netfilter: nf_nat: use hash random for bysource hash

Use nf_conntrack_hash_rnd in NAT bysource hash to avoid hash chain attacks.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv4/netfilter/nf_nat_core.c b/net/ipv4/netfilter/nf_nat_core.c
index 58ab7a4611dd..76600f8d434b 100644
--- a/net/ipv4/netfilter/nf_nat_core.c
+++ b/net/ipv4/netfilter/nf_nat_core.c
@@ -57,7 +57,7 @@ hash_by_src(const struct net *net, u16 zone,
         /* Original src, to ensure we map it consistently if poss. */
         hash = jhash_3words((__force u32)tuple->src.u3.ip,
                             (__force u32)tuple->src.u.all ^ zone,
-                            tuple->dst.protonum, 0);
+                            tuple->dst.protonum, nf_conntrack_hash_rnd);
         return ((u64)hash * net->ipv4.nat_htable_size) >> 32;
 }