tree 4bd2dc5e7e82339d6a60ed8e48a3cced9583b4de
parent 53eb4c383deb97b59f1755fe3035ec7992488375
author Paolo Abeni <pabeni@redhat.com> 1595502151 +0200
committer David S. Miller <davem@davemloft.net> 1595530044 -0700

mptcp: mark as fallback even early ones

In the unlikely event of a failure at connect time,
we currently clear the request_mptcp flag - so that
the MPC handshake is not started at all, but the msk
is not explicitly marked as fallback.

This would lead to later insertion of wrong DSS options
in the xmitted packets, in violation of RFC specs and
possibly fooling the peer.

Fixes: e1ff9e82e2ea ("net: mptcp: improve fallback to TCP")
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Tested-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>