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authorMichal Tesar <mtesar@redhat.com>2013-07-19 14:09:01 +0200
committerWilly Tarreau <w@1wt.eu>2014-05-19 07:53:48 +0200
commitb7c9e4ee1068391f547f3eaf0b6646115e300bb5 (patch)
treeb0246a0e4d8c997c71ce0a992d54a08496a35b8d
parent8c46d377c799adb4c8dbfed9cd1156d228298ff9 (diff)
sysctl net: Keep tcp_syn_retries inside the boundary
[ Upstream commit 651e92716aaae60fc41b9652f54cb6803896e0da ] Limit the min/max value passed to the /proc/sys/net/ipv4/tcp_syn_retries. Signed-off-by: Michal Tesar <mtesar@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Willy Tarreau <w@1wt.eu>
-rw-r--r--net/ipv4/sysctl_net_ipv4.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 2dcf04d9b005..910fa546f820 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -23,6 +23,8 @@
static int zero;
static int tcp_retr1_max = 255;
+static int tcp_syn_retries_min = 1;
+static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
static int ip_local_port_range_min[] = { 1, 1 };
static int ip_local_port_range_max[] = { 65535, 65535 };
@@ -237,7 +239,9 @@ static struct ctl_table ipv4_table[] = {
.data = &ipv4_config.no_pmtu_disc,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &tcp_syn_retries_min,
+ .extra2 = &tcp_syn_retries_max
},
{
.ctl_name = NET_IPV4_NONLOCAL_BIND,