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-rw-r--r--net/dccp/input.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/net/dccp/input.c b/net/dccp/input.c
index 3c4cbff82e95..ce8396b126d2 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -136,8 +136,15 @@ static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
DCCP_PKT_WITHOUT_ACK_SEQ))
dp->dccps_gar = DCCP_SKB_CB(skb)->dccpd_ack_seq;
} else {
- LIMIT_NETDEBUG(KERN_WARNING "DCCP: Step 6 failed, "
- "sending SYNC...\n");
+ LIMIT_NETDEBUG(KERN_WARNING "DCCP: Step 6 failed for %s packet, "
+ "(LSWL(%llu) <= P.seqno(%llu) <= S.SWH(%llu)) and "
+ "(P.ackno %s or LAWL(%llu) <= P.ackno(%llu) <= S.AWH(%llu), "
+ "sending SYNC...\n",
+ dccp_packet_name(dh->dccph_type),
+ lswl, DCCP_SKB_CB(skb)->dccpd_seq, dp->dccps_swh,
+ (DCCP_SKB_CB(skb)->dccpd_ack_seq ==
+ DCCP_PKT_WITHOUT_ACK_SEQ) ? "doesn't exist" : "exists",
+ lawl, DCCP_SKB_CB(skb)->dccpd_ack_seq, dp->dccps_awh);
dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq, DCCP_PKT_SYNC);
return -1;
}