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-rw-r--r--net/core/neighbour.c4
-rw-r--r--net/core/sysctl_net_core.c5
-rw-r--r--net/ipv4/devinet.c8
-rw-r--r--net/ipv4/ip_fragment.c4
-rw-r--r--net/ipv4/route.c4
-rw-r--r--net/ipv4/sysctl_net_ipv4.c3
-rw-r--r--net/ipv6/addrconf.c4
-rw-r--r--net/ipv6/icmp.c7
-rw-r--r--net/ipv6/reassembly.c4
-rw-r--r--net/ipv6/route.c4
-rw-r--r--net/ipv6/sysctl_net_ipv6.c4
-rw-r--r--net/netfilter/ipvs/ip_vs_ctl.c4
-rw-r--r--net/netfilter/ipvs/ip_vs_lblc.c7
-rw-r--r--net/netfilter/ipvs/ip_vs_lblcr.c4
-rw-r--r--net/netfilter/nf_conntrack_acct.c4
-rw-r--r--net/netfilter/nf_conntrack_ecache.c4
-rw-r--r--net/netfilter/nf_conntrack_helper.c4
-rw-r--r--net/netfilter/nf_conntrack_proto_dccp.c8
-rw-r--r--net/netfilter/nf_conntrack_standalone.c4
-rw-r--r--net/netfilter/nf_conntrack_timestamp.c4
-rw-r--r--net/unix/sysctl_net_unix.c4
-rw-r--r--net/xfrm/xfrm_sysctl.c4
22 files changed, 98 insertions, 4 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 22571488730a..f1c0c2e9cad5 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -2987,6 +2987,10 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME_MS].extra1 = dev;
}
+ /* Don't export sysctls to unprivileged users */
+ if (neigh_parms_net(p)->user_ns != &init_user_ns)
+ t->neigh_vars[0].procname = NULL;
+
snprintf(neigh_path, sizeof(neigh_path), "net/%s/neigh/%s",
p_name, dev_name_source);
t->sysctl_header =
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index a7c36845b123..d1b08045a9df 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -216,6 +216,11 @@ static __net_init int sysctl_core_net_init(struct net *net)
goto err_dup;
tbl[0].data = &net->core.sysctl_somaxconn;
+
+ /* Don't export any sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns) {
+ tbl[0].procname = NULL;
+ }
}
net->core.sysctl_hdr = register_net_sysctl(net, "net/core", tbl);
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index f6db227c1fd9..6e06e924ed99 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1815,6 +1815,10 @@ static int __devinet_sysctl_register(struct net *net, char *dev_name,
t->devinet_vars[i].extra2 = net;
}
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ t->devinet_vars[0].procname = NULL;
+
snprintf(path, sizeof(path), "net/ipv4/conf/%s", dev_name);
t->sysctl_header = register_net_sysctl(net, path, t->devinet_vars);
@@ -1900,6 +1904,10 @@ static __net_init int devinet_init_net(struct net *net)
tbl[0].data = &all->data[IPV4_DEVCONF_FORWARDING - 1];
tbl[0].extra1 = all;
tbl[0].extra2 = net;
+
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ tbl[0].procname = NULL;
#endif
}
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 448e68546827..1cf6a768cd53 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -802,6 +802,10 @@ static int __net_init ip4_frags_ns_ctl_register(struct net *net)
table[0].data = &net->ipv4.frags.high_thresh;
table[1].data = &net->ipv4.frags.low_thresh;
table[2].data = &net->ipv4.frags.timeout;
+
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
}
hdr = register_net_sysctl(net, "net/ipv4", table);
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a8c651216fa6..5b58788db863 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2493,6 +2493,10 @@ static __net_init int sysctl_route_net_init(struct net *net)
tbl = kmemdup(tbl, sizeof(ipv4_route_flush_table), GFP_KERNEL);
if (tbl == NULL)
goto err_dup;
+
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ tbl[0].procname = NULL;
}
tbl[0].extra1 = net;
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 63d4eccc674d..d84400b65049 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -883,6 +883,9 @@ static __net_init int ipv4_sysctl_init_net(struct net *net)
table[6].data =
&net->ipv4.sysctl_ping_group_range;
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
}
/*
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index cb803b7bb0d8..b24b4de5cd26 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -4735,6 +4735,10 @@ static int __addrconf_sysctl_register(struct net *net, char *dev_name,
t->addrconf_vars[i].extra2 = net;
}
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ t->addrconf_vars[0].procname = NULL;
+
snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name);
t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars);
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index b4a9fd51dae7..d77dc1e2a42b 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -967,9 +967,14 @@ struct ctl_table * __net_init ipv6_icmp_sysctl_init(struct net *net)
sizeof(ipv6_icmp_table_template),
GFP_KERNEL);
- if (table)
+ if (table) {
table[0].data = &net->ipv6.sysctl.icmpv6_time;
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
+ }
+
return table;
}
#endif
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index da8a4e301b1b..e5253ec9e0fc 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -616,6 +616,10 @@ static int __net_init ip6_frags_ns_sysctl_register(struct net *net)
table[0].data = &net->ipv6.frags.high_thresh;
table[1].data = &net->ipv6.frags.low_thresh;
table[2].data = &net->ipv6.frags.timeout;
+
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
}
hdr = register_net_sysctl(net, "net/ipv6", table);
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 11249d211ea9..021a48e8a5e2 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2989,6 +2989,10 @@ struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net)
table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires;
table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss;
table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
+
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
}
return table;
diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c
index e85c48bd404f..b06fd078e6c7 100644
--- a/net/ipv6/sysctl_net_ipv6.c
+++ b/net/ipv6/sysctl_net_ipv6.c
@@ -52,6 +52,10 @@ static int __net_init ipv6_sysctl_net_init(struct net *net)
goto out;
ipv6_table[0].data = &net->ipv6.sysctl.bindv6only;
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ ipv6_table[0].procname = NULL;
+
ipv6_route_table = ipv6_route_sysctl_init(net);
if (!ipv6_route_table)
goto out_ipv6_table;
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index c4ee43710aab..c6cebd560936 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -3699,6 +3699,10 @@ static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
if (tbl == NULL)
return -ENOMEM;
+
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ tbl[0].procname = NULL;
} else
tbl = vs_vars;
/* Initialize sysctl defaults */
diff --git a/net/netfilter/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c
index cbd37489ac77..d742aa9780ec 100644
--- a/net/netfilter/ipvs/ip_vs_lblc.c
+++ b/net/netfilter/ipvs/ip_vs_lblc.c
@@ -560,6 +560,11 @@ static int __net_init __ip_vs_lblc_init(struct net *net)
GFP_KERNEL);
if (ipvs->lblc_ctl_table == NULL)
return -ENOMEM;
+
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ ipvs->lblc_ctl_table[0].procname = NULL;
+
} else
ipvs->lblc_ctl_table = vs_vars_table;
ipvs->sysctl_lblc_expiration = DEFAULT_EXPIRATION;
@@ -569,7 +574,7 @@ static int __net_init __ip_vs_lblc_init(struct net *net)
register_net_sysctl(net, "net/ipv4/vs", ipvs->lblc_ctl_table);
if (!ipvs->lblc_ctl_header) {
if (!net_eq(net, &init_net))
- kfree(ipvs->lblc_ctl_table);
+ kfree(ipvs->lblc_ctl_table);\
return -ENOMEM;
}
diff --git a/net/netfilter/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c
index 161b67972e3f..c03b6a3ade2f 100644
--- a/net/netfilter/ipvs/ip_vs_lblcr.c
+++ b/net/netfilter/ipvs/ip_vs_lblcr.c
@@ -754,6 +754,10 @@ static int __net_init __ip_vs_lblcr_init(struct net *net)
GFP_KERNEL);
if (ipvs->lblcr_ctl_table == NULL)
return -ENOMEM;
+
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ ipvs->lblcr_ctl_table[0].procname = NULL;
} else
ipvs->lblcr_ctl_table = vs_vars_table;
ipvs->sysctl_lblcr_expiration = DEFAULT_EXPIRATION;
diff --git a/net/netfilter/nf_conntrack_acct.c b/net/netfilter/nf_conntrack_acct.c
index d61e0782a797..7df424e2d10c 100644
--- a/net/netfilter/nf_conntrack_acct.c
+++ b/net/netfilter/nf_conntrack_acct.c
@@ -69,6 +69,10 @@ static int nf_conntrack_acct_init_sysctl(struct net *net)
table[0].data = &net->ct.sysctl_acct;
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
+
net->ct.acct_sysctl_header = register_net_sysctl(net, "net/netfilter",
table);
if (!net->ct.acct_sysctl_header) {
diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c
index de9781b6464f..faa978f1714b 100644
--- a/net/netfilter/nf_conntrack_ecache.c
+++ b/net/netfilter/nf_conntrack_ecache.c
@@ -196,6 +196,10 @@ static int nf_conntrack_event_init_sysctl(struct net *net)
table[0].data = &net->ct.sysctl_events;
table[1].data = &net->ct.sysctl_events_retry_timeout;
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
+
net->ct.event_sysctl_header =
register_net_sysctl(net, "net/netfilter", table);
if (!net->ct.event_sysctl_header) {
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index c4bc637feb76..884f2b39319a 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -64,6 +64,10 @@ static int nf_conntrack_helper_init_sysctl(struct net *net)
table[0].data = &net->ct.sysctl_auto_assign_helper;
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
+
net->ct.helper_sysctl_header =
register_net_sysctl(net, "net/netfilter", table);
diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c
index 6535326cf07c..a8ae287bc7af 100644
--- a/net/netfilter/nf_conntrack_proto_dccp.c
+++ b/net/netfilter/nf_conntrack_proto_dccp.c
@@ -815,7 +815,7 @@ static struct ctl_table dccp_sysctl_table[] = {
};
#endif /* CONFIG_SYSCTL */
-static int dccp_kmemdup_sysctl_table(struct nf_proto_net *pn,
+static int dccp_kmemdup_sysctl_table(struct net *net, struct nf_proto_net *pn,
struct dccp_net *dn)
{
#ifdef CONFIG_SYSCTL
@@ -836,6 +836,10 @@ static int dccp_kmemdup_sysctl_table(struct nf_proto_net *pn,
pn->ctl_table[5].data = &dn->dccp_timeout[CT_DCCP_CLOSING];
pn->ctl_table[6].data = &dn->dccp_timeout[CT_DCCP_TIMEWAIT];
pn->ctl_table[7].data = &dn->dccp_loose;
+
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ pn->ctl_table[0].procname = NULL;
#endif
return 0;
}
@@ -857,7 +861,7 @@ static int dccp_init_net(struct net *net, u_int16_t proto)
dn->dccp_timeout[CT_DCCP_TIMEWAIT] = 2 * DCCP_MSL;
}
- return dccp_kmemdup_sysctl_table(pn, dn);
+ return dccp_kmemdup_sysctl_table(net, pn, dn);
}
static struct nf_conntrack_l4proto dccp_proto4 __read_mostly = {
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 9b3943252a5e..363285d544a1 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -489,6 +489,10 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net)
table[3].data = &net->ct.sysctl_checksum;
table[4].data = &net->ct.sysctl_log_invalid;
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
+
net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table);
if (!net->ct.sysctl_header)
goto out_unregister_netfilter;
diff --git a/net/netfilter/nf_conntrack_timestamp.c b/net/netfilter/nf_conntrack_timestamp.c
index dbb364f62d6f..7ea8026f07c9 100644
--- a/net/netfilter/nf_conntrack_timestamp.c
+++ b/net/netfilter/nf_conntrack_timestamp.c
@@ -51,6 +51,10 @@ static int nf_conntrack_tstamp_init_sysctl(struct net *net)
table[0].data = &net->ct.sysctl_tstamp;
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
+
net->ct.tstamp_sysctl_header = register_net_sysctl(net, "net/netfilter",
table);
if (!net->ct.tstamp_sysctl_header) {
diff --git a/net/unix/sysctl_net_unix.c b/net/unix/sysctl_net_unix.c
index b34b5b9792f0..8800604c93f4 100644
--- a/net/unix/sysctl_net_unix.c
+++ b/net/unix/sysctl_net_unix.c
@@ -34,6 +34,10 @@ int __net_init unix_sysctl_register(struct net *net)
if (table == NULL)
goto err_alloc;
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
+
table[0].data = &net->unx.sysctl_max_dgram_qlen;
net->unx.ctl = register_net_sysctl(net, "net/unix", table);
if (net->unx.ctl == NULL)
diff --git a/net/xfrm/xfrm_sysctl.c b/net/xfrm/xfrm_sysctl.c
index 380976f74c4c..05a6e3d9c258 100644
--- a/net/xfrm/xfrm_sysctl.c
+++ b/net/xfrm/xfrm_sysctl.c
@@ -54,6 +54,10 @@ int __net_init xfrm_sysctl_init(struct net *net)
table[2].data = &net->xfrm.sysctl_larval_drop;
table[3].data = &net->xfrm.sysctl_acq_expires;
+ /* Don't export sysctls to unprivileged users */
+ if (net->user_ns != &init_user_ns)
+ table[0].procname = NULL;
+
net->xfrm.sysctl_hdr = register_net_sysctl(net, "net/core", table);
if (!net->xfrm.sysctl_hdr)
goto out_register;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.