2405 bool legacy_clone_args_valid(const struct kernel_clone_args *kargs)  in legacy_clone_args_valid()  argument
2408 	if ((kargs->flags & CLONE_PIDFD) &&  in legacy_clone_args_valid()
2409 	    (kargs->flags & CLONE_PARENT_SETTID))  in legacy_clone_args_valid()
2526 noinline static int copy_clone_args_from_user(struct kernel_clone_args *kargs,  in copy_clone_args_from_user()  argument
2550 	*kargs = (struct kernel_clone_args){  in copy_clone_args_from_user()
2572 static inline bool clone3_stack_valid(struct kernel_clone_args *kargs)  in clone3_stack_valid()  argument
2574 	if (kargs->stack == 0) {  in clone3_stack_valid()
2575 		if (kargs->stack_size > 0)  in clone3_stack_valid()
2578 		if (kargs->stack_size == 0)  in clone3_stack_valid()
2581 		if (!access_ok((void __user *)kargs->stack, kargs->stack_size))  in clone3_stack_valid()
2585 		kargs->stack += kargs->stack_size;  in clone3_stack_valid()
2592 static bool clone3_args_valid(struct kernel_clone_args *kargs)  in clone3_args_valid()  argument
2598 	if (kargs->flags & ~CLONE_LEGACY_FLAGS)  in clone3_args_valid()
2605 	if (kargs->flags & (CLONE_DETACHED | CSIGNAL))  in clone3_args_valid()
2608 	if ((kargs->flags & (CLONE_THREAD | CLONE_PARENT)) &&  in clone3_args_valid()
2609 	    kargs->exit_signal)  in clone3_args_valid()
2612 	if (!clone3_stack_valid(kargs))  in clone3_args_valid()
2633 	struct kernel_clone_args kargs;  in SYSCALL_DEFINE2()  local
2635 	err = copy_clone_args_from_user(&kargs, uargs, size);  in SYSCALL_DEFINE2()
2639 	if (!clone3_args_valid(&kargs))  in SYSCALL_DEFINE2()
2642 	return _do_fork(&kargs);  in SYSCALL_DEFINE2()