access()  argument
303 	if (same_thread_group(task, current))  in __ptrace_may_access()
321 	tcred = __task_cred(task);  in __ptrace_may_access()
345 	mm = task->mm;  in __ptrace_may_access()
351 	return security_ptrace_access_check(task, mode);  in __ptrace_may_access()
354 bool ptrace_may_access(struct task_struct *task, unsigned int mode)  in ptrace_may_access()  argument
357 	task_lock(task);  in ptrace_may_access()
358 	err = __ptrace_may_access(task, mode);  in ptrace_may_access()
359 	task_unlock(task);  in ptrace_may_access()
363 static int ptrace_attach(struct task_struct *task, long request,  in ptrace_attach()  argument
381 	audit_ptrace(task);  in ptrace_attach()
384 	if (unlikely(task->flags & PF_KTHREAD))  in ptrace_attach()
386 	if (same_thread_group(task, current))  in ptrace_attach()
395 	if (mutex_lock_interruptible(&task->signal->cred_guard_mutex))  in ptrace_attach()
398 	task_lock(task);  in ptrace_attach()
399 	retval = __ptrace_may_access(task, PTRACE_MODE_ATTACH_REALCREDS);  in ptrace_attach()
400 	task_unlock(task);  in ptrace_attach()
406 	if (unlikely(task->exit_state))  in ptrace_attach()
408 	if (task->ptrace)  in ptrace_attach()
413 	task->ptrace = flags;  in ptrace_attach()
415 	ptrace_link(task, current);  in ptrace_attach()
419 		send_sig_info(SIGSTOP, SEND_SIG_PRIV, task);  in ptrace_attach()
421 	spin_lock(&task->sighand->siglock);  in ptrace_attach()
440 	if (task_is_stopped(task) &&  in ptrace_attach()
441 	    task_set_jobctl_pending(task, JOBCTL_TRAP_STOP | JOBCTL_TRAPPING))  in ptrace_attach()
442 		signal_wake_up_state(task, __TASK_STOPPED);  in ptrace_attach()
444 	spin_unlock(&task->sighand->siglock);  in ptrace_attach()
450 	mutex_unlock(&task->signal->cred_guard_mutex);  in ptrace_attach()
460 		wait_on_bit(&task->jobctl, JOBCTL_TRAPPING_BIT, TASK_KILLABLE);  in ptrace_attach()
461 		proc_ptrace_connector(task, PTRACE_ATTACH);  in ptrace_attach()
879 static int ptrace_regset(struct task_struct *task, int req, unsigned int type,  in ptrace_regset()  argument
882 	const struct user_regset_view *view = task_user_regset_view(task);  in ptrace_regset()
894 		return copy_regset_to_user(task, view, regset_no, 0,  in ptrace_regset()
897 		return copy_regset_from_user(task, view, regset_no, 0,  in ptrace_regset()