[PATCH v1 net-next 0/2] net: Disallow buggy TCP transitions and IPV6_ADDRFORM.

The following operations have recently received a lot of AI-driven
bug reports:

  * listen() + shutdown() + connect()
  * connect() + connect(AF_UNSPEC) + listen()

  * setsockopt(IPV6_ADDRFORM)

They are not worth fixing by churning the fast path, so this series
disallows the transitions and removes IPV6_ADDRFORM.

  https://lore.kernel.org/netdev/CANn89i+px52TtJy3S9=uHxGj3s-WueguRo1Z_4FxO=02KLmwmQ@mail.gmail.com/ (local)
  https://lore.kernel.org/netdev/5832ba17-c096-4f07-aa73-2e2bb6f79856@redhat.com/ (local)

I did not add Fixes tags, but if we want to backport, the tag
would be:

  Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")


Kuniyuki Iwashima (2):
  tcp: Do not allow buggy transitions between ehash and lhash2.
  ipv6: Remove IPV6_ADDRFORM.

 include/linux/net.h                |  2 +-
 include/net/inet_connection_sock.h |  1 +
 net/core/sock.c                    |  4 +-
 net/ipv4/af_inet.c                 |  3 --
 net/ipv4/inet_connection_sock.c    |  1 +
 net/ipv4/inet_hashtables.c         | 11 ++++
 net/ipv6/af_inet6.c                |  4 --
 net/ipv6/ipv6_sockglue.c           | 87 ------------------------------
 8 files changed, 15 insertions(+), 98 deletions(-)

-- 
2.55.0.1003.g10538fe699-goog