173 static bool looks_like_a_spurious_pid(struct task_struct *task)  in looks_like_a_spurious_pid()  argument
175 	if (task->exit_code != ((PTRACE_EVENT_EXEC << 8) | SIGTRAP))  in looks_like_a_spurious_pid()
178 	if (task_pid_vnr(task) == task->ptrace_message)  in looks_like_a_spurious_pid()
194 static bool ptrace_freeze_traced(struct task_struct *task)  in ptrace_freeze_traced()  argument
199 	if (task->jobctl & JOBCTL_LISTENING)  in ptrace_freeze_traced()
202 	spin_lock_irq(&task->sighand->siglock);  in ptrace_freeze_traced()
203 	if (task_is_traced(task) && !looks_like_a_spurious_pid(task) &&  in ptrace_freeze_traced()
204 	    !__fatal_signal_pending(task)) {  in ptrace_freeze_traced()
205 		task->jobctl |= JOBCTL_PTRACE_FROZEN;  in ptrace_freeze_traced()
208 	spin_unlock_irq(&task->sighand->siglock);  in ptrace_freeze_traced()
213 static void ptrace_unfreeze_traced(struct task_struct *task)  in ptrace_unfreeze_traced()  argument
222 	if (lock_task_sighand(task, &flags)) {  in ptrace_unfreeze_traced()
223 		task->jobctl &= ~JOBCTL_PTRACE_FROZEN;  in ptrace_unfreeze_traced()
224 		if (__fatal_signal_pending(task)) {  in ptrace_unfreeze_traced()
225 			task->jobctl &= ~JOBCTL_TRACED;  in ptrace_unfreeze_traced()
226 			wake_up_state(task, __TASK_TRACED);  in ptrace_unfreeze_traced()
228 		unlock_task_sighand(task, &flags);  in ptrace_unfreeze_traced()
286 static int __ptrace_may_access(struct task_struct *task, unsigned int mode)  in __ptrace_may_access()  argument
308 	if (same_thread_group(task, current))  in __ptrace_may_access()
326 	tcred = __task_cred(task);  in __ptrace_may_access()
350 	mm = task->mm;  in __ptrace_may_access()
356 	return security_ptrace_access_check(task, mode);  in __ptrace_may_access()
359 bool ptrace_may_access(struct task_struct *task, unsigned int mode)  in ptrace_may_access()  argument
362 	task_lock(task);  in ptrace_may_access()
363 	err = __ptrace_may_access(task, mode);  in ptrace_may_access()
364 	task_unlock(task);  in ptrace_may_access()
388 static int ptrace_attach(struct task_struct *task, long request,  in ptrace_attach()  argument
414 	audit_ptrace(task);  in ptrace_attach()
417 	if (unlikely(task->flags & PF_KTHREAD))  in ptrace_attach()
419 	if (same_thread_group(task, current))  in ptrace_attach()
428 	if (mutex_lock_interruptible(&task->signal->cred_guard_mutex))  in ptrace_attach()
431 	task_lock(task);  in ptrace_attach()
432 	retval = __ptrace_may_access(task, PTRACE_MODE_ATTACH_REALCREDS);  in ptrace_attach()
433 	task_unlock(task);  in ptrace_attach()
439 	if (unlikely(task->exit_state))  in ptrace_attach()
441 	if (task->ptrace)  in ptrace_attach()
444 	task->ptrace = flags;  in ptrace_attach()
446 	ptrace_link(task, current);  in ptrace_attach()
450 		send_sig_info(SIGSTOP, SEND_SIG_PRIV, task);  in ptrace_attach()
452 	spin_lock(&task->sighand->siglock);  in ptrace_attach()
471 	if (task_is_stopped(task) &&  in ptrace_attach()
472 	    task_set_jobctl_pending(task, JOBCTL_TRAP_STOP | JOBCTL_TRAPPING)) {  in ptrace_attach()
473 		task->jobctl &= ~JOBCTL_STOPPED;  in ptrace_attach()
474 		signal_wake_up_state(task, __TASK_STOPPED);  in ptrace_attach()
477 	spin_unlock(&task->sighand->siglock);  in ptrace_attach()
483 	mutex_unlock(&task->signal->cred_guard_mutex);  in ptrace_attach()
493 		wait_on_bit(&task->jobctl, JOBCTL_TRAPPING_BIT, TASK_KILLABLE);  in ptrace_attach()
494 		proc_ptrace_connector(task, PTRACE_ATTACH);  in ptrace_attach()
811 static long ptrace_get_rseq_configuration(struct task_struct *task,  in ptrace_get_rseq_configuration()  argument
815 		.rseq_abi_pointer = (u64)(uintptr_t)task->rseq,  in ptrace_get_rseq_configuration()
816 		.rseq_abi_size = sizeof(*task->rseq),  in ptrace_get_rseq_configuration()
817 		.signature = task->rseq_sig,  in ptrace_get_rseq_configuration()
907 static int ptrace_regset(struct task_struct *task, int req, unsigned int type,  in ptrace_regset()  argument
910 	const struct user_regset_view *view = task_user_regset_view(task);  in ptrace_regset()
922 		return copy_regset_to_user(task, view, regset_no, 0,  in ptrace_regset()
925 		return copy_regset_from_user(task, view, regset_no, 0,  in ptrace_regset()