netdev - [PATCH net 0/5] mptcp: fix incoming options parsing

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Date:   Wed, 29 Apr 2020 12:41:44 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     netdev@...r.kernel.org
Cc:     Eric Dumazet <edumazet@...gle.com>,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        Matthieu Baerts <matthieu.baerts@...sares.net>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Christoph Paasch <cpaasch@...le.com>, mptcp@...ts.01.org
Subject: [PATCH net 0/5] mptcp: fix incoming options parsing

This series addresses a serious issue in MPTCP option parsing.

This is bigger than the usual -net change, but I was unable to find a
working, sane, smaller fix.

The core change is inside patch 2/5 which moved MPTCP options parsing from
the TCP code inside existing MPTCP hooks and clean MPTCP options status on
each processed packet.

The patch 1/5 is a needed pre-requisite, and patches 3,4,5 are smaller,
related fixes.

Paolo Abeni (5):
  mptcp: consolidate synack processing.
  mptcp: move option parsing into mptcp_incoming_options()
  mptcp: avoid a WARN on bad input.
  mptcp: fix 'use_ack' option access.
  mptcp: initialize the data_fin field for mpc packets

 include/linux/tcp.h  | 51 ------------------------
 include/net/mptcp.h  |  3 --
 net/ipv4/tcp_input.c |  7 ----
 net/mptcp/options.c  | 95 +++++++++++++++++++-------------------------
 net/mptcp/protocol.c |  6 +--
 net/mptcp/protocol.h | 43 +++++++++++++++++++-
 net/mptcp/subflow.c  | 81 +++++++++++++++++++++++--------------
 7 files changed, 137 insertions(+), 149 deletions(-)

-- 
2.21.1