1 files changed, 19 insertions, 6 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 3c6c7d7a7b0a..1bdb1bd22134 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2309,12 +2309,25 @@ static void DBGUNDO(struct sock *sk, const char *msg)
         struct tcp_sock *tp = tcp_sk(sk);
         struct inet_sock *inet = inet_sk(sk);
 
-        printk(KERN_DEBUG "Undo %s " NIPQUAD_FMT "/%u c%u l%u ss%u/%u p%u\n",
-               msg,
-               NIPQUAD(inet->daddr), ntohs(inet->dport),
-               tp->snd_cwnd, tcp_left_out(tp),
-               tp->snd_ssthresh, tp->prior_ssthresh,
-               tp->packets_out);
+        if (sk->sk_family == AF_INET) {
+                printk(KERN_DEBUG "Undo %s " NIPQUAD_FMT "/%u c%u l%u ss%u/%u p%u\n",
+                       msg,
+                       NIPQUAD(inet->daddr), ntohs(inet->dport),
+                       tp->snd_cwnd, tcp_left_out(tp),
+                       tp->snd_ssthresh, tp->prior_ssthresh,
+                       tp->packets_out);
+        }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+        else if (sk->sk_family == AF_INET6) {
+                struct ipv6_pinfo *np = inet6_sk(sk);
+                printk(KERN_DEBUG "Undo %s " NIP6_FMT "/%u c%u l%u ss%u/%u p%u\n",
+                       msg,
+                       NIP6(np->daddr), ntohs(inet->dport),
+                       tp->snd_cwnd, tcp_left_out(tp),
+                       tp->snd_ssthresh, tp->prior_ssthresh,
+                       tp->packets_out);
+        }
+#endif
 }
 #else
 #define DBGUNDO(x...) do { } while (0)