login: panic: tcp_output: template len != hdrlen - optlen
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
  62236  57317      0         0x2          0    0K syz-executor.0
*295219  57335      0        0x12          0    1  sshd
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
tcp_output(ffff800000a7a100) at tcp_output+0x2c28 tcp_setpersist sys/netinet/tcp_output.c:1130 [inline]
tcp_output(ffff800000a7a100) at tcp_output+0x2c28 sys/netinet/tcp_output.c:333
tcp_usrreq(fffffd806e975c08,9,fffffd806d6c3400,0,0,ffff800020ac1b38) at tcp_usrreq+0xa45
sosend(fffffd806e975c08,0,ffff800020aeb408,0,0,80) at sosend+0x645 sys/kern/uipc_socket.c:524
dofilewritev(ffff800020ac1b38,4,ffff800020aeb408,0,ffff800020aeb4f0) at dofilewritev+0x1b7 sys/kern/sys_generic.c:364
sys_write(ffff800020ac1b38,ffff800020aeb4a0,ffff800020aeb4f0) at sys_write+0x83 sys/kern/sys_generic.c:284
syscall(ffff800020aeb570) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020aeb570) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,4,8e421f1616b,4,4,8e6c4eb1080) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc4cb0, count: 6
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ddb{1}> 
ddb{1}>