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-rw-r--r--net/ipv4/af_inet.c2
-rw-r--r--net/ipv4/inet_hashtables.c10
2 files changed, 9 insertions, 3 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 235d36afece3..6ad0f7a711c9 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1595,7 +1595,7 @@ static __net_init int inet_init_net(struct net *net)
*/
seqlock_init(&net->ipv4.ip_local_ports.lock);
net->ipv4.ip_local_ports.range[0] = 32768;
- net->ipv4.ip_local_ports.range[1] = 61000;
+ net->ipv4.ip_local_ports.range[1] = 60999;
seqlock_init(&net->ipv4.ping_group_range.lock);
/*
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 185efef0f125..1b336dc179f8 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -502,8 +502,14 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
inet_get_local_port_range(net, &low, &high);
remaining = (high - low) + 1;
+ /* By starting with offset being an even number,
+ * we tend to leave about 50% of ports for other uses,
+ * like bind(0).
+ */
+ offset &= ~1;
+
local_bh_disable();
- for (i = 1; i <= remaining; i++) {
+ for (i = 0; i < remaining; i++) {
port = low + (i + offset) % remaining;
if (inet_is_local_reserved_port(net, port))
continue;
@@ -547,7 +553,7 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
return -EADDRNOTAVAIL;
ok:
- hint += i;
+ hint += (i + 2) & ~1;
/* Head lock still held and bh's disabled */
inet_bind_hash(sk, tb, port);