[PATCH net] sit: update frag_off info

[Hangbin Liu]

After parsing the sit netlink change info, we forget to update frag_off in
ipip6_tunnel_update(). Fix it by assigning frag_off with new value.

Fixes: f37234160233 ("sit: add support of link creation via rtnl")
Reported-by: Jianlin Shi <ji...@redhat.com>
Signed-off-by: Hangbin Liu <liuhang...@gmail.com>
---
 net/ipv6/sit.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index d60ddcb..d7dc23c 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -1098,6 +1098,7 @@ static void ipip6_tunnel_update(struct ip_tunnel *t, 
struct ip_tunnel_parm *p,
        ipip6_tunnel_link(sitn, t);
        t->parms.iph.ttl = p->iph.ttl;
        t->parms.iph.tos = p->iph.tos;
+       t->parms.iph.frag_off = p->iph.frag_off;
        if (t->parms.link != p->link || t->fwmark != fwmark) {
                t->parms.link = p->link;
                t->fwmark = fwmark;
-- 
2.5.5