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Ciaby ciaby at autistici.orgOn 11/10/2014 01:44 PM, Holger Hans Peter Freyther wrote: > On Mon, Nov 10, 2014 at 12:16:47PM -0600, Ciaby wrote: > > >> Sometimes osmo-nitb crashes, and our users have reported the fact that sometimes they end up listening to someone's else conversation. > > ouch! > >> This started to happen since we enabled handover. >> This is the backtrace i got from a core dump of osmo-nitb: >> >> (gdb) bt > > Can you please make a "bt full" so we see the values of > structures > >> Any clue about why this is happening? > > Yes. "abnormal" condition. So somehow conn->subscr = NULL. This > means the subscriber was never loaded from the database or what > is more likely is that subscr_con_free has been called for the > old channel. > > subscr_name(ho->old_lchan->conn->subscr) > > is crashing because subscr is 0x0. I wonder about the state of > conn and the old_lchan in general. My guess would be that the > old_lchan has already failed. Here comes the "bt full" output: #0 subscr_name (subscr=0x0) at gsm_subscriber_base.c:47 No locals. #1 0x00000000004079e3 in ho_gsm48_ho_compl (new_lchan=0x7fb1a80dd0b0) at handover_logic.c:259 net = 0x894690 ho = 0xe1ccb0 #2 ho_logic_sig_cb (signal_data=<optimized out>, signal=<optimized out>, subsys=<optimized out>, handler_data=<optimized out>) at handover_logic.c:353 lchan = 0x7fb1a80dd0b0 #3 ho_logic_sig_cb (subsys=<optimized out>, signal=<optimized out>, handler_data=<optimized out>, signal_data=<optimized out>) at handover_logic.c:335 lchan_data = <optimized out> #4 0x00007fb1a76dccec in osmo_signal_dispatch (subsys=4, signal=3, signal_data=0x7ffffe668090) at signal.c:105 handler = 0x7af060 #5 0x0000000000408d25 in handle_rr_ho_compl (msg=<optimized out>) at bsc_api.c:524 sig = {lchan = 0x7fb1a80dd0b0, mr = 0x0} gh = <optimized out> #6 dispatch_dtap (msg=0x2436980, link_id=<optimized out>, conn=0xc8e070) at bsc_api.c:583 api = 0x6757c0 gh = <optimized out> pdisc = <optimized out> rc = <optimized out> #7 gsm0408_rcvmsg (msg=0x2436980, link_id=<optimized out>) at bsc_api.c:657 rc = <optimized out> api = 0x6757c0 lchan = 0x7fb1a80dd0b0 #8 0x000000000041fde1 in abis_rsl_rx_rll (msg=0x2436980) at abis_rsl.c:1682 rllh = 0x2436a0e ts_name = <optimized out> sign_link = <optimized out> rc = 0 sapi = <optimized out> #9 abis_rsl_rcvmsg (msg=0x2436980) at abis_rsl.c:2093 rslh = 0x2436a0e rc = 0 #10 0x00007fb1a74cce5a in handle_ts1_read (bfd=0x90d6b8) at input/ipaccess.c:469 line = 0x90cb00 link = <optimized out> hh = 0x2436a0b msg = 0x2436980 ret = <optimized out> ts_nr = 2 e1i_ts = 0x90d118 #11 ipaccess_fd_cb (bfd=0x90d6b8, what=1) at input/ipaccess.c:603 rc = 0 #12 0x00007fb1a76dca11 in osmo_select_main (polling=0) at select.c:158 flags = 1 ufd = 0x90d6b8 tmp = 0x8aa118 readset = {__fds_bits = {0 <repeats 16 times>}} writeset = {__fds_bits = {0 <repeats 16 times>}} exceptset = {__fds_bits = {0 <repeats 16 times>}} work = 1 rc = <optimized out> no_time = {tv_sec = 0, tv_usec = 0} #13 0x0000000000406e34 in main (argc=<optimized out>, argv=0x7ffffe6684f8) at bsc_hack.c:354 rc = <optimized out> Cheers Ciaby