Merge: netfilter: Use flowlabel flow key when re-routing mangled packets

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/4951

JIRA: https://issues.redhat.com/browse/RHEL-40213
Upstream Status: commit 6f8f132
    
Signed-off-by: Florian Westphal <fwestpha@redhat.com>

Approved-by: Xin Long <lxin@redhat.com>
Approved-by: Antoine Tenart <atenart@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Lucas Zampieri <lzampier@redhat.com>

Author: zampierilucas

net/ipv6/netfilter.c

@@ -36,6 +36,7 @@ int ip6_route_me_harder(struct net *net, struct sock *sk_partial, struct sk_buff
 		.flowi6_uid = sock_net_uid(net, sk),
 		.daddr = iph->daddr,
 		.saddr = iph->saddr,
+		.flowlabel = ip6_flowinfo(iph),
 	};
 	int err;