panic: Assertion in_epoch(net_epoch_preempt) failed, r357793

Getting the following panic after updating to r357793 (expect typos, 
hand copied):

panic: Assertion in_epoch(net_epoch_preempt) failed at 
/usr/src/sys/net/iflib.c:2762

db_trace_self_wrapper()
vpanic()
panic()
iflib_rxeof()
_task_fn_rx()
gtaskqueue_run_locked()
gtaskqueue_thread_loop()
fork_exit()
fork_trampoline()
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---