Greg recently reported 6 patches that could not be applied without conflicts in v5.15:
- e32d262c89e2 ("mptcp: handle consistently DSS corruption") - 4dabcdf58121 ("tcp: fix mptcp DSS corruption due to large pmtu xmit") - 119d51e225fe ("mptcp: fallback when MPTCP opts are dropped after 1st data") - 7decd1f5904a ("mptcp: pm: fix UaF read in mptcp_pm_nl_rm_addr_or_subflow") - 3d041393ea8c ("mptcp: prevent MPC handshake on port-based signal endpoints") - 5afca7e996c4 ("selftests: mptcp: join: test for prohibited MPC to port-based endp")
Conflicts have been resolved for the 5 first ones, and documented in each patch.
The last patch has not been backported: this is an extra test for the selftests validating the previous commit, and there are a lot of conflicts. That's fine not to backport this test, it is still possible to use the selftests from a newer version and run them on this older kernel.
One extra commit has been backported, to support allow_infinite_fallback which is used by two commits from the list above:
- 0530020a7c8f ("mptcp: track and update contiguous data status")
Geliang Tang (1): mptcp: track and update contiguous data status
Matthieu Baerts (NGI0) (2): mptcp: fallback when MPTCP opts are dropped after 1st data mptcp: pm: fix UaF read in mptcp_pm_nl_rm_addr_or_subflow
Paolo Abeni (3): mptcp: handle consistently DSS corruption tcp: fix mptcp DSS corruption due to large pmtu xmit mptcp: prevent MPC handshake on port-based signal endpoints
net/ipv4/tcp_output.c | 2 +- net/mptcp/mib.c | 3 +++ net/mptcp/mib.h | 3 +++ net/mptcp/pm_netlink.c | 3 ++- net/mptcp/protocol.c | 23 ++++++++++++++++++++--- net/mptcp/protocol.h | 2 ++ net/mptcp/subflow.c | 19 ++++++++++++++++--- 7 files changed, 47 insertions(+), 8 deletions(-)