2707 noinline static int copy_clone_args_from_user(struct kernel_clone_args *kargs,  in copy_clone_args_from_user()  argument
2713 	pid_t *kset_tid = kargs->set_tid;  in copy_clone_args_from_user()
2753 	*kargs = (struct kernel_clone_args){  in copy_clone_args_from_user()
2768 			(kargs->set_tid_size * sizeof(pid_t))))  in copy_clone_args_from_user()
2771 	kargs->set_tid = kset_tid;  in copy_clone_args_from_user()
2784 static inline bool clone3_stack_valid(struct kernel_clone_args *kargs)  in clone3_stack_valid()  argument
2786 	if (kargs->stack == 0) {  in clone3_stack_valid()
2787 		if (kargs->stack_size > 0)  in clone3_stack_valid()
2790 		if (kargs->stack_size == 0)  in clone3_stack_valid()
2793 		if (!access_ok((void __user *)kargs->stack, kargs->stack_size))  in clone3_stack_valid()
2797 		kargs->stack += kargs->stack_size;  in clone3_stack_valid()
2804 static bool clone3_args_valid(struct kernel_clone_args *kargs)  in clone3_args_valid()  argument
2807 	if (kargs->flags &  in clone3_args_valid()
2815 	if (kargs->flags & (CLONE_DETACHED | CSIGNAL))  in clone3_args_valid()
2818 	if ((kargs->flags & (CLONE_SIGHAND | CLONE_CLEAR_SIGHAND)) ==  in clone3_args_valid()
2822 	if ((kargs->flags & (CLONE_THREAD | CLONE_PARENT)) &&  in clone3_args_valid()
2823 	    kargs->exit_signal)  in clone3_args_valid()
2826 	if (!clone3_stack_valid(kargs))  in clone3_args_valid()
2847 	struct kernel_clone_args kargs;  in SYSCALL_DEFINE2()  local
2850 	kargs.set_tid = set_tid;  in SYSCALL_DEFINE2()
2852 	err = copy_clone_args_from_user(&kargs, uargs, size);  in SYSCALL_DEFINE2()
2856 	if (!clone3_args_valid(&kargs))  in SYSCALL_DEFINE2()
2859 	return kernel_clone(&kargs);  in SYSCALL_DEFINE2()