linux/net/ipv6/netfilter
Paolo Abeni aef3a58b06 netfilter pull request 24-09-26
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Merge tag 'nf-24-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

v2: with kdoc fixes per Paolo Abeni.

The following patchset contains Netfilter fixes for net:

Patch #1 and #2 handle an esoteric scenario: Given two tasks sending UDP
packets to one another, two packets of the same flow in each direction
handled by different CPUs that result in two conntrack objects in NEW
state, where reply packet loses race. Then, patch #3 adds a testcase for
this scenario. Series from Florian Westphal.

1) NAT engine can falsely detect a port collision if it happens to pick
   up a reply packet as NEW rather than ESTABLISHED. Add extra code to
   detect this and suppress port reallocation in this case.

2) To complete the clash resolution in the reply direction, extend conntrack
   logic to detect clashing conntrack in the reply direction to existing entry.

3) Adds a test case.

Then, an assorted list of fixes follow:

4) Add a selftest for tproxy, from Antonio Ojea.

5) Guard ctnetlink_*_size() functions under
   #if defined(CONFIG_NETFILTER_NETLINK_GLUE_CT) || defined(CONFIG_NF_CONNTRACK_EVENTS)
   From Andy Shevchenko.

6) Use -m socket --transparent in iptables tproxy documentation.
   From XIE Zhibang.

7) Call kfree_rcu() when releasing flowtable hooks to address race with
   netlink dump path, from Phil Sutter.

8) Fix compilation warning in nf_reject with CONFIG_BRIDGE_NETFILTER=n.
   From Simon Horman.

9) Guard ctnetlink_label_size() under CONFIG_NF_CONNTRACK_EVENTS which
   is its only user, to address a compilation warning. From Simon Horman.

10) Use rcu-protected list iteration over basechain hooks from netlink
    dump path.

11) Fix memcg for nf_tables, use GFP_KERNEL_ACCOUNT is not complete.

12) Remove old nfqueue conntrack clash resolution. Instead trying to
    use same destination address consistently which requires double DNAT,
    use the existing clash resolution which allows clashing packets
    go through with different destination. Antonio Ojea originally
    reported an issue from the postrouting chain, I proposed a fix:
    https://lore.kernel.org/netfilter-devel/ZuwSwAqKgCB2a51-@calendula/T/
    which he reported it did not work for him.

13) Adds a selftest for patch 12.

14) Fixes ipvs.sh selftest.

netfilter pull request 24-09-26

* tag 'nf-24-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  selftests: netfilter: Avoid hanging ipvs.sh
  kselftest: add test for nfqueue induced conntrack race
  netfilter: nfnetlink_queue: remove old clash resolution logic
  netfilter: nf_tables: missing objects with no memcg accounting
  netfilter: nf_tables: use rcu chain hook list iterator from netlink dump path
  netfilter: ctnetlink: compile ctnetlink_label_size with CONFIG_NF_CONNTRACK_EVENTS
  netfilter: nf_reject: Fix build warning when CONFIG_BRIDGE_NETFILTER=n
  netfilter: nf_tables: Keep deleted flowtable hooks until after RCU
  docs: tproxy: ignore non-transparent sockets in iptables
  netfilter: ctnetlink: Guard possible unused functions
  selftests: netfilter: nft_tproxy.sh: add tcp tests
  selftests: netfilter: add reverse-clash resolution test case
  netfilter: conntrack: add clash resolution for reverse collisions
  netfilter: nf_nat: don't try nat source port reallocation for reverse dir clash
====================

Link: https://patch.msgid.link/20240926110717.102194-1-pablo@netfilter.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2024-09-26 15:47:11 +02:00
..
ip6_tables.c netfilter: Use kmemdup_array instead of kmemdup for multiple allocation 2024-09-03 10:47:16 +02:00
ip6t_ah.c netfilter: ip6tables: Remove redundant null checks 2020-07-29 20:39:43 +02:00
ip6t_eui64.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ip6t_frag.c netfilter: ip6tables: Remove redundant null checks 2020-07-29 20:39:43 +02:00
ip6t_hbh.c netfilter: ip6tables: Remove redundant null checks 2020-07-29 20:39:43 +02:00
ip6t_ipv6header.c netfilter: move inline nf_ip6_ext_hdr() function to a more appropriate header. 2019-09-13 12:34:09 +02:00
ip6t_mh.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ip6t_NPT.c netfilter: ip6t_NPT: rewrite addresses in ICMPv6 original packet 2020-08-28 19:18:48 +02:00
ip6t_REJECT.c netfilter: use actual socket sk for REJECT action 2020-12-01 14:33:55 +01:00
ip6t_rpfilter.c netfilter: ip6t_rpfilter: Fix regression with VRF interfaces 2023-02-22 00:22:20 +01:00
ip6t_rt.c netfilter: ip6t_rt: fix rt0_hdr parsing in rt_mt6 2021-10-14 23:08:35 +02:00
ip6t_srh.c
ip6t_SYNPROXY.c netfilter: Add MODULE_DESCRIPTION entries to kernel modules 2020-06-25 00:50:31 +02:00
ip6table_filter.c netfilter: use NF_DROP instead of -NF_DROP 2024-05-06 16:29:21 +02:00
ip6table_mangle.c netfilter: xt_mangle: only check verdict part of return value 2023-10-18 10:26:43 +02:00
ip6table_nat.c netfilter: iptables: Fix potential null-ptr-deref in ip6table_nat_table_init(). 2024-07-31 23:21:34 +02:00
ip6table_raw.c netfilter: add missing module descriptions 2023-11-08 13:52:32 +01:00
ip6table_security.c netfilter: ip6tables: allow use of ip6t_do_table as hookfn 2021-10-14 23:06:53 +02:00
Kconfig netfilter: xtables: allow xtables-nft only builds 2024-01-29 15:43:21 +01:00
Makefile netfilter: xtables: allow xtables-nft only builds 2024-01-29 15:43:21 +01:00
nf_conntrack_reasm.c netfilter: allow ipv6 fragments to arrive on different devices 2024-08-14 21:16:12 +02:00
nf_defrag_ipv6_hooks.c netfilter: add missing module descriptions 2023-11-08 13:52:32 +01:00
nf_dup_ipv6.c netfilter: drop bridge nf reset from nf_reset 2019-10-01 18:42:15 +02:00
nf_reject_ipv6.c netfilter pull request 24-09-26 2024-09-26 15:47:11 +02:00
nf_socket_ipv6.c tcp: Access &tcp_hashinfo via net. 2022-09-20 10:21:49 -07:00
nf_tproxy_ipv6.c netfilter: tproxy: fix deadlock due to missing BH disable 2023-03-06 12:09:48 +01:00
nft_dup_ipv6.c netfilter: nf_tables: pass context structure to nft_parse_register_load 2024-08-20 12:37:24 +02:00
nft_fib_ipv6.c netfilter: rpfilter/fib: Set ->flowic_uid correctly for user namespaces. 2022-10-19 08:46:48 +02:00
nft_reject_ipv6.c netfilter: nf_tables: do not reduce read-only expressions 2022-03-20 00:29:46 +01:00