[TCP]: Fix zero port problem in IPv6

When we link a socket into the hash table, we need to make sure that we
set the num/port fields so that it shows us with a non-zero port value
in proc/netlink and on the wire.  This code and comment is copied over
from the IPv4 stack as is.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 5 insertions, 1 deletions

diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index 4154f3a8b6cf..bb8ffb8a14c5 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -87,7 +87,7 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row,
                                      struct inet_timewait_sock **twp)
 {
         struct inet_hashinfo *hinfo = death_row->hashinfo;
-        const struct inet_sock *inet = inet_sk(sk);
+        struct inet_sock *inet = inet_sk(sk);
         const struct ipv6_pinfo *np = inet6_sk(sk);
         const struct in6_addr *daddr = &np->rcv_saddr;
         const struct in6_addr *saddr = &np->daddr;
@@ -129,6 +129,10 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row,
         }
 
 unique:
+        /* Must record num and sport now. Otherwise we will see
+         * in hash table socket with a funny identity. */
+        inet->num = lport;
+        inet->sport = htons(lport);
         BUG_TRAP(sk_unhashed(sk));
         __sk_add_node(sk, &head->chain);
         sk->sk_hash = hash;