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| author | Michal Tesar <mtesar@redhat.com> | 2013-07-19 14:09:01 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-11 15:38:44 -0700 |
| commit | f31dfea03c3500dbf43d29c12f4bfcefc87a6557 (patch) | |
| tree | fa37d46bb3a9ad8c79067b21168e94038f5821b5 | |
| parent | c062773fe4a98d935335b75e75c0d1a14a29b680 (diff) | |
| download | lwn-f31dfea03c3500dbf43d29c12f4bfcefc87a6557.tar.gz lwn-f31dfea03c3500dbf43d29c12f4bfcefc87a6557.zip | |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index bf7a604c695c..086c97327b9b 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -34,6 +34,8 @@ static int tcp_adv_win_scale_min = -31; static int tcp_adv_win_scale_max = 31; static int ip_ttl_min = 1; static int ip_ttl_max = 255; +static int tcp_syn_retries_min = 1; +static int tcp_syn_retries_max = MAX_TCP_SYNCNT; static int ip_ping_group_range_min[] = { 0, 0 }; static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; @@ -276,7 +278,9 @@ static struct ctl_table ipv4_table[] = { .data = &sysctl_tcp_syn_retries, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = proc_dointvec + .proc_handler = proc_dointvec_minmax, + .extra1 = &tcp_syn_retries_min, + .extra2 = &tcp_syn_retries_max }, { .procname = "tcp_synack_retries", |