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Commit 249fab77 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net: add limits to ip_default_ttl 



ip_default_ttl should be between 1 and 255

Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8c4877a4

net/ipv4/sysctl_net_ipv4.c

+5 −2
Original line number Diff line number Diff line
@@ -28,6 +28,8 @@ static int ip_local_port_range_min[] = { 1, 1 }; 
static int ip_local_port_range_max[] = { 65535, 65535 };

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;



/* Update system visible IP port range */

static void set_local_port_range(int range[2])
@@ -155,8 +157,9 @@ static struct ctl_table ipv4_table[] = { 
		.data		= &sysctl_ip_default_ttl,

		.maxlen		= sizeof(int),

		.mode		= 0644,

		.proc_handler	= proc_dointvec,

		.extra2		= &init_net,

		.proc_handler	= proc_dointvec_minmax,

		.extra1		= &ip_ttl_min,

		.extra2		= &ip_ttl_max,

	},

	{

		.procname	= "ip_no_pmtu_disc",