I'm afraid that core files has been deleted. Anyway, after test your patch, it seems there are still have issues.
#### So, let's from the ground up again:
I will attach **two** back trace below, one is crashed **BEFORE your patch** that I reproduced, the other one is crashed **AFTER your patch**
both tested under `kamailio-4.3.1 stable` with only recompiled `jsonrpc-c.so` if you need any further info, just let me know which corefiles and the gdb command.
I will keep corefiles this time : )
#### bt_BEFORE_patch.corefile
``` #0 0x00007fdc4c1e03bf in json_tokener_parse_ex () from /lib/x86_64-linux-gnu/libjson.so.0 No symbol table info available. #1 0x00007fdc4c1e1da6 in json_tokener_parse_verbose () from /lib/x86_64-linux-gnu/libjson.so.0 No symbol table info available. #2 0x00007fdc4c1e1dfe in json_tokener_parse () from /lib/x86_64-linux-gnu/libjson.so.0 No symbol table info available. #3 0x00007fdc4c3eae1a in cmd_pipe_cb (fd=6, event=2, arg=0x7ffff51d9750) at jsonrpc_io.c:152 cmd = 0x7fdc71690608 __FUNCTION__ = "cmd_pipe_cb" params = 0x15d4bf0 payload = 0x2ea971e6 req = 0x1c3115d json = 0x7ffff51d95f0 "\200M]\001" ns = 0x7fdc73cce438 "201:{ "jsonrpc": "2.0", "method": "last_reg", "params": { "user": "5978002", "data": [ "1440567940", "5978002", "sip:5978002@38.106.57.69:5060;transport=TCP", "SIPp\/Linux", "tcp:38.106.57.68:5003" "... bytes = 140737305744928 g = 0x7fdc4bfa22f8 sent = 0 #4 0x00007fdc4bfa5254 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5 No symbol table info available. #5 0x00007fdc4c3ea5ef in jsonrpc_io_child_process (cmd_pipe=6, _servers=0x7fdc738b16e8 "10.1.4.3:5013,3 10.1.4.1:5013,2 10.1.4.2:5013,1") at jsonrpc_io.c:93 __FUNCTION__ = "jsonrpc_io_child_process" pipe_ev = {ev_active_next = {tqe_next = 0x0, tqe_prev = 0x15cdf10}, ev_next = {tqe_next = 0x7fdc73cce1f8, tqe_prev = 0x15d4d50}, ev_timeout_pos = {ev_next_with_common_timeout = { tqe_next = 0xffffffff, tqe_prev = 0x0}, min_heap_idx = -1}, ev_fd = 6, ev_base = 0x15d4bf0, _ev = {ev_io = {ev_io_next = {tqe_next = 0x0, tqe_prev = 0x15d5120}, ev_timeout = {tv_sec = 0, tv_usec = 0}}, ev_signal = {ev_signal_next = {tqe_next = 0x0, tqe_prev = 0x15d5120}, ev_ncalls = 0, ev_pncalls = 0x0}}, ev_events = 18, ev_res = 2, ev_flags = 130, ev_pri = 0 '\000', ev_closure = 2 '\002', ev_timeout = {tv_sec = 140733193388081, tv_usec = 8407324624}, ev_callback = 0x7fdc4c3eaaa7 <cmd_pipe_cb+8>, ev_arg = 0x7ffff51d9750} #6 0x00007fdc4c3f350b in child_init (rank=0) at jsonrpc_mod.c:130 pid = 0 #7 0x0000000000596a41 in init_mod_child (m=0x7fdc738a7db8, rank=0) at sr_module.c:898 __FUNCTION__ = "init_mod_child" #8 0x0000000000596779 in init_mod_child (m=0x7fdc738a8110, rank=0) at sr_module.c:895 __FUNCTION__ = "init_mod_child" #9 0x0000000000596d55 in init_child (rank=0) at sr_module.c:924 No locals. #10 0x00000000004aafd3 in main_loop () at main.c:1650 i = 24 pid = 106880 si = 0x0 si_desc = "udp receiver child=23 sock=38.106.57.68:5003\000\000\000\000~/q\000\001\000\000\000\260TkQ\334\177\000\000\000\232\035\365\377\177\000\000\032\264N\000\000\000\000\000P\232\035\365\377\177\000\000\270:\312s\334\177\000\000\310K\270Q\334\177\000\000\260TkQ\334\177\000\000N\354\070p\000\000\000\000\260\210A\000\001\000\000" nrprocs = 24 __FUNCTION__ = "main_loop" #11 0x00000000004b0b5b in main (argc=13, argv=0x7ffff51d9cc8) at main.c:2533 cfg_stream = 0x152e010 c = -1 r = 0 tmp = 0x7ffff51db7c1 "" tmp_len = 32732 port = -1809602704 proto = 0 options = 0x707db8 ":f:cm:M:dVIhEeb:l:L:n:vKrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:" ret = -1 seed = 1532920115 rfd = 4 debug_save = 0 debug_flag = 0 dont_fork_cnt = 0 n_lst = 0x76 p = 0x7ffff51d9bce "" __FUNCTION__ = "main" quit ```
#### bt_AFTER_patch.corefile
``` #0 0x00007fe61e702165 in raise () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007fe61e7053e0 in abort () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #2 0x0000000000620cc2 in fm_free (qm=0x7fe5dc50a000, p=0x112dca4002a, file=0x7fe5d7254d6e "jsonrpc-c: jsonrpc_io.c", func=0x7fe5d725710c "free_pipe_cmd", line=551) at mem/f_malloc.c:564 f = 0x7fe5dca4a198 __FUNCTION__ = "fm_free" #3 0x00007fe5d724f9ea in free_pipe_cmd (cmd=0x7fe5dca4a1d0) at jsonrpc_io.c:551 __FUNCTION__ = "free_pipe_cmd" #4 0x00007fe5d72499d1 in cmd_pipe_cb (fd=6, event=2, arg=0x7fff85af5370) at jsonrpc_io.c:241 cmd = 0x7fe5dca4a1d0 __FUNCTION__ = "cmd_pipe_cb" params = 0x2328a40 payload = 0x23285b0 req = 0x0 json = 0x2329170 "" ns = 0x7fe5feb2b438 "201:{ "jsonrpc": "2.0", "method": "last_reg", "params": { "user": "5978002", "data": [ "1440568494", "5978002", "sip:5978002@38.106.57.69:5060;transport=TCP", "SIPp\/Linux", "tcp:38.106.57.68:5003" "... bytes = 206 g = 0x7fe5feac9a98 sent = 1 #5 0x00007fe5d6e02254 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5 No symbol table info available. #6 0x00007fe5d72475e7 in jsonrpc_io_child_process (cmd_pipe=6, _servers=0x7fe5fe70e6e8 "10.1.4.3:5013,3 10.1.4.1:5013,2 10.1.4.2:5013,1") at jsonrpc_io.c:91 __FUNCTION__ = "jsonrpc_io_child_process" pipe_ev = {ev_active_next = {tqe_next = 0x0, tqe_prev = 0x2320f10}, ev_next = {tqe_next = 0x7fe5feb2b1f8, tqe_prev = 0x2327d50}, ev_timeout_pos = {ev_next_with_common_timeout = { tqe_next = 0xffffffff, tqe_prev = 0x0}, min_heap_idx = -1}, ev_fd = 6, ev_base = 0x2327bf0, _ev = {ev_io = {ev_io_next = {tqe_next = 0x0, tqe_prev = 0x2328120}, ev_timeout = {tv_sec = 0, tv_usec = 0}}, ev_signal = {ev_signal_next = {tqe_next = 0x0, tqe_prev = 0x2328120}, ev_ncalls = 0, ev_pncalls = 0x0}}, ev_events = 18, ev_res = 2, ev_flags = 130, ev_pri = 0 '\000', ev_closure = 2 '\002', ev_timeout = {tv_sec = 140733193388081, tv_usec = 6537827312}, ev_callback = 0x7fe5d7247a9f <cmd_pipe_cb>, ev_arg = 0x7fff85af5370} #7 0x00007fe5d7250547 in child_init (rank=0) at jsonrpc_mod.c:135 pid = 0 #8 0x0000000000596a41 in init_mod_child (m=0x7fe5fe704db8, rank=0) at sr_module.c:898 __FUNCTION__ = "init_mod_child" #9 0x0000000000596779 in init_mod_child (m=0x7fe5fe705110, rank=0) at sr_module.c:895 __FUNCTION__ = "init_mod_child" #10 0x0000000000596d55 in init_child (rank=0) at sr_module.c:924 No locals. #11 0x00000000004aafd3 in main_loop () at main.c:1650 i = 24 pid = 108881 si = 0x0 si_desc = "udp receiver child=23 sock=38.106.57.68:5003\000\000\000\000~/q\000\001\000\000\000\260$Q\334\345\177\000\000 V\257\205\377\177\000\000\032\264N\000\000\000\000\000pV\257\205\377\177\000\000\270\n\260\376\345\177\000\000\310\033\236\334\345\177\000\000\260$Q\334\345\177\000\000ZI\301\026\000\000\000\000\260\210A\000\001\000\000" nrprocs = 24 __FUNCTION__ = "main_loop" #12 0x00000000004b0b5b in main (argc=13, argv=0x7fff85af58e8) at main.c:2533 cfg_stream = 0x2281010 c = -1 r = 0 tmp = 0x7fff85af77c1 "" tmp_len = 32742 port = 520714096 proto = 0 options = 0x707db8 ":f:cm:M:dVIhEeb:l:L:n:vKrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:" ret = -1 seed = 1048170556 rfd = 4 debug_save = 0 debug_flag = 0 dont_fork_cnt = 0 n_lst = 0x76 p = 0x7fff85af57ee "" __FUNCTION__ = "main" quit ```
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