linux-kernel - [PATCH net 0/4] mptcp: misc. fixes involving fallback to TCP

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Message-Id: <20241008-net-mptcp-fallback-fixes-v1-0-c6fb8e93e551@kernel.org>
Date: Tue, 08 Oct 2024 13:04:51 +0200
From: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
To: mptcp@...ts.linux.dev, 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>, Florian Westphal <fw@...len.de>, 
 David Ahern <dsahern@...nel.org>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Matthieu Baerts (NGI0)" <matttbe@...nel.org>, stable@...r.kernel.org, 
 syzbot+d1bff73460e33101f0e7@...kaller.appspotmail.com, 
 Christoph Paasch <cpaasch@...le.com>
Subject: [PATCH net 0/4] mptcp: misc. fixes involving fallback to TCP

- Patch 1: better handle DSS corruptions from a bugged peer: reducing
  warnings, doing a fallback or a reset depending on the subflow state.
  For >= v5.7.

- Patch 2: fix DSS corruption due to large pmtu xmit, where MPTCP was
  not taken into account. For >= v5.6.

- Patch 3: fallback when MPTCP opts are dropped after the first data
  packet, instead of resetting the connection. For >= v5.6.

- Patch 4: restrict the removal of a subflow to other closing states, a
  better fix, for a recent one. For >= v5.10.

Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
---
Matthieu Baerts (NGI0) (2):
      mptcp: fallback when MPTCP opts are dropped after 1st data
      mptcp: pm: do not remove closing subflows

Paolo Abeni (2):
      mptcp: handle consistently DSS corruption
      tcp: fix mptcp DSS corruption due to large pmtu xmit

 net/ipv4/tcp_output.c  |  5 +----
 net/mptcp/mib.c        |  2 ++
 net/mptcp/mib.h        |  2 ++
 net/mptcp/pm_netlink.c |  3 ++-
 net/mptcp/protocol.c   | 24 +++++++++++++++++++++---
 net/mptcp/subflow.c    |  6 ++++--
 6 files changed, 32 insertions(+), 10 deletions(-)
---
base-commit: f15b8d6eb63874230e36a45dd24239050a6f6250
change-id: 20241008-net-mptcp-fallback-fixes-16a9afee238e

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