linux-kernel - [PATCH net 0/5] mptcp: avoid dup NL events and propagate error

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Message-Id: <20260127-net-mptcp-dup-nl-events-v1-0-7f71e1bc4feb@kernel.org>
Date: Tue, 27 Jan 2026 20:27:22 +0100
From: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
To: Mat Martineau <martineau@...nel.org>, Geliang Tang <geliang@...nel.org>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Simon Horman <horms@...nel.org>, Shuah Khan <shuah@...nel.org>
Cc: netdev@...r.kernel.org, mptcp@...ts.linux.dev, 
 linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 "Matthieu Baerts (NGI0)" <matttbe@...nel.org>, stable@...r.kernel.org, 
 Marco Angaroni <marco.angaroni@...ltel.com>
Subject: [PATCH net 0/5] mptcp: avoid dup NL events and propagate error

Here are two fixes affecting the MPTCP Netlink events with their tests:

- Patches 1 & 2: a subflow closed NL event was visible multiple times in
  some specific conditions. A fix for v5.12.

- Patches 3 & 4: subflow closed NL events never contained the error
  code, even when expected. A fix for v5.11.

Plus an extra fix:

- Patch 5: fix a false positive with the "signal addresses race test"
  subtest when validating the MPTCP Join selftest on a v5.15.y stable
  kernel.

Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
---
Matthieu Baerts (NGI0) (5):
      mptcp: avoid dup SUB_CLOSED events after disconnect
      selftests: mptcp: check no dup close events after error
      mptcp: only reset subflow errors when propagated
      selftests: mptcp: check subflow errors in close events
      selftests: mptcp: join: fix local endp not being tracked

 net/mptcp/protocol.c                            | 13 ++--
 tools/testing/selftests/net/mptcp/mptcp_join.sh | 81 ++++++++++++++++++++++---
 2 files changed, 81 insertions(+), 13 deletions(-)
---
base-commit: e9acda52fd2ee0cdca332f996da7a95c5fd25294
change-id: 20260127-net-mptcp-dup-nl-events-64f970f274b0

Best regards,
-- 
Matthieu Baerts (NGI0) <matttbe@...nel.org>