The following unit test: 96: system-traffic.at:4109 conntrack - fragment reassembly with L3 L4 protocol information always fails for target check-kernel. Bisecting, it appears that the offending commit is the following (although at first glance the change seems ok): 323ae1e808e6 ("ofproto-dpif-xlate: Fix recirculation when in_port is OFPP_CONTROLLER.")
Fix posted upstream: https://patchwork.ozlabs.org/project/openvswitch/patch/164885606703.1395853.12160696739041080838.stgit@fed.void/