122 static bool ptrace_freeze_traced(struct task_struct *task)  in ptrace_freeze_traced()  argument
127 	if (task->jobctl & JOBCTL_LISTENING)  in ptrace_freeze_traced()
130 	spin_lock_irq(&task->sighand->siglock);  in ptrace_freeze_traced()
131 	if (task_is_traced(task) && !__fatal_signal_pending(task)) {  in ptrace_freeze_traced()
132 		task->state = __TASK_TRACED;  in ptrace_freeze_traced()
135 	spin_unlock_irq(&task->sighand->siglock);  in ptrace_freeze_traced()
140 static void ptrace_unfreeze_traced(struct task_struct *task)  in ptrace_unfreeze_traced()  argument
142 	if (task->state != __TASK_TRACED)  in ptrace_unfreeze_traced()
145 	WARN_ON(!task->ptrace || task->parent != current);  in ptrace_unfreeze_traced()
147 	spin_lock_irq(&task->sighand->siglock);  in ptrace_unfreeze_traced()
148 	if (__fatal_signal_pending(task))  in ptrace_unfreeze_traced()
149 		wake_up_state(task, __TASK_TRACED);  in ptrace_unfreeze_traced()
151 		task->state = TASK_TRACED;  in ptrace_unfreeze_traced()
152 	spin_unlock_irq(&task->sighand->siglock);  in ptrace_unfreeze_traced()
219 static int __ptrace_may_access(struct task_struct *task, unsigned int mode)  in __ptrace_may_access()  argument
241 	if (same_thread_group(task, current))  in __ptrace_may_access()
259 	tcred = __task_cred(task);  in __ptrace_may_access()
274 	if (task->mm)  in __ptrace_may_access()
275 		dumpable = get_dumpable(task->mm);  in __ptrace_may_access()
278 	    !ptrace_has_cap(__task_cred(task)->user_ns, mode)) {  in __ptrace_may_access()
284 	return security_ptrace_access_check(task, mode);  in __ptrace_may_access()
287 bool ptrace_may_access(struct task_struct *task, unsigned int mode)  in ptrace_may_access()  argument
290 	task_lock(task);  in ptrace_may_access()
291 	err = __ptrace_may_access(task, mode);  in ptrace_may_access()
292 	task_unlock(task);  in ptrace_may_access()
296 static int ptrace_attach(struct task_struct *task, long request,  in ptrace_attach()  argument
314 	audit_ptrace(task);  in ptrace_attach()
317 	if (unlikely(task->flags & PF_KTHREAD))  in ptrace_attach()
319 	if (same_thread_group(task, current))  in ptrace_attach()
328 	if (mutex_lock_interruptible(&task->signal->cred_guard_mutex))  in ptrace_attach()
331 	task_lock(task);  in ptrace_attach()
332 	retval = __ptrace_may_access(task, PTRACE_MODE_ATTACH_REALCREDS);  in ptrace_attach()
333 	task_unlock(task);  in ptrace_attach()
339 	if (unlikely(task->exit_state))  in ptrace_attach()
341 	if (task->ptrace)  in ptrace_attach()
347 	if (ns_capable(__task_cred(task)->user_ns, CAP_SYS_PTRACE))  in ptrace_attach()
350 	task->ptrace = flags;  in ptrace_attach()
352 	__ptrace_link(task, current);  in ptrace_attach()
356 		send_sig_info(SIGSTOP, SEND_SIG_FORCED, task);  in ptrace_attach()
358 	spin_lock(&task->sighand->siglock);  in ptrace_attach()
377 	if (task_is_stopped(task) &&  in ptrace_attach()
378 	    task_set_jobctl_pending(task, JOBCTL_TRAP_STOP | JOBCTL_TRAPPING))  in ptrace_attach()
379 		signal_wake_up_state(task, __TASK_STOPPED);  in ptrace_attach()
381 	spin_unlock(&task->sighand->siglock);  in ptrace_attach()
387 	mutex_unlock(&task->signal->cred_guard_mutex);  in ptrace_attach()
390 		wait_on_bit(&task->jobctl, JOBCTL_TRAPPING_BIT,  in ptrace_attach()
392 		proc_ptrace_connector(task, PTRACE_ATTACH);  in ptrace_attach()
792 static int ptrace_regset(struct task_struct *task, int req, unsigned int type,  in ptrace_regset()  argument
795 	const struct user_regset_view *view = task_user_regset_view(task);  in ptrace_regset()
807 		return copy_regset_to_user(task, view, regset_no, 0,  in ptrace_regset()
810 		return copy_regset_from_user(task, view, regset_no, 0,  in ptrace_regset()