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Diffstat (limited to 'pkgs/patches-linux-5.15/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch')
-rw-r--r--pkgs/patches-linux-5.15/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch263
1 files changed, 263 insertions, 0 deletions
diff --git a/pkgs/patches-linux-5.15/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch b/pkgs/patches-linux-5.15/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch
new file mode 100644
index 0000000..6896076
--- /dev/null
+++ b/pkgs/patches-linux-5.15/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch
@@ -0,0 +1,263 @@
+From: Jonas Gorski <jogo@openwrt.org>
+Subject: ipv6: allow rejecting with "source address failed policy"
+
+RFC6204 L-14 requires rejecting traffic from invalid addresses with
+ICMPv6 Destination Unreachable, Code 5 (Source address failed ingress/
+egress policy) on the LAN side, so add an appropriate rule for that.
+
+Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+---
+ include/net/netns/ipv6.h | 1 +
+ include/uapi/linux/fib_rules.h | 4 +++
+ include/uapi/linux/rtnetlink.h | 1 +
+ net/ipv4/fib_semantics.c | 4 +++
+ net/ipv4/fib_trie.c | 1 +
+ net/ipv4/ipmr.c | 1 +
+ net/ipv6/fib6_rules.c | 4 +++
+ net/ipv6/ip6mr.c | 2 ++
+ net/ipv6/route.c | 58 +++++++++++++++++++++++++++++++++++++++++-
+ 9 files changed, 75 insertions(+), 1 deletion(-)
+
+--- a/include/net/netns/ipv6.h
++++ b/include/net/netns/ipv6.h
+@@ -85,6 +85,7 @@ struct netns_ipv6 {
+ unsigned int fib6_routes_require_src;
+ #endif
+ struct rt6_info *ip6_prohibit_entry;
++ struct rt6_info *ip6_policy_failed_entry;
+ struct rt6_info *ip6_blk_hole_entry;
+ struct fib6_table *fib6_local_tbl;
+ struct fib_rules_ops *fib6_rules_ops;
+--- a/include/uapi/linux/fib_rules.h
++++ b/include/uapi/linux/fib_rules.h
+@@ -82,6 +82,10 @@ enum {
+ FR_ACT_BLACKHOLE, /* Drop without notification */
+ FR_ACT_UNREACHABLE, /* Drop with ENETUNREACH */
+ FR_ACT_PROHIBIT, /* Drop with EACCES */
++ FR_ACT_RES9,
++ FR_ACT_RES10,
++ FR_ACT_RES11,
++ FR_ACT_POLICY_FAILED, /* Drop with EACCES */
+ __FR_ACT_MAX,
+ };
+
+--- a/include/uapi/linux/rtnetlink.h
++++ b/include/uapi/linux/rtnetlink.h
+@@ -256,6 +256,7 @@ enum {
+ RTN_THROW, /* Not in this table */
+ RTN_NAT, /* Translate this address */
+ RTN_XRESOLVE, /* Use external resolver */
++ RTN_POLICY_FAILED, /* Failed ingress/egress policy */
+ __RTN_MAX
+ };
+
+--- a/net/ipv4/fib_semantics.c
++++ b/net/ipv4/fib_semantics.c
+@@ -142,6 +142,10 @@ const struct fib_prop fib_props[RTN_MAX
+ .error = -EINVAL,
+ .scope = RT_SCOPE_NOWHERE,
+ },
++ [RTN_POLICY_FAILED] = {
++ .error = -EACCES,
++ .scope = RT_SCOPE_UNIVERSE,
++ },
+ };
+
+ static void rt_fibinfo_free(struct rtable __rcu **rtp)
+--- a/net/ipv4/fib_trie.c
++++ b/net/ipv4/fib_trie.c
+@@ -2767,6 +2767,7 @@ static const char *const rtn_type_names[
+ [RTN_THROW] = "THROW",
+ [RTN_NAT] = "NAT",
+ [RTN_XRESOLVE] = "XRESOLVE",
++ [RTN_POLICY_FAILED] = "POLICY_FAILED",
+ };
+
+ static inline const char *rtn_type(char *buf, size_t len, unsigned int t)
+--- a/net/ipv4/ipmr.c
++++ b/net/ipv4/ipmr.c
+@@ -175,6 +175,7 @@ static int ipmr_rule_action(struct fib_r
+ case FR_ACT_UNREACHABLE:
+ return -ENETUNREACH;
+ case FR_ACT_PROHIBIT:
++ case FR_ACT_POLICY_FAILED:
+ return -EACCES;
+ case FR_ACT_BLACKHOLE:
+ default:
+--- a/net/ipv6/fib6_rules.c
++++ b/net/ipv6/fib6_rules.c
+@@ -220,6 +220,10 @@ static int __fib6_rule_action(struct fib
+ err = -EACCES;
+ rt = net->ipv6.ip6_prohibit_entry;
+ goto discard_pkt;
++ case FR_ACT_POLICY_FAILED:
++ err = -EACCES;
++ rt = net->ipv6.ip6_policy_failed_entry;
++ goto discard_pkt;
+ }
+
+ tb_id = fib_rule_get_table(rule, arg);
+--- a/net/ipv6/ip6mr.c
++++ b/net/ipv6/ip6mr.c
+@@ -163,6 +163,8 @@ static int ip6mr_rule_action(struct fib_
+ return -ENETUNREACH;
+ case FR_ACT_PROHIBIT:
+ return -EACCES;
++ case FR_ACT_POLICY_FAILED:
++ return -EACCES;
+ case FR_ACT_BLACKHOLE:
+ default:
+ return -EINVAL;
+--- a/net/ipv6/route.c
++++ b/net/ipv6/route.c
+@@ -97,6 +97,8 @@ static int ip6_pkt_discard(struct sk_bu
+ static int ip6_pkt_discard_out(struct net *net, struct sock *sk, struct sk_buff *skb);
+ static int ip6_pkt_prohibit(struct sk_buff *skb);
+ static int ip6_pkt_prohibit_out(struct net *net, struct sock *sk, struct sk_buff *skb);
++static int ip6_pkt_policy_failed(struct sk_buff *skb);
++static int ip6_pkt_policy_failed_out(struct net *net, struct sock *sk, struct sk_buff *skb);
+ static void ip6_link_failure(struct sk_buff *skb);
+ static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk,
+ struct sk_buff *skb, u32 mtu,
+@@ -312,6 +314,18 @@ static const struct rt6_info ip6_prohibi
+ .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
+ };
+
++static const struct rt6_info ip6_policy_failed_entry_template = {
++ .dst = {
++ .__refcnt = ATOMIC_INIT(1),
++ .__use = 1,
++ .obsolete = DST_OBSOLETE_FORCE_CHK,
++ .error = -EACCES,
++ .input = ip6_pkt_policy_failed,
++ .output = ip6_pkt_policy_failed_out,
++ },
++ .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
++};
++
+ static const struct rt6_info ip6_blk_hole_entry_template = {
+ .dst = {
+ .__refcnt = ATOMIC_INIT(1),
+@@ -1033,6 +1047,7 @@ static const int fib6_prop[RTN_MAX + 1]
+ [RTN_BLACKHOLE] = -EINVAL,
+ [RTN_UNREACHABLE] = -EHOSTUNREACH,
+ [RTN_PROHIBIT] = -EACCES,
++ [RTN_POLICY_FAILED] = -EACCES,
+ [RTN_THROW] = -EAGAIN,
+ [RTN_NAT] = -EINVAL,
+ [RTN_XRESOLVE] = -EINVAL,
+@@ -1068,6 +1083,10 @@ static void ip6_rt_init_dst_reject(struc
+ rt->dst.output = ip6_pkt_prohibit_out;
+ rt->dst.input = ip6_pkt_prohibit;
+ break;
++ case RTN_POLICY_FAILED:
++ rt->dst.output = ip6_pkt_policy_failed_out;
++ rt->dst.input = ip6_pkt_policy_failed;
++ break;
+ case RTN_THROW:
+ case RTN_UNREACHABLE:
+ default:
+@@ -4560,6 +4579,17 @@ static int ip6_pkt_prohibit_out(struct n
+ return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
+ }
+
++static int ip6_pkt_policy_failed(struct sk_buff *skb)
++{
++ return ip6_pkt_drop(skb, ICMPV6_POLICY_FAIL, IPSTATS_MIB_INNOROUTES);
++}
++
++static int ip6_pkt_policy_failed_out(struct net *net, struct sock *sk, struct sk_buff *skb)
++{
++ skb->dev = skb_dst(skb)->dev;
++ return ip6_pkt_drop(skb, ICMPV6_POLICY_FAIL, IPSTATS_MIB_OUTNOROUTES);
++}
++
+ /*
+ * Allocate a dst for local (unicast / anycast) address.
+ */
+@@ -5047,7 +5077,8 @@ static int rtm_to_fib6_config(struct sk_
+ if (rtm->rtm_type == RTN_UNREACHABLE ||
+ rtm->rtm_type == RTN_BLACKHOLE ||
+ rtm->rtm_type == RTN_PROHIBIT ||
+- rtm->rtm_type == RTN_THROW)
++ rtm->rtm_type == RTN_THROW ||
++ rtm->rtm_type == RTN_POLICY_FAILED)
+ cfg->fc_flags |= RTF_REJECT;
+
+ if (rtm->rtm_type == RTN_LOCAL)
+@@ -6300,6 +6331,8 @@ static int ip6_route_dev_notify(struct n
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ net->ipv6.ip6_prohibit_entry->dst.dev = dev;
+ net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev);
++ net->ipv6.ip6_policy_failed_entry->dst.dev = dev;
++ net->ipv6.ip6_policy_failed_entry->rt6i_idev = in6_dev_get(dev);
+ net->ipv6.ip6_blk_hole_entry->dst.dev = dev;
+ net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev);
+ #endif
+@@ -6311,6 +6344,7 @@ static int ip6_route_dev_notify(struct n
+ in6_dev_put_clear(&net->ipv6.ip6_null_entry->rt6i_idev);
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ in6_dev_put_clear(&net->ipv6.ip6_prohibit_entry->rt6i_idev);
++ in6_dev_put_clear(&net->ipv6.ip6_policy_failed_entry->rt6i_idev);
+ in6_dev_put_clear(&net->ipv6.ip6_blk_hole_entry->rt6i_idev);
+ #endif
+ }
+@@ -6502,6 +6536,8 @@ static int __net_init ip6_route_net_init
+
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ net->ipv6.fib6_has_custom_rules = false;
++
++
+ net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template,
+ sizeof(*net->ipv6.ip6_prohibit_entry),
+ GFP_KERNEL);
+@@ -6512,11 +6548,21 @@ static int __net_init ip6_route_net_init
+ ip6_template_metrics, true);
+ INIT_LIST_HEAD(&net->ipv6.ip6_prohibit_entry->rt6i_uncached);
+
++ net->ipv6.ip6_policy_failed_entry =
++ kmemdup(&ip6_policy_failed_entry_template,
++ sizeof(*net->ipv6.ip6_policy_failed_entry), GFP_KERNEL);
++ if (!net->ipv6.ip6_policy_failed_entry)
++ goto out_ip6_prohibit_entry;
++ net->ipv6.ip6_policy_failed_entry->dst.ops = &net->ipv6.ip6_dst_ops;
++ dst_init_metrics(&net->ipv6.ip6_policy_failed_entry->dst,
++ ip6_template_metrics, true);
++ INIT_LIST_HEAD(&net->ipv6.ip6_policy_failed_entry->rt6i_uncached);
++
+ net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template,
+ sizeof(*net->ipv6.ip6_blk_hole_entry),
+ GFP_KERNEL);
+ if (!net->ipv6.ip6_blk_hole_entry)
+- goto out_ip6_prohibit_entry;
++ goto out_ip6_policy_failed_entry;
+ net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops;
+ dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst,
+ ip6_template_metrics, true);
+@@ -6543,6 +6589,8 @@ out:
+ return ret;
+
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
++out_ip6_policy_failed_entry:
++ kfree(net->ipv6.ip6_policy_failed_entry);
+ out_ip6_prohibit_entry:
+ kfree(net->ipv6.ip6_prohibit_entry);
+ out_ip6_null_entry:
+@@ -6562,6 +6610,7 @@ static void __net_exit ip6_route_net_exi
+ kfree(net->ipv6.ip6_null_entry);
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ kfree(net->ipv6.ip6_prohibit_entry);
++ kfree(net->ipv6.ip6_policy_failed_entry);
+ kfree(net->ipv6.ip6_blk_hole_entry);
+ #endif
+ dst_entries_destroy(&net->ipv6.ip6_dst_ops);
+@@ -6639,6 +6688,9 @@ void __init ip6_route_init_special_entri
+ init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
+ init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev;
+ init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
++ init_net.ipv6.ip6_policy_failed_entry->dst.dev = init_net.loopback_dev;
++ init_net.ipv6.ip6_policy_failed_entry->rt6i_idev =
++ in6_dev_get(init_net.loopback_dev);
+ #endif
+ }
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-19 01:11:14 +0000