panic: tcp_default_fb_init: connection 0xfffffe00776d4a80 in unexpected state 10
cpuid = 0
time = 6
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056ec8290
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056ec83f0
vpanic() at vpanic+0x257/frame 0xfffffe0056ec85b0
panic() at panic+0xb5/frame 0xfffffe0056ec8680
tcp_default_fb_init() at tcp_default_fb_init+0x697/frame 0xfffffe0056ec86d0
tcp_ctloutput_set() at tcp_ctloutput_set+0x607/frame 0xfffffe0056ec8850
tcp_ctloutput() at tcp_ctloutput+0x128/frame 0xfffffe0056ec8950
sosetopt() at sosetopt+0x236/frame 0xfffffe0056ec8b50
kern_setsockopt() at kern_setsockopt+0x2b0/frame 0xfffffe0056ec8cc0
sys_setsockopt() at sys_setsockopt+0x77/frame 0xfffffe0056ec8d10
amd64_syscall() at amd64_syscall+0x4e2/frame 0xfffffe0056ec8f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0056ec8f30
--- syscall (198, FreeBSD ELF64, __syscall), rip = 0x3a197a, rsp = 0x826e74f08, rbp = 0x826e74f80 ---
KDB: enter: panic
[ thread pid 981 tid 100335 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x25b7ed7(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db>