panic(ffffffff821d69a2) at panic+0x15c sys/kern/subr_prf.c:207
tcp_output(ffff8000009f7100) at tcp_output+0x2c28 tcp_setpersist sys/netinet/tcp_output.c:1130 [inline]
tcp_output(ffff8000009f7100) at tcp_output+0x2c28 sys/netinet/tcp_output.c:333
tcp_usrreq(fffffd806e964a88,9,fffffd807a9ae100,0,0,ffff800020ad1b38) at tcp_usrreq+0xa45
sosend(fffffd806e964a88,0,ffff800020afaff8,0,0,80) at sosend+0x645 sys/kern/uipc_socket.c:524
dofilewritev(ffff800020ad1b38,4,ffff800020afaff8,0,ffff800020afb0e0) at dofilewritev+0x1b7 sys/kern/sys_generic.c:364
sys_write(ffff800020ad1b38,ffff800020afb090,ffff800020afb0e0) at sys_write+0x83 sys/kern/sys_generic.c:284
syscall(ffff800020afb160) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020afb160) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffb9810, count: 6
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