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. v1 -> v2: - cleaned-up patch 1/5 - rebased on top of current -net 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 | 82 ++++++++++++++++++++++++-------------- 7 files changed, 138 insertions(+), 149 deletions(-) -- 2.21.1
