<p></p>
<p><strong>Updates:</strong></p>
<p>A few days ago we've got the same segfault on production server, but in this case it happened without shut down. I think there is a race when calling process_rpc_req function and it does not relate to server cooldown.</p>
<p><strong>Core dump:</strong></p>
<p>GNU gdb (Debian 7.12-6) 7.12.0.20161007-git<br>
Copyright (C) 2016 Free Software Foundation, Inc.<br>
License GPLv3+: GNU GPL version 3 or later <a href="http://gnu.org/licenses/gpl.html" rel="nofollow">http://gnu.org/licenses/gpl.html</a><br>
This is free software: you are free to change and redistribute it.<br>
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"<br>
and "show warranty" for details.<br>
This GDB was configured as "x86_64-linux-gnu".<br>
Type "show configuration" for configuration details.<br>
For bug reporting instructions, please see:<br>
<a href="http://www.gnu.org/software/gdb/bugs/" rel="nofollow">http://www.gnu.org/software/gdb/bugs/</a>.<br>
Find the GDB manual and other documentation resources online at:<br>
<a href="http://www.gnu.org/software/gdb/documentation/" rel="nofollow">http://www.gnu.org/software/gdb/documentation/</a>.<br>
For help, type "help".<br>
Type "apropos word" to search for commands related to "word"...<br>
Reading symbols from /var/lib/ums/sbin/kamailio...done.<br>
[New LWP 6226]<br>
[Thread debugging using libthread_db enabled]<br>
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".<br>
Core was generated by `/var/lib/ums/sbin/kamailio -m 2048 -M 12 -P /var/run/kamailio/kamailio.pid -f /'.<br>
Program terminated with signal SIGSEGV, Segmentation fault.<br>
#0  __strcmp_sse2_unaligned ()<br>
at ../sysdeps/x86_64/multiarch/strcmp-sse2-unaligned.S:32<br>
#0  __strcmp_sse2_unaligned () at ../sysdeps/x86_64/multiarch/strcmp-sse2-unaligned.S:32<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="31891578" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/1" data-hovercard-type="issue" data-hovercard-url="/kamailio/kamailio/issues/1/hovercard" href="https://github.com/kamailio/kamailio/issues/1">#1</a>  0x00007f327f55c2f5 in rpc_mod_print (rpc=0x7f327ee71540 <binrpc_callbacks>, ctx=0x7ffe1418a9b8, mname=0x1dca0c8 "tls", stats=0x1de5310, flag=2) at mod_stats.c:117<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="41491271" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/2" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/2/hovercard" href="https://github.com/kamailio/kamailio/pull/2">#2</a>  0x00007f327f55c0eb in rpc_mod_print_one (rpc=0x7f327ee71540 <binrpc_callbacks>, ctx=0x7ffe1418a9b8, mname=0x1dca0c8 "tls", pkg_stats=0x1de39d0, shm_stats=0x1de5310, flag=2) at mod_stats.c:159<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="48744343" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/3" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/3/hovercard" href="https://github.com/kamailio/kamailio/pull/3">#3</a>  0x00007f327f55bee1 in rpc_mod_mem_stats_mode (rpc=0x7f327ee71540 <binrpc_callbacks>, ctx=0x7ffe1418a9b8, fmode=0) at mod_stats.c:239<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="49856885" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/4" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/4/hovercard" href="https://github.com/kamailio/kamailio/pull/4">#4</a>  0x00007f327f55b84f in rpc_mod_mem_stats (rpc=0x7f327ee71540 <binrpc_callbacks>, ctx=0x7ffe1418a9b8) at mod_stats.c:251<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="51480460" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/5" data-hovercard-type="issue" data-hovercard-url="/kamailio/kamailio/issues/5/hovercard" href="https://github.com/kamailio/kamailio/issues/5">#5</a>  0x00007f327ec40c80 in process_rpc_req (buf=0x1dca0b4 "\241\003\026F\270\067\r\221\nmod.stats", size=29, bytes_needed=0x7ffe1418ae00, sh=0x7ffe1418ad70, saved_state=0x1dda0b8) at binrpc_run.c:678<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="51489870" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/6" data-hovercard-type="issue" data-hovercard-url="/kamailio/kamailio/issues/6/hovercard" href="https://github.com/kamailio/kamailio/issues/6">#6</a>  0x00007f327ec2e72f in handle_stream_read (s_c=0x1dca080, idx=-1) at io_listener.c:511<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="51492477" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/7" data-hovercard-type="issue" data-hovercard-url="/kamailio/kamailio/issues/7/hovercard" href="https://github.com/kamailio/kamailio/issues/7">#7</a>  0x00007f327ec2a121 in handle_io (fm=0x7f3302c66cc0, events=1, idx=-1) at io_listener.c:706<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="51499233" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/8" data-hovercard-type="issue" data-hovercard-url="/kamailio/kamailio/issues/8/hovercard" href="https://github.com/kamailio/kamailio/issues/8">#8</a>  0x00007f327ec2893a in io_wait_loop_epoll (h=0x7f327ee71348 <io_h>, t=10, repeat=0) at ./../../core/io_wait.h:1062<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="51703057" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/9" data-hovercard-type="issue" data-hovercard-url="/kamailio/kamailio/issues/9/hovercard" href="https://github.com/kamailio/kamailio/issues/9">#9</a>  0x00007f327ec1c62c in io_listen_loop (fd_no=2, cs_lst=0x1cde940) at io_listener.c:281<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="52436308" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/10" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/10/hovercard" href="https://github.com/kamailio/kamailio/pull/10">#10</a> 0x00007f327ec5272c in mod_child (rank=0) at ctl.c:338<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="52569646" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/11" data-hovercard-type="issue" data-hovercard-url="/kamailio/kamailio/issues/11/hovercard" href="https://github.com/kamailio/kamailio/issues/11">#11</a> 0x0000000000638c14 in init_mod_child (m=0x7f3302ae54b0, rank=0) at core/sr_module.c:780<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="52744476" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/12" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/12/hovercard" href="https://github.com/kamailio/kamailio/pull/12">#12</a> 0x000000000063862d in init_mod_child (m=0x7f3302ae5b78, rank=0) at core/sr_module.c:776<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="52784350" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/13" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/13/hovercard" href="https://github.com/kamailio/kamailio/pull/13">#13</a> 0x000000000063862d in init_mod_child (m=0x7f3302ae6018, rank=0) at core/sr_module.c:776<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="52819753" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/14" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/14/hovercard" href="https://github.com/kamailio/kamailio/pull/14">#14</a> 0x000000000063862d in init_mod_child (m=0x7f3302ae6528, rank=0) at core/sr_module.c:776<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="52852064" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/15" data-hovercard-type="issue" data-hovercard-url="/kamailio/kamailio/issues/15/hovercard" href="https://github.com/kamailio/kamailio/issues/15">#15</a> 0x000000000063862d in init_mod_child (m=0x7f3302ae69c8, rank=0) at core/sr_module.c:776<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="53297477" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/16" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/16/hovercard" href="https://github.com/kamailio/kamailio/pull/16">#16</a> 0x000000000063862d in init_mod_child (m=0x7f3302ae7140, rank=0) at core/sr_module.c:776<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="53387906" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/17" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/17/hovercard" href="https://github.com/kamailio/kamailio/pull/17">#17</a> 0x000000000063862d in init_mod_child (m=0x7f3302ae77b0, rank=0) at core/sr_module.c:776<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="53397137" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/18" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/18/hovercard" href="https://github.com/kamailio/kamailio/pull/18">#18</a> 0x000000000063862d in init_mod_child (m=0x7f3302ae7c38, rank=0) at core/sr_module.c:776<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="53511603" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/19" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/19/hovercard" href="https://github.com/kamailio/kamailio/pull/19">#19</a> 0x00000000006385b2 in init_child (rank=0) at core/sr_module.c:825<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="53562369" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/20" data-hovercard-type="pull_request" data-hovercard-url="/kamailio/kamailio/pull/20/hovercard" href="https://github.com/kamailio/kamailio/pull/20">#20</a> 0x000000000043140c in main_loop () at main.c:1753<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="53562546" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/21" data-hovercard-type="issue" data-hovercard-url="/kamailio/kamailio/issues/21/hovercard" href="https://github.com/kamailio/kamailio/issues/21">#21</a> 0x000000000043df6f in main (argc=9, argv=0x7ffe1418f138) at main.c:2802</p>
<p><strong>Logs:</strong></p>
<p>2020-08-18T12:36:03.755718-07:00 hpbx031-1.va /var/lib/ums/sbin/kamailio[6204]: INFO: <script>: sip_call_id=<a href="mailto:9bf05e23-bdab-4c7e-93fd-975f1d27d3a9@hpbx031-1.va">9bf05e23-bdab-4c7e-93fd-975f1d27d3a9@hpbx031-1.va</a>; Received ACK in a dialog<br>
2020-08-18T12:36:03.755756-07:00 hpbx031-1.va /var/lib/ums/sbin/kamailio[6204]: INFO: <script>: sip_call_id=<a href="mailto:9bf05e23-bdab-4c7e-93fd-975f1d27d3a9@hpbx031-1.va">9bf05e23-bdab-4c7e-93fd-975f1d27d3a9@hpbx031-1.va</a>; Relaying ACK from b2bua to sip:54171324@127.0.0.1:5060<br>
2020-08-18T12:36:03.757855-07:00 hpbx031-1.va /var/lib/ums/sbin/kamailio[6197]: INFO: <script>: [75229096,R,0_1478685494]: Received, method: REGISTER, R-URI: sip:hpbx031.telecomsvc.com:5060, ct: sip:75229096@192.168.10.116:5100, cseq: 14166, s-ip: 74.89.64.126, s-port: 5100<br>
2020-08-18T12:37:29.073600-07:00 hpbx031-1.va /var/lib/ums/sbin/kamailio[6193]: INFO:  [core/sctp_core.c:53]: sctp_core_destroy(): SCTP API not initialized<br>
2020-08-18T12:37:39.583593-07:00 hpbx031-1.va kamailio: INFO:  [core/sctp_core.c:75]: sctp_core_check_support(): SCTP API not enabled - if you want to use it, load sctp module<br>
2020-08-18T12:37:39.780830-07:00 hpbx031-1.va kamailio: INFO:  [core/tcp_main.c:5043]: init_tcp(): using epoll_lt as the io watch method (auto detected)<br>
2020-08-18T12:37:39.781363-07:00 hpbx031-1.va kamailio[23718]: loading modules under config path: /var/lib/ums/lib64/kamailio/modules/<br>
2020-08-18T12:37:39.781546-07:00 hpbx031-1.va kamailio[23718]: Listening on</p>

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