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You can delete next line and everything above before submitting (it is a comment). --> ### Description Hello, I'm being stuck at debugging a coredump for kamailio 5.3. built at bc5970811d commit, that happened when receiving/forwarding 100 Trying. It is not easily reproducible. I'm stuck at question 1 and 2, below. Please let me know if you have any other ideas of what is happening. Thank you. <!-- Explain what you did, what you expected to happen, and what actually happened. --> #### Debugging Data ``` (gdb) bt #0 0x00005593f836b822 in match_by_name (avp=0xc, id=105, name=0x7ffc060813a8) at core/usr_avp.c:378 #1 0x00005593f836c670 in search_next_avp (s=0x7ffc060813a0, val=0x7ffc06081380) at core/usr_avp.c:499 #2 0x00005593f836c02c in search_avp (ident=..., val=0x7ffc06081380, state=0x7ffc060813a0) at core/usr_avp.c:465 #3 0x00005593f836b9a6 in search_first_avp (flags=1, name=..., val=0x7ffc06081380, s=0x7ffc060813a0) at core/usr_avp.c:414 #4 0x00007f82877df246 in pv_get_avp (msg=0x7f82890e0708, param=0x7f8288ce18d0, res=0x7ffc060814e0) at pv_core.c:1793 #5 0x00005593f839b872 in pv_get_spec_value (msg=0x7f82890e0708, sp=0x7f8288ce18b8, value=0x7ffc060814e0) at core/pvapi.c:1404 #6 0x00005593f81b88f2 in rv_defined (h=0x7ffc06082f80, msg=0x7f82890e0708, res=0x7ffc060816d0, rv=0x7f8288ce18b0, cache=0x0) at core/rvalue.c:1854 #7 0x00005593f81b89ad in int_rve_defined (h=0x7ffc06082f80, msg=0x7f82890e0708, res=0x7ffc060816d0, rve=0x7f8288ce18a8) at core/rvalue.c:1890 #8 0x00005593f81b9fc4 in rval_expr_eval_int (h=0x7ffc06082f80, msg=0x7f82890e0708, res=0x7ffc060816d0, rve=0x7f8288ce2708) at core/rvalue.c:2113 #9 0x00005593f81ec024 in do_action (h=0x7ffc06082f80, a=0x7f8288ce5390, msg=0x7f82890e0708) at core/action.c:1047 #10 0x00005593f81fa61a in run_actions (h=0x7ffc06082f80, a=0x7f8288ce5390, msg=0x7f82890e0708) at core/action.c:1576 #11 0x00005593f81ec523 in do_action (h=0x7ffc06082f80, a=0x7f8288ce54e0, msg=0x7f82890e0708) at core/action.c:1062 #12 0x00005593f81fa61a in run_actions (h=0x7ffc06082f80, a=0x7f8288ce54e0, msg=0x7f82890e0708) at core/action.c:1576 #13 0x00005593f81e8aac in do_action (h=0x7ffc06082f80, a=0x7f8288ffa900, msg=0x7f82890e0708) at core/action.c:695 #14 0x00005593f81fa61a in run_actions (h=0x7ffc06082f80, a=0x7f8288ffa6c8, msg=0x7f82890e0708) at core/action.c:1576 #15 0x00005593f81fae2c in run_top_route (a=0x7f8288ffa6c8, msg=0x7f82890e0708, c=0x7ffc06082f80) at core/action.c:1661 #16 0x00007f828793a44d in reply_received (p_msg=0x7f82890e0708) at t_reply.c:2429 #17 0x00005593f82eb5f5 in do_forward_reply (msg=0x7f82890e0708, mode=0) at core/forward.c:763 #18 0x00005593f82ed46a in forward_reply (msg=0x7f82890e0708) at core/forward.c:864 #19 0x00005593f835b481 in receive_msg ( buf=0x5593f8637640 <buf> "SIP/2.0 100 trying -- your call is important to us\r\nVia: SIP/2.0/UDP "..., len=529, rcv_info=0x7ffc06083520) at core/receive.c:509 #20 0x00005593f8232670 in udp_rcv_loop () at core/udp_server.c:554 #21 0x00005593f819a052 in main_loop () at main.c:1673 #22 0x00005593f81a343b in main (argc=9, argv=0x7ffc06083e68) at main.c:2802 ``` ``` (gdb) frame 0 #0 0x00005593f836b822 in match_by_name (avp=0xc, id=105, name=0x7ffc060813a8) at core/usr_avp.c:378 378 in core/usr_avp.c (gdb) print avp $3 = (avp_t *) 0xc (gdb) print *avp Cannot access memory at address 0xc ``` ``` (gdb) frame 2 #2 0x00005593f836c02c in search_avp (ident=..., val=0x7ffc06081380, state=0x7ffc060813a0) at core/usr_avp.c:465 465 in core/usr_avp.c (gdb) print list $4 = (avp_list_t *) 0x7f8207bb25e0 (gdb) print *list $5 = (avp_list_t) 0x7f821fff4c88 (gdb) print state->avp $6 = (avp_t *) 0xc (gdb) print state->name $7 = {n = -2003544275, s = {s = 0x7f828894572d "lastdst)", len = 7}, re = 0x7f828894572d} (gdb) print state->flags $8 = 497 (gdb) info locals ret = 0x18861c010 st = {flags = 273, id = 10, name = {n = -2000249939, s = {s = 0x7f8288c69bad "mapped_identity_user)", len = 20}, re = 0x7f8288c69bad}, avp = 0x7f823768ba60} list = 0x7f8207bb25e0 __func__ = "search_avp" ``` ``` (gdb) frame 4 #4 0x00007f82877df246 in pv_get_avp (msg=0x7f82890e0708, param=0x7f8288ce18d0, res=0x7ffc060814e0) at pv_core.c:1793 1793 pv_core.c: No such file or directory. (gdb) info locals name_type = 1 avp_name = {n = -2003544275, s = {s = 0x7f828894572d "lastdst)", len = 7}, re = 0x7f828894572d} avp_value = {n = -128721111, s = {s = 0x5593f853df29 "", len = 0}, re = 0x5593f853df29} avp = 0x7f8288dcec50 avp_value0 = {n = 0, s = {s = 0x0, len = -130631258}, re = 0x0} avp0 = 0x7ffc06082f80 idx = 0 idxf = 0 p = 0x200000000 <error: Cannot access memory at address 0x200000000> p_ini = 0x7f82890e0708 "/\031\232" p_size = 21907 n = 0 state = {flags = 497, id = 105, name = {n = -2003544275, s = {s = 0x7f828894572d "lastdst)", len = 7}, re = 0x7f828894572d}, avp = 0xc} __func__ = "pv_get_avp" ``` Question1: In frame 4, shouldn't "state" local variable be all 0's? Question2: In frame 2, shouldn't "state->avp" have the value of "*list"? ### Possible Solutions I've seen there is a static declaration of "state" or "st" inside functions: ``` ./src/modules/avp/avp.c:915: static struct search_state state; ./src/core/usr_avp.c:421: static struct search_state st; ``` ### Additional Information * **Kamailio Version** - output of `kamailio -v` ``` version: kamailio 5.3.8 (x86_64/linux) flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: compiled with gcc 8.3.0 ``` * **Operating System**: ``` Debian 10 ``` -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/2998 You are receiving this because you are subscribed to this thread. 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