Merge branch 'mptcp-misc-fixes-for-v7-2-rc6'

Matthieu Baerts says:

====================
mptcp: misc fixes for v7.2-rc6

Here are various unrelated fixes:

- Patches 1-3: harden incoming MPTCP suboptions parsing by rejecting
  non-combinable ones. Patch 3 removes unreachable code after patch 2
  added here for consistency, and to reduce comments from AI reviews.
  Fixes for v5.6.

- Patch 4: fix a data race in the ADD_ADDR timer callback. A fix for
  v5.13.

- Patch 5: correctly catch data corruption during the MPTCP join
  selftest by marking tests as failed, instead of only printing a
  warning. A fix for v5.18.

- Patch 6: fix a leak with the userspace ADD_ADDR list in case of race
  condition during teardown. A fix for v5.19.

- Patch 7: deal with MPTFO with a valid token, but no data in the SYN. A
  fix for v6.2.

- Patch 8: reclaim forward-allocated memory in case of error on the
  receive side. A fix for v6.19.
====================

Link: https://patch.msgid.link/20260803-net-mptcp-misc-fixes-7-2-rc6-v2-0-b8f496d71664@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>