[net,0/3] Netfilter fixes for net

Pull-request

git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-24-02-29

Message

Pablo Neira Ayuso Feb. 29, 2024, 12:01 a.m. UTC

Hi,

The following patchset contains Netfilter fixes for net:

Patch #1 restores NFPROTO_INET with nft_compat, from Ignat Korchagin.

Patch #2 fixes an issue with bridge netfilter and broadcast/multicast
packets.

There is a day 0 bug in br_netfilter when used with connection tracking.

Conntrack assumes that an nf_conn structure that is not yet added to
hash table ("unconfirmed"), is only visible by the current cpu that is
processing the sk_buff.

For bridge this isn't true, sk_buff can get cloned in between, and
clones can be processed in parallel on different cpu.

This patch disables NAT and conntrack helpers for multicast packets.

Patch #3 adds a selftest to cover for the br_netfilter bug.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git nf-24-02-29

Thanks.

----------------------------------------------------------------

The following changes since commit 359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79:

  l2tp: pass correct message length to ip6_append_data (2024-02-22 10:42:17 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-24-02-29

for you to fetch changes up to 6523cf516c55db164f8f73306027b1caebb5628e:

  selftests: netfilter: add bridge conntrack + multicast test case (2024-02-29 00:22:48 +0100)

----------------------------------------------------------------
netfilter pull request 24-02-29

----------------------------------------------------------------
Florian Westphal (2):
      netfilter: bridge: confirm multicast packets before passing them up the stack
      selftests: netfilter: add bridge conntrack + multicast test case

Ignat Korchagin (1):
      netfilter: nf_tables: allow NFPROTO_INET in nft_(match/target)_validate()

 include/linux/netfilter.h                          |   1 +
 net/bridge/br_netfilter_hooks.c                    |  96 +++++++++++
 net/bridge/netfilter/nf_conntrack_bridge.c         |  30 ++++
 net/netfilter/nf_conntrack_core.c                  |   1 +
 net/netfilter/nft_compat.c                         |  20 +++
 tools/testing/selftests/netfilter/Makefile         |   3 +-
 .../selftests/netfilter/bridge_netfilter.sh        | 188 +++++++++++++++++++++
 7 files changed, 338 insertions(+), 1 deletion(-)
 create mode 100644 tools/testing/selftests/netfilter/bridge_netfilter.sh