1 files changed, 3 insertions, 0 deletions

diff --git a/net/dccp/input.c b/net/dccp/input.c
index 19d7e1dbd87e..3560a2a875a0 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -19,6 +19,9 @@
 #include "ccid.h"
 #include "dccp.h"
 
+/* rate-limit for syncs in reply to sequence-invalid packets; RFC 4340, 7.5.4 */
+int sysctl_dccp_sync_ratelimit  __read_mostly = HZ / 8;
+
 static void dccp_fin(struct sock *sk, struct sk_buff *skb)
 {
         sk->sk_shutdown |= RCV_SHUTDOWN;