diff options
| -rw-r--r-- | sys/netinet/tcp_input.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index 855a07ae017..f6d9e734347 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -1,4 +1,4 @@ -/* $OpenBSD: tcp_input.c,v 1.317 2016/03/29 18:13:20 bluhm Exp $ */ +/* $OpenBSD: tcp_input.c,v 1.318 2016/03/31 13:11:14 bluhm Exp $ */ /* $NetBSD: tcp_input.c,v 1.23 1996/02/13 23:43:44 christos Exp $ */ /* @@ -3393,6 +3393,11 @@ syn_cache_insert(struct syn_cache *sc, struct tcpcb *tp) if (scp->sch_length >= tcp_syn_bucket_limit) { tcpstat.tcps_sc_bucketoverflow++; /* + * Someone might attack our bucket hash function. Reseed + * with random as soon as the passive syn cache gets empty. + */ + set->scs_use = 0; + /* * The bucket is full. Toss the oldest element in the * bucket. This will be the first entry in the bucket. */ |