2579 noinline static int copy_clone_args_from_user(struct kernel_clone_args *kargs,  in copy_clone_args_from_user()  argument
2585 	pid_t *kset_tid = kargs->set_tid;  in copy_clone_args_from_user()
2625 	*kargs = (struct kernel_clone_args){  in copy_clone_args_from_user()
2640 			(kargs->set_tid_size * sizeof(pid_t))))  in copy_clone_args_from_user()
2643 	kargs->set_tid = kset_tid;  in copy_clone_args_from_user()
2656 static inline bool clone3_stack_valid(struct kernel_clone_args *kargs)  in clone3_stack_valid()  argument
2658 	if (kargs->stack == 0) {  in clone3_stack_valid()
2659 		if (kargs->stack_size > 0)  in clone3_stack_valid()
2662 		if (kargs->stack_size == 0)  in clone3_stack_valid()
2665 		if (!access_ok((void __user *)kargs->stack, kargs->stack_size))  in clone3_stack_valid()
2669 		kargs->stack += kargs->stack_size;  in clone3_stack_valid()
2676 static bool clone3_args_valid(struct kernel_clone_args *kargs)  in clone3_args_valid()  argument
2679 	if (kargs->flags &  in clone3_args_valid()
2687 	if (kargs->flags & (CLONE_DETACHED | CSIGNAL))  in clone3_args_valid()
2690 	if ((kargs->flags & (CLONE_SIGHAND | CLONE_CLEAR_SIGHAND)) ==  in clone3_args_valid()
2694 	if ((kargs->flags & (CLONE_THREAD | CLONE_PARENT)) &&  in clone3_args_valid()
2695 	    kargs->exit_signal)  in clone3_args_valid()
2698 	if (!clone3_stack_valid(kargs))  in clone3_args_valid()
2719 	struct kernel_clone_args kargs;  in SYSCALL_DEFINE2()  local
2722 	kargs.set_tid = set_tid;  in SYSCALL_DEFINE2()
2724 	err = copy_clone_args_from_user(&kargs, uargs, size);  in SYSCALL_DEFINE2()
2728 	if (!clone3_args_valid(&kargs))  in SYSCALL_DEFINE2()
2731 	return kernel_clone(&kargs);  in SYSCALL_DEFINE2()