Merge tag 'nf-26-05-22' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf

Florian Westphal says:

====================
netfilter: updates for net

Patches 7+8 fix a regression from 7.1-rc1. Everything else
is from 2.6.x to 5.3 releases.  There are additional known
issues with these patches (drive-by-findings in related code).

There are many old bugs all over netfilter and our ability to review
feature patches has come to a complete halt due to lack of time.
There are further security bugs that we cannot address
due to lack of time, maintainers and reviewers.

Other remarks: The xtables 32bit compat interface is already
off in many vendor kernels, the plan is to remove it soon.

1) Prevent RST packets with invalid sequence numbers from forcing TCP
   connections into the CLOSE state without a direction check.
   From Hamza Mahfooz.
2) Re-derive the TCP header pointer after skb_ensure_writable in
   synproxy_tstamp_adjust. Prevent use-after-free and invalid checksum
   updates caused by stale pointers during buffer expansion.
   From Chris Mason.
3) Fix a race condition causing keymap list corruption in conntracks gre/pptp
   helper.
4) Use raw_smp_processor_id() in xt_cpu to prevent splats under
   PREEMPT_RCU.
5) Disable netfilter payload mangling in user namespaces (nft_payload.c
   and nf_queue).
   TCP option mangling via nft_exthdr.c remains enabled.
   There will be followups here to restrict resp. revalidate
   headers.
6) Fix an out-of-bounds read in ebtables's compat_mtw_from_user function.
7) Use list_for_each_entry_rcu() to traverse fib6_siblings in
   nft_fib6_info_nh_uses_dev(). Ensure safe list walking under RCU.
8) Fix an out-of-bounds read in nft_fib_ipv6 caused by incorrect list
   traversal.
9) Add nft_fib_nexthop selftest to netfilter. Cover nexthop enumeration for
    single, group, and multipath route shapes.
    All three nft_fib6 fixes from Jiayuan Chen.
10) Fix destination corruption in shift operations when source and destination
    registers overlap.  Reject partial register overlap for all operations
    from control plane.  From Fernando Fernandez Mancera.

* tag 'nf-26-05-22' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  netfilter: nf_tables: fix dst corruption in same register operation
  selftests: netfilter: add nft_fib_nexthop test
  netfilter: nft_fib_ipv6: handle routes via external nexthop
  netfilter: nft_fib_ipv6: walk fib6_siblings under RCU
  netfilter: ebtables: fix OOB read in compat_mtw_from_user
  netfilter: disable payload mangling in userns
  netfilter: xt_cpu: prefer raw_smp_processor_id
  netfilter: nf_conntrack_gre: fix gre keymap list corruption
  netfilter: synproxy: refresh tcphdr after skb_ensure_writable
  netfilter: conntrack: tcp: do not force CLOSE on invalid-seq RST without direction check
====================

Link: https://patch.msgid.link/20260522104257.2008-1-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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