panic: tcp_do_segment: sent too much

+ export 'tcpINCARNATIONS=16678'
+ [ 16678 -le 0 ]
+ export 'TESTPROGS= ./testcases/tcp/tcp'
+ sleep 900
+ su test -c '(cd ..; ./testcases/run/run $TESTPROGS)'
     run: run time  0+00:15:00, incarnations   1, load 100, verbose 1
23:59:21 Loop #1
     tcp: run time  0+00:02:00, incarnations 3202, load 100, verbose 1
witness_lock_list_get: witness exhausted
panic: tcp_do_segment: sent too much
cpuid = 6
time = 1729634436
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe01081bd9b0
vpanic() at vpanic+0x13f/frame 0xfffffe01081bdae0
panic() at panic+0x43/frame 0xfffffe01081bdb40
tcp_do_segment() at tcp_do_segment+0x29a2/frame 0xfffffe01081bdc20
tcp_input_with_port() at tcp_input_with_port+0x10e5/frame 0xfffffe01081bdd70
tcp_input() at tcp_input+0xb/frame 0xfffffe01081bdd80
ip_input() at ip_input+0x28f/frame 0xfffffe01081bdde0
swi_net() at swi_net+0x19b/frame 0xfffffe01081bde60
ithread_loop() at ithread_loop+0x266/frame 0xfffffe01081bdef0
fork_exit() at fork_exit+0x82/frame 0xfffffe01081bdf30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe01081bdf30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---

Details @ https://people.freebsd.org/~pho/stress/log/log0557.txt

- Peter