Hello!

We had several crashs of Kamailio (5.3.4) in the last weeks. Each time, the last logs are:

/usr/local/sbin/kamailio[20942]: CRITICAL: <core> [core/forward.c:347]: get_send_socket2(): unsupported proto 0 (*)

/usr/local/sbin/kamailio[20966]: CRITICAL: <core> [core/forward.c:347]: get_send_socket2(): unsupported proto 111 (unknown)

When we look to the coredump, here below the first traces:

(gdb) bt

#0  0x00007f70131b3d91 in prepare_new_uac (t=0x7f6fe1d45340, i_req=0x7f7016fbe208, branch=0, uri=0x7fff37142fa0, path=0x7fff37142f80, next_hop=0x7f7016fbe480, fsocket=0x0,

    snd_flags=..., fproto=0, flags=2, instance=0x7fff37142f70, ruid=0x7fff37142f60, location_ua=0x7fff37142f50) at t_fwd.c:463

#1  0x00007f70131b7c42 in add_uac (t=0x7f6fe1d45340, request=0x7f7016fbe208, uri=0x7f7016fbe480, next_hop=0x7f7016fbe480, path=0x7f7016fbe848, proxy=0x0, fsocket=0x0,

    snd_flags=..., proto=0, flags=2, instance=0x7f7016fbe858, ruid=0x7f7016fbe870, location_ua=0x7f7016fbe880) at t_fwd.c:805

#2  0x00007f70131bfebd in t_forward_nonack (t=0x7f6fe1d45340, p_msg=0x7f7016fbe208, proxy=0x0, proto=0) at t_fwd.c:1667

#3  0x00007f701316cf44 in t_relay_to (p_msg=0x7f7016fbe208, proxy=0x0, proto=0, replicate=0) at t_funcs.c:332

#4  0x00007f70131a3a11 in _w_t_relay_to (p_msg=0x7f7016fbe208, proxy=0x0, force_proto=0) at tm.c:1689

#5  0x00007f70131a4c51 in w_t_relay (p_msg=0x7f7016fbe208, _foo=0x0, _bar=0x0) at tm.c:1889

#6  0x00000000005a1f57 in do_action (h=0x7fff37143d90, a=0x7f7016bd1b10, msg=0x7f7016fbe208) at core/action.c:1071

#7  0x00000000005aeb1e in run_actions (h=0x7fff37143d90, a=0x7f7016bd1b10, msg=0x7f7016fbe208) at core/action.c:1576

#8  0x00000000005af1df in run_actions_safe (h=0x7fff37146e90, a=0x7f7016bd1b10, msg=0x7f7016fbe208) at core/action.c:1640

#9  0x000000000066aa50 in rval_get_int (h=0x7fff37146e90, msg=0x7f7016fbe208, i=0x7fff37144238, rv=0x7f7016bd1e60, cache=0x0) at core/rvalue.c:915

#10 0x000000000066f000 in rval_expr_eval_int (h=0x7fff37146e90, msg=0x7f7016fbe208, res=0x7fff37144238, rve=0x7f7016bd1e58) at core/rvalue.c:1913

#11 0x000000000066f453 in rval_expr_eval_int (h=0x7fff37146e90, msg=0x7f7016fbe208, res=0x7fff371446ec, rve=0x7f7016bd2588) at core/rvalue.c:1921

#12 0x00000000005a1a1d in do_action (h=0x7fff37146e90, a=0x7f7016bd2e08, msg=0x7f7016fbe208) at core/action.c:1047

#13 0x00000000005aeb1e in run_actions (h=0x7fff37146e90, a=0x7f7016bcbd20, msg=0x7f7016fbe208) at core/action.c:1576

#14 0x000000000059e97d in do_action (h=0x7fff37146e90, a=0x7f7016ef19b8, msg=0x7f7016fbe208) at core/action.c:695

#15 0x00000000005aeb1e in run_actions (h=0x7fff37146e90, a=0x7f7016e3f578, msg=0x7f7016fbe208) at core/action.c:1576

#16 0x000000000059e97d in do_action (h=0x7fff37146e90, a=0x7f7016c220a0, msg=0x7f7016fbe208) at core/action.c:695

#17 0x00000000005aeb1e in run_actions (h=0x7fff37146e90, a=0x7f7016c220a0, msg=0x7f7016fbe208) at core/action.c:1576

#18 0x00000000005aae93 in do_action (h=0x7fff37146e90, a=0x7f7016c23978, msg=0x7f7016fbe208) at core/action.c:1207

#19 0x00000000005aeb1e in run_actions (h=0x7fff37146e90, a=0x7f7016c20748, msg=0x7f7016fbe208) at core/action.c:1576

#20 0x00000000005a1ec6 in do_action (h=0x7fff37146e90, a=0x7f7016c576a0, msg=0x7f7016fbe208) at core/action.c:1062

#21 0x00000000005aeb1e in run_actions (h=0x7fff37146e90, a=0x7f7016c0b770, msg=0x7f7016fbe208) at core/action.c:1576

#22 0x000000000059e97d in do_action (h=0x7fff37146e90, a=0x7f7016bc9920, msg=0x7f7016fbe208) at core/action.c:695

#23 0x00000000005aeb1e in run_actions (h=0x7fff37146e90, a=0x7f7016bb9100, msg=0x7f7016fbe208) at core/action.c:1576

#24 0x00000000005af2a7 in run_top_route (a=0x7f7016bb9100, msg=0x7f7016fbe208, c=0x0) at core/action.c:1661

#25 0x00000000005bcb7a in receive_msg (

    buf=0xadbd80 <buf.6971> "INVITE sip:AAAAAAAAAA@W.X.Y.Z SIP/2.0\r\nVia: SIP/2.0/UDP W.X.Y.Z;rport;branch=z9hG4bKZD8Za7p2XF7cF\r\nMax-Forwards: 69\r\nFrom: \"AAAAAAAAAA\" sip:AAAAAAAAAA@W.X.Y.Z;tag=aXy4Na2NtvKBK\r\nTo: <"..., len=1011, rcv_info=0x7fff371474c0) at core/receive.c:423

#26 0x0000000000488e7f in udp_rcv_loop () at core/udp_server.c:548

#27 0x000000000042650f in main_loop () at main.c:1673

#28 0x000000000042ec18 in main (argc=7, argv=0x7fff37147c38) at main.c:2802

Is there anything relevant in this to know what's wrong?

Regards,

Igor.