[OpenSIPS-Users] opensips tm timer core dump

[Kennard_White at logitech.com]

Running against opensips HEAD, I got a segfault in the tm timer code. I
believe this is triggered by running out of shared memory.


The stack trace:

(gdb) where
#0  0x00007fe8f8d96212 in insert_timer_unsafe (new_tl=0x7fe8f66337b0,
    list_id=WT_TIMER_LIST, ext_timeout=<value optimized out>) at
timer.c:731
#1  set_1timer (new_tl=0x7fe8f66337b0, list_id=WT_TIMER_LIST,
    ext_timeout=<value optimized out>) at timer.c:904
#2  0x00007fe8f8d78ac8 in t_release_transaction (trans=0x7fe8f6633730)
    at t_funcs.c:122
#3  0x00007fe8f8d808e5 in t_unref (p_msg=<value optimized out>)
    at t_lookup.c:1152
#4  0x0000000000483ae5 in exec_post_req_cb ()
#5  0x000000000046c1e4 in receive_msg ()
#6  0x00000000004bc77c in udp_rcv_loop ()
#7  0x000000000042de9c in main ()

The offending code (I believe):
 	if (tl->time_out==ptr->time_out) {
                tl->ld_tl = ptr->ld_tl
                ptr->ld_tl = 0;
                tl->ld_tl->ld_tl = tl;   <-- SEG FAULT HERE (according to
trace)
        } else {
                tl->ld_tl = tl;
        }

Unfortunately, due to optimization I cannot dump anything useful, and I'm
not convinced the actual fault is on the line indicated. Note that the core
dump is not one of the processes that reported out of memory. Maybe one of
the other processes left the timer list in a corrupt state?

The log file:
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22255]:
ERROR:tm:sip_msg_cloner: no more share memory
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22255]:
ERROR:tm:new_t: out of mem
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22255]:
ERROR:tm:t_newtran: new_t failed
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22254]:
WARNING:core:fm_malloc: Not enough free memory, will atempt defragmenation
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22254]:
ERROR:tm:sip_msg_cloner: no more share memory
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22254]:
ERROR:tm:new_t: out of mem
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22254]:
ERROR:tm:t_newtran: new_t failed
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22238]:
INFO:core:handle_sigs: child process 22255 exited by a signal 11
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22238]:
INFO:core:handle_sigs: core was generated
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22238]:
INFO:core:handle_sigs: terminating due to SIGCHLD
Sep 29 11:43:36 org-sip01 /var/run/openser/opensips-pres[22256]:
INFO:core:sig_usr: signal 15 received
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