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linux-stable-mirror/net/netfilter
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Xin Long 576a5d2bad netfilter: skip recording stale or retransmitted INIT 
An INIT whose init_tag matches the peer's vtag does not provide new state
information. It indicates either:

- a stale INIT (after INIT-ACK has already been seen on the same side), or
- a retransmitted INIT (after INIT has already been recorded on the same
  side).

In both cases, the INIT must not update ct->proto.sctp.init[] state, since
it does not advance the handshake tracking and may otherwise corrupt
INIT/INIT-ACK validation logic.

Allow INIT processing only when the conntrack entry is newly created
(SCTP_CONNTRACK_NONE), or when the init_tag differs from the stored peer
vtag.

Note it skips the check for the ct with old_state SCTP_CONNTRACK_NONE in
nf_conntrack_sctp_packet(), as it is just created in sctp_new() where it
set ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = ih->init_tag.

Fixes: 9fb9cbb108 ("[NETFILTER]: Add nf_conntrack subsystem.")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Link: https://patch.msgid.link/ee56c3e416452b2a40589a2a85245ac2ad5e9f4b.1777214801.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-28 17:52:19 -07:00
..
ipset
netfilter: require Ethernet MAC header before using eth_hdr()
2026-04-10 12:16:27 +02:00
ipvs
ipvs: fix MTU check for GSO packets in tunnel mode
2026-04-20 23:45:43 +02:00
core.c
netfilter: remove nf_ipv6_ops and use direct function calls
2026-03-29 11:21:24 -07:00
Kconfig
netfilter: conntrack: remove UDP-Lite conntrack support
2026-04-10 12:16:26 +02:00
Makefile
netfilter: flowtable: move path discovery infrastructure to its own file
2025-11-27 23:59:43 +00:00
nf_bpf_link.c
netfilter: bpf: defer hook memory release until rcu readers are done
2026-03-19 10:26:31 +01:00
nf_conncount.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
nf_conntrack_acct.c
…
nf_conntrack_amanda.c
netfilter: use function typedefs for __rcu NAT helper hook pointers
2026-04-08 07:51:26 +02:00
nf_conntrack_bpf.c
Merge tag 'net-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2026-02-11 19:31:52 -08:00
nf_conntrack_broadcast.c
netfilter: nf_conntrack_expect: store netns and zone in expectation
2026-03-26 13:24:40 +01:00
nf_conntrack_core.c
netfilter: conntrack: remove UDP-Lite conntrack support
2026-04-10 12:16:26 +02:00
nf_conntrack_ecache.c
netfilter: ctnetlink: ensure safe access to master conntrack
2026-03-26 13:18:32 +01:00
nf_conntrack_expect.c
netfilter: nf_conntrack_expect: skip expectations in other netns via proc
2026-03-26 13:28:03 +01:00
nf_conntrack_extend.c
…
nf_conntrack_ftp.c
netfilter: use function typedefs for __rcu NAT helper hook pointers
2026-04-08 07:51:26 +02:00
nf_conntrack_h323_asn1.c
netfilter: nf_conntrack_h323: Correct indentation when H323_TRACE defined
2026-04-08 07:51:31 +02:00
nf_conntrack_h323_main.c
netfilter: nf_conntrack_expect: honor expectation helper field
2026-03-26 13:18:31 +01:00
nf_conntrack_h323_types.c
…
nf_conntrack_helper.c
netfilter: nf_conntrack_helper: pass helper to expect cleanup
2026-04-01 11:55:29 +02:00
nf_conntrack_irc.c
netfilter: use function typedefs for __rcu NAT helper hook pointers
2026-04-08 07:51:26 +02:00
nf_conntrack_labels.c
…
nf_conntrack_netbios_ns.c
…
nf_conntrack_netlink.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-04-02 11:03:13 -07:00
nf_conntrack_ovs.c
net/ipv6: Introduce payload_len helpers
2026-02-06 20:50:03 -08:00
nf_conntrack_pptp.c
…
nf_conntrack_proto_generic.c
netfilter: nf_conntrack: Add allow_clash to generic protocol handler
2026-01-20 16:23:37 +01:00
nf_conntrack_proto_gre.c
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
nf_conntrack_proto_icmp.c
netfilter: nf_conntrack: enable icmp clash support
2026-01-20 16:23:37 +01:00
nf_conntrack_proto_icmpv6.c
netfilter: nf_conntrack: enable icmp clash support
2026-01-20 16:23:37 +01:00
nf_conntrack_proto_sctp.c
netfilter: skip recording stale or retransmitted INIT
2026-04-28 17:52:19 -07:00
nf_conntrack_proto_tcp.c
netfilter: ctnetlink: use netlink policy range checks
2026-03-26 13:28:17 +01:00
nf_conntrack_proto_udp.c
netfilter: conntrack: remove UDP-Lite conntrack support
2026-04-10 12:16:26 +02:00
nf_conntrack_proto.c
netfilter: conntrack: remove UDP-Lite conntrack support
2026-04-10 12:16:26 +02:00
nf_conntrack_sane.c
…
nf_conntrack_seqadj.c
…
nf_conntrack_sip.c
netfilter: nf_conntrack_sip: don't use simple_strtoul
2026-04-24 20:09:57 +02:00
nf_conntrack_snmp.c
netfilter: use function typedefs for __rcu NAT helper hook pointers
2026-04-08 07:51:26 +02:00
nf_conntrack_standalone.c
netfilter: conntrack: remove UDP-Lite conntrack support
2026-04-10 12:16:26 +02:00
nf_conntrack_tftp.c
netfilter: use function typedefs for __rcu NAT helper hook pointers
2026-04-08 07:51:26 +02:00
nf_conntrack_timeout.c
…
nf_conntrack_timestamp.c
…
nf_dup_netdev.c
netfilter: nf_tables_offload: add nft_flow_action_entry_next() and use it
2026-04-08 07:51:31 +02:00
nf_flow_table_bpf.c
bpf: Remove redundant KF_TRUSTED_ARGS flag from all kfuncs
2026-01-02 12:04:28 -08:00
nf_flow_table_core.c
netfilter: flowtable: dedicated slab for flow entry
2026-02-06 13:34:55 +01:00
nf_flow_table_inet.c
…
nf_flow_table_ip.c
netfilter: nf_flow_table_ip: reset mac header before vlan push
2026-03-13 15:31:15 +01:00
nf_flow_table_offload.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-04-02 11:03:13 -07:00
nf_flow_table_path.c
netfilter: nf_conntrack: don't rely on implicit includes
2026-01-20 16:23:37 +01:00
nf_flow_table_procfs.c
…
nf_flow_table_xdp.c
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
nf_hooks_lwtunnel.c
…
nf_internals.h
…
nf_log_syslog.c
netfilter: require Ethernet MAC header before using eth_hdr()
2026-04-10 12:16:27 +02:00
nf_log.c
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
nf_nat_amanda.c
netfilter: conntrack: remove sprintf usage
2026-04-20 23:27:46 +02:00
nf_nat_bpf.c
bpf: Remove redundant KF_TRUSTED_ARGS flag from all kfuncs
2026-01-02 12:04:28 -08:00
nf_nat_core.c
netfilter: nat: use kfree_rcu to release ops
2026-04-20 23:45:41 +02:00
nf_nat_ftp.c
…
nf_nat_helper.c
…
nf_nat_irc.c
…
nf_nat_masquerade.c
netfilter: remove nf_ipv6_ops and use direct function calls
2026-03-29 11:21:24 -07:00
nf_nat_ovs.c
netfilter: nf_conntrack: don't rely on implicit includes
2026-01-20 16:23:37 +01:00
nf_nat_proto.c
netfilter: conntrack: remove UDP-Lite conntrack support
2026-04-10 12:16:26 +02:00
nf_nat_redirect.c
…
nf_nat_sip.c
netfilter: nf_conntrack_sip: don't use simple_strtoul
2026-04-24 20:09:57 +02:00
nf_nat_tftp.c
…
nf_queue.c
net: Add SPDX ids to some source files
2026-03-09 18:32:45 -07:00
nf_sockopt.c
…
nf_synproxy_core.c
netfilter: don't include xt and nftables.h in unrelated subsystems
2026-01-20 16:23:37 +01:00
nf_tables_api.c
netfilter: nf_tables: add hook transactions for device deletions
2026-04-21 12:48:44 +02:00
nf_tables_core.c
netfilter: nft_meta: add double-tagged vlan and pppoe support
2026-04-08 07:51:31 +02:00
nf_tables_offload.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
nf_tables_trace.c
…
nfnetlink_acct.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nfnetlink_cthelper.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nfnetlink_cttimeout.c
netfilter: conntrack: remove UDP-Lite conntrack support
2026-04-10 12:16:26 +02:00
nfnetlink_hook.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nfnetlink_log.c
netfilter: nfnetlink: prefer skb_mac_header helpers
2026-04-10 12:16:26 +02:00
nfnetlink_osf.c
netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check
2026-04-20 23:45:44 +02:00
nfnetlink_queue.c
netfilter: nfnetlink: prefer skb_mac_header helpers
2026-04-10 12:16:26 +02:00
nfnetlink.c
net: Add SPDX ids to some source files
2026-03-09 18:32:45 -07:00
nft_bitwise.c
netfilter: reject zero shift in nft_bitwise
2026-04-24 20:09:57 +02:00
nft_byteorder.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_chain_filter.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-03-12 12:53:34 -07:00
nft_chain_nat.c
…
nft_chain_route.c
…
nft_cmp.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_compat.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nft_connlimit.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nft_counter.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_ct_fast.c
…
nft_ct.c
netfilter: conntrack: remove UDP-Lite conntrack support
2026-04-10 12:16:26 +02:00
nft_dup_netdev.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_dynset.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nft_exthdr.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_fib_inet.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_fib_netdev.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_fib.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_flow_offload.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_fwd_netdev.c
netfilter: nft_fwd_netdev: check ttl/hl before forwarding
2026-04-10 12:16:27 +02:00
nft_hash.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_immediate.c
netfilter: nf_tables_offload: add nft_flow_action_entry_next() and use it
2026-04-08 07:51:31 +02:00
nft_inner.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nft_last.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-02-26 10:23:00 -08:00
nft_limit.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nft_log.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nft_lookup.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_masq.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_meta.c
netfilter: nft_meta: add double-tagged vlan and pppoe support
2026-04-08 07:51:31 +02:00
nft_nat.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_numgen.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_objref.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_osf.c
netfilter: nft_osf: restrict it to ipv4
2026-04-20 23:27:36 +02:00
nft_payload.c
netfilter: nft_meta: add double-tagged vlan and pppoe support
2026-04-08 07:51:31 +02:00
nft_queue.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nft_quota.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nft_range.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_redir.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_reject_inet.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_reject_netdev.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_reject.c
…
nft_rt.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_set_bitmap.c
netfilter: nft_set_bitmap: fix lockdep splat due to missing annotation
2025-09-10 20:28:24 +02:00
nft_set_hash.c
netfilter: nf_tables: clone set on flush only
2026-03-05 13:22:37 +01:00
nft_set_pipapo_avx2.c
netfilter: nft_set_pipapo_avx2: remove redundant loop in lookup_slow
2026-04-08 07:51:31 +02:00
nft_set_pipapo_avx2.h
netfilter: nft_set_pipapo: use avx2 algorithm for insertions too
2025-08-20 13:52:37 +02:00
nft_set_pipapo.c
netfilter: nft_set_pipapo: increment data in one step
2026-04-08 07:51:31 +02:00
nft_set_pipapo.h
netfilter: nft_set_pipapo: increment data in one step
2026-04-08 07:51:31 +02:00
nft_set_rbtree.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-03-26 12:09:57 -07:00
nft_socket.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_synproxy.c
netfilter: add more netlink-based policy range checks
2026-04-08 07:51:30 +02:00
nft_tproxy.c
netfilter: nf_tables: remove register tracking infrastructure
2026-02-25 19:36:26 -08:00
nft_tunnel.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
nft_xfrm.c
netfilter: nf_tables: add netlink policy based cap on registers
2026-04-08 07:51:31 +02:00
utils.c
netfilter: remove nf_ipv6_ops and use direct function calls
2026-03-29 11:21:24 -07:00
x_tables.c
netfilter: x_tables: Avoid a couple -Wflex-array-member-not-at-end warnings
2026-04-10 12:16:27 +02:00
xt_addrtype.c
…
xt_AUDIT.c
audit: add audit_log_nf_skb helper function
2025-12-16 11:04:14 -05:00
xt_bpf.c
…
xt_cgroup.c
netfilter: x_tables: ensure names are nul-terminated
2026-04-01 11:55:29 +02:00
xt_CHECKSUM.c
…
xt_CLASSIFY.c
…
xt_cluster.c
…
xt_comment.c
…
xt_connbytes.c
net: Add SPDX ids to some source files
2026-03-09 18:32:45 -07:00
xt_connlabel.c
…
xt_connlimit.c
net: Add SPDX ids to some source files
2026-03-09 18:32:45 -07:00
xt_connmark.c
…
xt_CONNSECMARK.c
…
xt_conntrack.c
…
xt_cpu.c
…
xt_CT.c
netfilter: xt_CT: drop pending enqueued packets on template removal
2026-03-13 15:31:15 +01:00
xt_dccp.c
netfilter: add deprecation warning for dccp support
2026-04-08 07:51:27 +02:00
xt_devgroup.c
…
xt_dscp.c
…
xt_DSCP.c
…
xt_ecn.c
…
xt_esp.c
…
xt_hashlimit.c
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
xt_helper.c
…
xt_hl.c
netfilter: xt_HL: add pr_fmt and checkentry validation
2026-04-10 12:16:26 +02:00
xt_HL.c
…
xt_HMARK.c
…
xt_IDLETIMER.c
netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels
2026-03-10 14:10:43 +01:00
xt_ipcomp.c
…
xt_iprange.c
…
xt_ipvs.c
…
xt_l2tp.c
…
xt_LED.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
xt_length.c
…
xt_limit.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
xt_LOG.c
…
xt_mac.c
netfilter: xtables: restrict several matches to inet family
2026-04-20 23:27:52 +02:00
xt_mark.c
…
xt_MASQUERADE.c
…
xt_multiport.c
netfilter: xt_multiport: validate range encoding in checkentry
2026-04-08 13:33:38 +02:00
xt_nat.c
…
xt_NETMAP.c
…
xt_nfacct.c
…
xt_NFLOG.c
…
xt_NFQUEUE.c
…
xt_osf.c
…
xt_owner.c
netfilter: xtables: restrict several matches to inet family
2026-04-20 23:27:52 +02:00
xt_physdev.c
netfilter: xtables: restrict several matches to inet family
2026-04-20 23:27:52 +02:00
xt_pkttype.c
…
xt_policy.c
netfilter: xt_policy: fix strict mode inbound policy matching
2026-04-24 20:04:56 +02:00
xt_quota.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
xt_rateest.c
netfilter: x_tables: ensure names are nul-terminated
2026-04-01 11:55:29 +02:00
xt_RATEEST.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
xt_realm.c
netfilter: xtables: restrict several matches to inet family
2026-04-20 23:27:52 +02:00
xt_recent.c
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
xt_REDIRECT.c
…
xt_repldata.h
…
xt_sctp.c
…
xt_SECMARK.c
…
xt_set.c
…
xt_socket.c
netfilter: xt_socket: enable defrag after all other checks
2026-04-10 12:16:26 +02:00
xt_state.c
…
xt_statistic.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
xt_string.c
…
xt_tcpmss.c
netfilter: xt_tcpmss: check remaining length before reading optlen
2026-01-20 16:23:38 +01:00
xt_TCPMSS.c
…
xt_TCPOPTSTRIP.c
…
xt_tcpudp.c
netfilter: x_tables: guard option walkers against 1-byte tail reads
2026-03-10 14:10:42 +01:00
xt_TEE.c
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
xt_time.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-03-19 14:16:00 -07:00
xt_TPROXY.c
…
xt_TRACE.c
…
xt_u32.c
…