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linux/net/netfilter
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Florian Westphal cff3bd012a netfilter: nf_tables: prefer nft_chain_validate 
nft_chain_validate already performs loop detection because a cycle will
result in a call stack overflow (ctx->level >= NFT_JUMP_STACK_SIZE).

It also follows maps via ->validate callback in nft_lookup, so there
appears no reason to iterate the maps again.

nf_tables_check_loops() and all its helper functions can be removed.
This improves ruleset load time significantly, from 23s down to 12s.

This also fixes a crash bug. Old loop detection code can result in
unbounded recursion:

BUG: TASK stack guard page was hit at ....
Oops: stack guard page: 0000 [#1] PREEMPT SMP KASAN
CPU: 4 PID: 1539 Comm: nft Not tainted 6.10.0-rc5+ #1
[..]

with a suitable ruleset during validation of register stores.

I can't see any actual reason to attempt to check for this from
nft_validate_register_store(), at this point the transaction is still in
progress, so we don't have a full picture of the rule graph.

For nf-next it might make sense to either remove it or make this depend
on table->validate_state in case we could catch an error earlier
(for improved error reporting to userspace).

Fixes: 20a69341f2 ("netfilter: nf_tables: add netlink set API")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2024-07-11 11:26:35 +02:00
..
ipset netfilter: ipset: Fix suspicious rcu_dereference_protected() 2024-06-19 15:12:56 +02:00
ipvs ipvs: allow some sysctls in non-init user namespaces 2024-05-08 12:22:18 +01:00
core.c netfilter: move the sysctl nf_hooks_lwtunnel into the netfilter core 2024-06-19 18:41:59 +02:00
Kconfig netfilter: xtables: allow xtables-nft only builds 2024-01-29 15:43:21 +01:00
Makefile x86/bugs: Rename CONFIG_RETPOLINE => CONFIG_MITIGATION_RETPOLINE 2024-01-10 10:52:28 +01:00
nf_bpf_link.c bpf: Take into account BPF token when fetching helper protos 2024-01-24 16:21:01 -08:00
nf_conncount.c netfilter: nf_conncount: Use KMEM_CACHE instead of kmem_cache_create() 2024-01-29 15:43:20 +01:00
nf_conntrack_acct.c
nf_conntrack_amanda.c
nf_conntrack_bpf.c bpf: treewide: Annotate BPF kfuncs in BTF 2024-01-31 20:40:56 -08:00
nf_conntrack_broadcast.c netfilter: add missing module descriptions 2023-11-08 13:52:32 +01:00
nf_conntrack_core.c netfilter: conntrack: remove flowtable early-drop test 2024-05-06 16:29:21 +02:00
nf_conntrack_ecache.c
nf_conntrack_expect.c netfilter: expect: Simplify the allocation of slab caches in nf_conntrack_expect_init 2024-02-21 11:57:11 +01:00
nf_conntrack_extend.c netfilter: conntrack: fix extension size table 2023-09-13 21:57:50 +02:00
nf_conntrack_ftp.c
nf_conntrack_h323_asn1.c netfilter: nf_conntrack_h323: Add protection for bmp length out of range 2024-03-07 03:10:35 +01:00
nf_conntrack_h323_main.c
nf_conntrack_h323_types.c
nf_conntrack_helper.c netfilter: conntrack: simplify nf_conntrack_alter_reply 2023-10-10 16:34:28 +02:00
nf_conntrack_irc.c
nf_conntrack_labels.c netfilter: conntrack: switch connlabels to atomic_t 2023-10-24 13:16:30 +02:00
nf_conntrack_netbios_ns.c
nf_conntrack_netlink.c netfilter: ctnetlink: fix filtering for zone 0 2024-02-08 12:10:18 +01:00
nf_conntrack_ovs.c
nf_conntrack_pptp.c
nf_conntrack_proto.c netfilter: add missing module descriptions 2023-11-08 13:52:32 +01:00
nf_conntrack_proto_dccp.c netfilter: conntrack: dccp: try not to drop skb in conntrack 2024-05-06 11:13:56 +02:00
nf_conntrack_proto_generic.c
nf_conntrack_proto_gre.c netfilter: conntrack: gre: don't set assured flag for clash entries 2023-07-05 14:42:15 +02:00
nf_conntrack_proto_icmp.c
nf_conntrack_proto_icmpv6.c netfilter: conntrack: fix ct-state for ICMPv6 Multicast Router Discovery 2024-05-06 11:13:56 +02:00
nf_conntrack_proto_sctp.c netfilter: conntrack: check SCTP_CID_SHUTDOWN_ACK for vtag setting in sctp_new 2024-01-31 23:13:57 +01:00
nf_conntrack_proto_tcp.c netfilter: conntrack: correct window scaling with retransmitted SYN 2024-01-31 23:07:04 +01:00
nf_conntrack_proto_udp.c
nf_conntrack_sane.c
nf_conntrack_seqadj.c
nf_conntrack_sip.c netfilter: nf_conntrack_sip: fix the ct_sip_parse_numerical_param() return value. 2023-06-26 17:18:48 +02:00
nf_conntrack_snmp.c
nf_conntrack_standalone.c netfilter: move the sysctl nf_hooks_lwtunnel into the netfilter core 2024-06-19 18:41:59 +02:00
nf_conntrack_tftp.c
nf_conntrack_timeout.c
nf_conntrack_timestamp.c
nf_dup_netdev.c
nf_flow_table_core.c ipv6: introduce dst_rt6_info() helper 2024-04-29 13:32:01 +01:00
nf_flow_table_inet.c netfilter: flowtable: validate pppoe header 2024-04-11 12:13:11 +02:00
nf_flow_table_ip.c inet: introduce dst_rtable() helper 2024-04-30 18:32:38 -07:00
nf_flow_table_offload.c net: flow_dissector: Use 64bits for used_keys 2023-07-31 09:11:24 +01:00
nf_flow_table_procfs.c
nf_hooks_lwtunnel.c netfilter: fix undefined reference to 'netfilter_lwtunnel_*' when CONFIG_SYSCTL=n 2024-06-24 16:02:50 +02:00
nf_internals.h netfilter: move the sysctl nf_hooks_lwtunnel into the netfilter core 2024-06-19 18:41:59 +02:00
nf_log.c netfilter: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
nf_log_syslog.c netfilter: propagate net to nf_bridge_get_physindev 2024-01-17 12:02:48 +01:00
nf_nat_amanda.c
nf_nat_bpf.c bpf: treewide: Annotate BPF kfuncs in BTF 2024-01-31 20:40:56 -08:00
nf_nat_core.c netfilter: nat: restore default DNAT behavior 2024-02-15 00:20:00 +01:00
nf_nat_ftp.c
nf_nat_helper.c
nf_nat_irc.c
nf_nat_masquerade.c
nf_nat_ovs.c netfilter: nf_nat: fix action not being set for all ct states 2024-01-03 11:17:17 +01:00
nf_nat_proto.c ipsec-next-2023-10-28 2023-10-30 14:36:57 -07:00
nf_nat_redirect.c netfilter: nat: fix ipv6 nat redirect with mapped and scoped addresses 2023-11-08 16:40:30 +01:00
nf_nat_sip.c
nf_nat_tftp.c
nf_queue.c netfilter: move nf_reinject into nfnetlink_queue modules 2024-02-21 12:03:22 +01:00
nf_sockopt.c
nf_synproxy_core.c ipv6: annotate data-races around cnf.hop_limit 2024-03-01 08:42:31 +00:00
nf_tables_api.c netfilter: nf_tables: prefer nft_chain_validate 2024-07-11 11:26:35 +02:00
nf_tables_core.c x86/bugs: Rename CONFIG_RETPOLINE => CONFIG_MITIGATION_RETPOLINE 2024-01-10 10:52:28 +01:00
nf_tables_offload.c net: flow_dissector: Use 64bits for used_keys 2023-07-31 09:11:24 +01:00
nf_tables_trace.c netfilter: nf_tables: mask out non-verdict bits when checking return value 2023-10-18 10:26:43 +02:00
nfnetlink.c netfilter: nfnetlink: Handle ACK flags for batch messages 2024-04-22 17:20:42 -07:00
nfnetlink_acct.c
nfnetlink_cthelper.c
nfnetlink_cttimeout.c
nfnetlink_hook.c
nfnetlink_log.c netfilter: nfnetlink_log: use proper helper for fetching physinif 2024-01-17 12:02:47 +01:00
nfnetlink_osf.c netfilter: add missing module descriptions 2023-11-08 13:52:32 +01:00
nfnetlink_queue.c netfilter: nfnetlink_queue: drop bogus WARN_ON 2024-07-11 11:26:33 +02:00
nft_bitwise.c netfilter pull request 23-06-26 2023-06-26 12:59:18 -07:00
nft_byteorder.c netfilter: nf_tables: fix pointer math issue in nft_byteorder_eval() 2023-11-14 16:16:21 +01:00
nft_chain_filter.c netfilter: nf_tables: remove NETDEV_CHANGENAME from netdev chain event handler 2024-05-06 11:13:55 +02:00
nft_chain_nat.c netfilter: add missing module descriptions 2023-11-08 13:52:32 +01:00
nft_chain_route.c
nft_cmp.c net: flow_dissector: Use 64bits for used_keys 2023-07-31 09:11:24 +01:00
nft_compat.c netfilter: nf_tables: allow NFPROTO_INET in nft_(match/target)_validate() 2024-02-28 23:52:55 +01:00
nft_connlimit.c netfilter: nf_tables: allow clone callbacks to sleep 2024-05-10 11:13:45 +02:00
nft_counter.c netfilter: nf_tables: allow clone callbacks to sleep 2024-05-10 11:13:45 +02:00
nft_ct.c Core x86 changes for v6.9: 2024-03-11 19:53:15 -07:00
nft_ct_fast.c
nft_dup_netdev.c
nft_dynset.c netfilter: nf_tables: allow clone callbacks to sleep 2024-05-10 11:13:45 +02:00
nft_exthdr.c netfilter: nf_tables: fix 'exist' matching on bigendian arches 2023-12-06 17:15:42 +01:00
nft_fib.c netfilter: nft_fib: allow from forward/input without iif selector 2024-05-29 00:37:51 +02:00
nft_fib_inet.c
nft_fib_netdev.c
nft_flow_offload.c netfilter: nf_tables: fix bidirectional offload regression 2024-02-15 00:20:00 +01:00
nft_fwd_netdev.c netfilter: add missing module descriptions 2023-11-08 13:52:32 +01:00
nft_hash.c netfilter: nf_tables: limit allowed range via nla_policy 2023-06-26 08:05:57 +02:00
nft_immediate.c netfilter: nft_immediate: drop chain reference counter on error 2024-01-03 11:17:17 +01:00
nft_inner.c nf_tables: fix NULL pointer dereference in nft_inner_init() 2023-10-12 10:28:45 +02:00
nft_last.c netfilter: nf_tables: allow clone callbacks to sleep 2024-05-10 11:13:45 +02:00
nft_limit.c netfilter: nf_tables: allow clone callbacks to sleep 2024-05-10 11:13:45 +02:00
nft_log.c
nft_lookup.c netfilter: nf_tables: fully validate NFT_DATA_VALUE on store to data registers 2024-06-27 01:09:51 +02:00
nft_masq.c netfilter: nf_tables: use NLA_POLICY_MASK to test for valid flag options 2023-07-27 13:45:51 +02:00
nft_meta.c netfilter: nft_inner: validate mandatory meta and payload 2024-06-11 18:46:04 +02:00
nft_nat.c netfilter: nf_tables: validate NFPROTO_* family 2024-01-24 20:02:40 +01:00
nft_numgen.c
nft_objref.c netfilter: nf_tables: report use refcount overflow 2023-07-05 14:42:15 +02:00
nft_osf.c netfilter: nft_osf: simplify init path 2024-02-21 11:57:11 +01:00
nft_payload.c netfilter: nft_inner: validate mandatory meta and payload 2024-06-11 18:46:04 +02:00
nft_queue.c
nft_quota.c netfilter: nf_tables: allow clone callbacks to sleep 2024-05-10 11:13:45 +02:00
nft_range.c netfilter: nf_tables: limit allowed range via nla_policy 2023-06-26 08:05:57 +02:00
nft_redir.c netfilter: nf_tables: use NLA_POLICY_MASK to test for valid flag options 2023-07-27 13:45:51 +02:00
nft_reject.c netfilter: nf_tables: limit allowed range via nla_policy 2023-06-26 08:05:57 +02:00
nft_reject_inet.c
nft_reject_netdev.c
nft_rt.c inet: introduce dst_rtable() helper 2024-04-30 18:32:38 -07:00
nft_set_bitmap.c netfilter: nf_tables: restore set elements when delete set fails 2024-04-17 17:43:11 +02:00
nft_set_hash.c netfilter: nf_tables: restore set elements when delete set fails 2024-04-17 17:43:11 +02:00
nft_set_pipapo.c netfilter: nft_set_pipapo: remove dirty flag 2024-05-10 11:13:45 +02:00
nft_set_pipapo.h netfilter: nft_set_pipapo: remove dirty flag 2024-05-10 11:13:45 +02:00
nft_set_pipapo_avx2.c netfilter: nft_set_pipapo: constify lookup fn args where possible 2024-02-21 11:57:11 +01:00
nft_set_pipapo_avx2.h
nft_set_rbtree.c netfilter: nf_tables: restore set elements when delete set fails 2024-04-17 17:43:11 +02:00
nft_socket.c netfilter: nf_tables: validate NFPROTO_* family 2024-01-24 20:02:40 +01:00
nft_synproxy.c netfilter: nf_tables: validate NFPROTO_* family 2024-01-24 20:02:40 +01:00
nft_tproxy.c netfilter: nf_tables: validate NFPROTO_* family 2024-01-24 20:02:40 +01:00
nft_tunnel.c ip_tunnel: convert __be16 tunnel flags to bitmaps 2024-04-01 10:49:28 +01:00
nft_xfrm.c netfilter: nf_tables: validate NFPROTO_* family 2024-01-24 20:02:40 +01:00
utils.c netfilter: move nf_reinject into nfnetlink_queue modules 2024-02-21 12:03:22 +01:00
x_tables.c netfilter: x_tables: Use unsafe_memcpy() for 0-sized destination 2024-02-21 12:03:22 +01:00
xt_addrtype.c
xt_AUDIT.c
xt_bpf.c
xt_cgroup.c
xt_CHECKSUM.c
xt_CLASSIFY.c
xt_cluster.c
xt_comment.c
xt_connbytes.c
xt_connlabel.c
xt_connlimit.c
xt_connmark.c
xt_CONNSECMARK.c
xt_conntrack.c
xt_cpu.c
xt_CT.c
xt_dccp.c
xt_devgroup.c
xt_dscp.c
xt_DSCP.c
xt_ecn.c
xt_esp.c
xt_hashlimit.c
xt_helper.c
xt_hl.c
xt_HL.c
xt_HMARK.c
xt_IDLETIMER.c
xt_ipcomp.c
xt_iprange.c
xt_ipvs.c
xt_l2tp.c
xt_LED.c leds: Change led_trigger_blink[_oneshot]() delay parameters to pass-by-value 2023-05-25 12:16:27 +01:00
xt_length.c
xt_limit.c
xt_LOG.c
xt_mac.c
xt_mark.c
xt_MASQUERADE.c
xt_multiport.c
xt_nat.c
xt_NETMAP.c
xt_nfacct.c
xt_NFLOG.c
xt_NFQUEUE.c
xt_osf.c netfilter: nfnetlink_osf: fix module autoload 2023-06-20 22:43:42 +02:00
xt_owner.c netfilter: xt_owner: Fix for unsafe access of sk->sk_socket 2023-12-06 17:52:15 +01:00
xt_physdev.c netfilter: propagate net to nf_bridge_get_physindev 2024-01-17 12:02:48 +01:00
xt_pkttype.c
xt_policy.c
xt_quota.c
xt_RATEEST.c
xt_rateest.c
xt_realm.c
xt_recent.c netfilter: xt_recent: fix (increase) ipv6 literal buffer length 2023-11-08 13:53:36 +01:00
xt_REDIRECT.c
xt_repldata.h netfilter: xtables: refactor deprecated strncpy 2023-08-22 15:13:21 +02:00
xt_sctp.c netfilter: xt_sctp: validate the flag_info count 2023-08-30 17:34:01 +02:00
xt_SECMARK.c
xt_set.c
xt_socket.c net: annotate data-races around sk->sk_mark 2023-07-29 18:13:41 +01:00
xt_state.c
xt_statistic.c
xt_string.c
xt_TCPMSS.c
xt_tcpmss.c
xt_TCPOPTSTRIP.c
xt_tcpudp.c
xt_TEE.c
xt_time.c
xt_TPROXY.c
xt_TRACE.c
xt_u32.c netfilter: xt_u32: validate user space input 2023-08-30 17:34:01 +02:00