netfilter: Use flowi4 and flowi6 in xt_TCPMSS

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 5 deletions

diff --git a/net/netfilter/xt_TCPMSS.c b/net/netfilter/xt_TCPMSS.c
index eb81c380da1b..6e6b46cb1db9 100644
--- a/net/netfilter/xt_TCPMSS.c
+++ b/net/netfilter/xt_TCPMSS.c
@@ -148,16 +148,21 @@ tcpmss_mangle_packet(struct sk_buff *skb,
 static u_int32_t tcpmss_reverse_mtu(const struct sk_buff *skb,
                                     unsigned int family)
 {
-        struct flowi fl = {};
+        struct flowi fl;
         const struct nf_afinfo *ai;
         struct rtable *rt = NULL;
         u_int32_t mtu     = ~0U;
 
-        if (family == PF_INET)
-                fl.fl4_dst = ip_hdr(skb)->saddr;
-        else
-                fl.fl6_dst = ipv6_hdr(skb)->saddr;
+        if (family == PF_INET) {
+                struct flowi4 *fl4 = &fl.u.ip4;
+                memset(fl4, 0, sizeof(*fl4));
+                fl4->daddr = ip_hdr(skb)->saddr;
+        } else {
+                struct flowi6 *fl6 = &fl.u.ip6;
 
+                memset(fl6, 0, sizeof(*fl6));
+                ipv6_addr_copy(&fl6->daddr, &ipv6_hdr(skb)->saddr);
+        }
         rcu_read_lock();
         ai = nf_get_afinfo(family);
         if (ai != NULL)