Cellular Network Infrastructure » Core Network (CN) » osmo-sip-connector

The crash might be related to a crash of osmo-msc: https://osmocom.org/issues/4160

Apparently the crash can be provoked when osmo-msc is terminated and a call to an MS is made via sip landline. Then osmo-sip-connector should crash.

#0  osmo_fd_unregister (fd=fd@entry=0x555555762b68 <g_app+104>) at select.c:141
#1  0x000055555555a90d in close_connection (conn=0x555555762b58 <g_app+88>) at mncc.c:327
#2  0x000055555555cb5c in mncc_create_remote_leg (conn=0x555555762b58 <g_app+88>, call=call@entry=0x55555580b690) at mncc.c:907
#3  0x00005555555588fa in route_to_mncc (call=0x55555580b690) at app.c:77
#4  app_route_call (call=call@entry=0x55555580b690, source=0x55555580d180 "2600", dest=dest@entry=0x55555580ad10 "23001") at app.c:97
#5  0x0000555555559fee in new_call (sip=0x555555807e58, nh=0x55555580a160, agent=0x555555762b20 <g_app+32>) at sip.c:180
#6  nua_callback (event=<optimized out>, status=<optimized out>, phrase=<optimized out>, nua=<optimized out>, magic=0x555555762b20 <g_app+32>, nh=0x55555580a160, hmagic=0x0, sip=0x555555807e58, tags=0x55555580b5a0) at sip.c:399
#7  0x00007ffff78efc34 in ?? () from /usr/lib/libsofia-sip-ua.so.0
#8  0x00007ffff7940362 in ?? () from /usr/lib/libsofia-sip-ua.so.0
#9  0x00007ffff7bd5e50 in ?? () from /usr/lib/libsofia-sip-ua-glib.so.3
#10 0x00007ffff757a7f7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007ffff757aa60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007ffff757ad82 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x0000555555557e0c in main (argc=3, argv=0x7fffffffe208) at main.c:184

#0  osmo_fd_unregister (fd=fd@entry=0x555555762b68 <g_app+104>) at select.c:141
No locals.
#1  0x000055555555a90d in close_connection (conn=0x555555762b58 <g_app+88>) at mncc.c:327
No locals.
#2  0x000055555555cb5c in mncc_create_remote_leg (conn=0x555555762b58 <g_app+88>, call=call@entry=0x55555580b690) at mncc.c:907
        leg = 0x55555580d1f0
        mncc = {msg_type = 257, callref = 5012, fields = 6, bearer_cap = {transfer = 0, mode = 0, coding = 0, radio = 0, speech_ctm = 0, speech_ver = {0, 0, 0, 0, 0, 0, 0, 0}, data = {rate_adaption = GSM48_BCAP_RA_NONE, sig_access = 0, async = 0, nr_stop_bits = 0, 
              nr_data_bits = 0, user_rate = 0, parity = GSM48_BCAP_PAR_ODD, interm_rate = 0, transp = GSM48_BCAP_TR_TRANSP, modem_type = GSM48_BCAP_MT_NONE}}, called = {type = 0, plan = 1, present = 0, screen = 0, number = "23001", '\000' <repeats 27 times>}, 
          calling = {type = 0, plan = 1, present = 0, screen = 0, number = "2600", '\000' <repeats 28 times>}, redirecting = {type = 0, plan = 0, present = 0, screen = 0, number = '\000' <repeats 32 times>}, connected = {type = 0, plan = 0, present = 0, screen = 0, 
            number = '\000' <repeats 32 times>}, cause = {location = 0, coding = 0, rec = 0, rec_val = 0, value = 0, diag_len = 0, diag = '\000' <repeats 31 times>}, progress = {coding = 0, location = 0, descr = 0}, useruser = {proto = 0, 
            info = '\000' <repeats 128 times>}, facility = {len = 0, info = '\000' <repeats 127 times>}, cccap = {dtmf = 0, pcp = 0}, ssversion = {len = 0, info = '\000' <repeats 127 times>}, clir = {sup = 0, inv = 0}, signal = 0, keypad = 0, more = 0, notify = 0, 
          emergency = 0, imsi = '\000' <repeats 15 times>, lchan_type = 0 '\000', lchan_mode = 0 '\000'}
        rc = <optimized out>
#3  0x00005555555588fa in route_to_mncc (call=0x55555580b690) at app.c:77
No locals.
#4  app_route_call (call=call@entry=0x55555580b690, source=0x55555580d180 "2600", dest=dest@entry=0x55555580ad10 "23001") at app.c:97
No locals.
#5  0x0000555555559fee in new_call (sip=0x555555807e58, nh=0x55555580a160, agent=0x555555762b20 <g_app+32>) at sip.c:180
        call = 0x55555580b690
        from = 0x5555558083bd "2600" 
        ip_addr = "10.9.1.122\000UUU\000" 
        net = {s_addr = 2046888202}
        leg = 0x55555580cf60
        to = <optimized out>
#6  nua_callback (event=<optimized out>, status=<optimized out>, phrase=<optimized out>, nua=<optimized out>, magic=0x555555762b20 <g_app+32>, nh=0x55555580a160, hmagic=0x0, sip=0x555555807e58, tags=0x55555580b5a0) at sip.c:399
        leg = <optimized out>
#7  0x00007ffff78efc34 in ?? () from /usr/lib/libsofia-sip-ua.so.0
No symbol table info available.
#8  0x00007ffff7940362 in ?? () from /usr/lib/libsofia-sip-ua.so.0
No symbol table info available.
#9  0x00007ffff7bd5e50 in ?? () from /usr/lib/libsofia-sip-ua-glib.so.3
No symbol table info available.
#10 0x00007ffff757a7f7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#11 0x00007ffff757aa60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#12 0x00007ffff757ad82 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#13 0x0000555555557e0c in main (argc=3, argv=0x7fffffffe208) at main.c:184
        rc = <optimized out>
        loop = 0x555555763e60

I have investigated this and I found out that close_connection() does call osmo_fd_unregister(). For some reason the osmo-fd is not registered in this special case. Lets check using osmo_fd_is_registered() before we unregister the fd.

See also: https://gerrit.osmocom.org/c/osmo-sip-connector/+/15303 mncc: do not unregister unregistered osmo fds

patch was merged