From c16517d26de30c90dabce1e456615fd7fbdce07c Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sun, 23 Feb 2020 13:20:11 +0100 Subject: kernel: copy kernel 4.19 code to 5.4 No changes were done to the patches while coping them. Currently they do not apply on top of kernel 5.4. Signed-off-by: Hauke Mehrtens --- ...jecting-with-source-address-failed-policy.patch | 247 +++++++++++++++++++++ 1 file changed, 247 insertions(+) create mode 100644 target/linux/generic/pending-5.4/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch (limited to 'target/linux/generic/pending-5.4/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch') diff --git a/target/linux/generic/pending-5.4/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch b/target/linux/generic/pending-5.4/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch new file mode 100644 index 0000000000..c35aca8a18 --- /dev/null +++ b/target/linux/generic/pending-5.4/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch @@ -0,0 +1,247 @@ +From: Jonas Gorski +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 +--- + 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 +@@ -78,6 +78,7 @@ struct netns_ipv6 { + unsigned int fib6_rules_require_fldissect; + bool fib6_has_custom_rules; + 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 +@@ -228,6 +228,7 @@ 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 +@@ -139,6 +139,10 @@ 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 +@@ -2474,6 +2474,7 @@ 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 +@@ -179,6 +179,7 @@ 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 +@@ -221,6 +221,10 @@ 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 +@@ -162,6 +162,8 @@ 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, +@@ -328,6 +330,18 @@ 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), +@@ -906,6 +920,7 @@ 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, +@@ -943,6 +958,10 @@ 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: +@@ -3789,6 +3808,17 @@ 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. + */ +@@ -4236,7 +4266,8 @@ 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) +@@ -5084,6 +5115,8 @@ 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 +@@ -5095,6 +5128,7 @@ 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 + } +@@ -5289,6 +5323,15 @@ static int __net_init ip6_route_net_init + 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); ++ ++ 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_blk_hole_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); + #endif + + net->ipv6.sysctl.flush_delay = 0; +@@ -5307,6 +5350,8 @@ out: + return ret; + + #ifdef CONFIG_IPV6_MULTIPLE_TABLES ++out_ip6_blk_hole_entry: ++ kfree(net->ipv6.ip6_blk_hole_entry); + out_ip6_prohibit_entry: + kfree(net->ipv6.ip6_prohibit_entry); + out_ip6_null_entry: +@@ -5327,6 +5372,7 @@ static void __net_exit ip6_route_net_exi + #ifdef CONFIG_IPV6_MULTIPLE_TABLES + kfree(net->ipv6.ip6_prohibit_entry); + kfree(net->ipv6.ip6_blk_hole_entry); ++ kfree(net->ipv6.ip6_policy_failed_entry); + #endif + dst_entries_destroy(&net->ipv6.ip6_dst_ops); + } +@@ -5403,6 +5449,9 @@ 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 + } + -- cgit v1.2.3