diff
< 	struct rt6_info *rt = NULL;
< 	...
< 	if (rt != net->ipv6.ip6_null_entry) {
---
> 	struct rt6_info *rt = INIT_RT_VALUE; // INIT_RT_VALUE is a defined non-NULL value
> 	...
> 	if (rt != INIT_RT_VALUE && rt != net->ipv6.ip6_null_entry) {
