Code commit much memory and can't free it about nagios-alerta HOT 2 CLOSED

root@ubuntu-xenial:~/nagios-alerta# valgrind --tool=memcheck --leak-check=yes /usr/local/nagios/bin/nagios /usr/local/nagios/etc/nagios.cfg
==7475== Memcheck, a memory error detector
==7475== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==7475== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info
==7475== Command: /usr/local/nagios/bin/nagios /usr/local/nagios/etc/nagios.cfg
==7475==

Nagios Core 4.1.1
Copyright (c) 2009-present Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 08-19-2015
License: GPL

Website: https://www.nagios.org
Nagios 4.1.1 starting... (PID=7475)
Local time is Tue Aug 22 08:01:24 UTC 2017
nerd: Channel hostchecks registered successfully
nerd: Channel servicechecks registered successfully
nerd: Channel opathchecks registered successfully
nerd: Fully initialized and ready to rock!
wproc: Successfully registered manager as @wproc with query handler
wproc: Registry request: name=Core Worker 7476;pid=7476
wproc: Registry request: name=Core Worker 7477;pid=7477
wproc: Registry request: name=Core Worker 7479;pid=7479
wproc: Registry request: name=Core Worker 7478;pid=7478
Event broker module '/usr/lib/nagios/alerta-neb.o' initialized successfully.
Successfully launched command file worker with pid 7480
==7475== Process terminating with default action of signal 2 (SIGINT)
==7475==    at 0x544E9D3: ??? (syscall-template.S:84)
==7475==    by 0x472963: iobroker_poll (in /usr/local/nagios/bin/nagios)
==7475==    by 0x4317AF: event_execution_loop (in /usr/local/nagios/bin/nagios)
==7475==    by 0x413A31: main (in /usr/local/nagios/bin/nagios)
==7475==
==7475== HEAP SUMMARY:
==7475==     in use at exit: 5,288,165 bytes in 4,726 blocks
==7475==   total heap usage: 15,174 allocs, 10,448 frees, 6,304,641 bytes allocated
==7475==
==7475== 47 (16 direct, 31 indirect) bytes in 1 blocks are definitely lost in loss record 856 of 1,033
==7475==    at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7475==    by 0x69974B9: ??? (in /usr/lib/x86_64-linux-gnu/libcurl.so.4.4.0)
==7475==    by 0x6997527: curl_slist_append (in /usr/lib/x86_64-linux-gnu/libcurl.so.4.4.0)
==7475==    by 0x6752A11: send_to_alerta (alerta-neb.c:235)
==7475==    by 0x6752D7D: check_handler (alerta-neb.c:451)
==7475==    by 0x4169FE: neb_make_callbacks (in /usr/local/nagios/bin/nagios)
==7475==    by 0x414E93: broker_service_check (in /usr/local/nagios/bin/nagios)
==7475==    by 0x42018A: handle_async_service_check_result (in /usr/local/nagios/bin/nagios)
==7475==    by 0x41A729: ??? (in /usr/local/nagios/bin/nagios)
==7475==    by 0x4729B0: iobroker_poll (in /usr/local/nagios/bin/nagios)
==7475==    by 0x4317AF: event_execution_loop (in /usr/local/nagios/bin/nagios)
==7475==    by 0x413A31: main (in /usr/local/nagios/bin/nagios)
==7475==
==7475== 47 (16 direct, 31 indirect) bytes in 1 blocks are definitely lost in loss record 857 of 1,033
==7475==    at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7475==    by 0x69974B9: ??? (in /usr/lib/x86_64-linux-gnu/libcurl.so.4.4.0)
==7475==    by 0x6997527: curl_slist_append (in /usr/lib/x86_64-linux-gnu/libcurl.so.4.4.0)
==7475==    by 0x6752A11: send_to_alerta (alerta-neb.c:235)
==7475==    by 0x675377E: check_handler (alerta-neb.c:512)
==7475==    by 0x4169FE: neb_make_callbacks (in /usr/local/nagios/bin/nagios)
==7475==    by 0x414E93: broker_service_check (in /usr/local/nagios/bin/nagios)
==7475==    by 0x42018A: handle_async_service_check_result (in /usr/local/nagios/bin/nagios)
==7475==    by 0x41A729: ??? (in /usr/local/nagios/bin/nagios)
==7475==    by 0x4729B0: iobroker_poll (in /usr/local/nagios/bin/nagios)
==7475==    by 0x4317AF: event_execution_loop (in /usr/local/nagios/bin/nagios)
==7475==    by 0x413A31: main (in /usr/local/nagios/bin/nagios)
==7475==
==7475== 75 bytes in 1 blocks are definitely lost in loss record 883 of 1,033
==7475==    at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7475==    by 0x67528BE: replace_char (alerta-neb.c:169)
==7475==    by 0x67529F8: send_to_alerta (alerta-neb.c:230)
==7475==    by 0x6752D7D: check_handler (alerta-neb.c:451)
==7475==    by 0x4169FE: neb_make_callbacks (in /usr/local/nagios/bin/nagios)
==7475==    by 0x414E93: broker_service_check (in /usr/local/nagios/bin/nagios)
==7475==    by 0x42018A: handle_async_service_check_result (in /usr/local/nagios/bin/nagios)
==7475==    by 0x41A729: ??? (in /usr/local/nagios/bin/nagios)
==7475==    by 0x4729B0: iobroker_poll (in /usr/local/nagios/bin/nagios)
==7475==    by 0x4317AF: event_execution_loop (in /usr/local/nagios/bin/nagios)
==7475==    by 0x413A31: main (in /usr/local/nagios/bin/nagios)
==7475==
==7475== 340 bytes in 1 blocks are definitely lost in loss record 948 of 1,033
==7475==    at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7475==    by 0x67528BE: replace_char (alerta-neb.c:169)
==7475==    by 0x67529F8: send_to_alerta (alerta-neb.c:230)
==7475==    by 0x675377E: check_handler (alerta-neb.c:512)
==7475==    by 0x4169FE: neb_make_callbacks (in /usr/local/nagios/bin/nagios)
==7475==    by 0x414E93: broker_service_check (in /usr/local/nagios/bin/nagios)
==7475==    by 0x42018A: handle_async_service_check_result (in /usr/local/nagios/bin/nagios)
==7475==    by 0x41A729: ??? (in /usr/local/nagios/bin/nagios)
==7475==    by 0x4729B0: iobroker_poll (in /usr/local/nagios/bin/nagios)
==7475==    by 0x4317AF: event_execution_loop (in /usr/local/nagios/bin/nagios)
==7475==    by 0x413A31: main (in /usr/local/nagios/bin/nagios)
==7475==
==7475== LEAK SUMMARY:
==7475==    definitely lost: 447 bytes in 4 blocks
==7475==    indirectly lost: 62 bytes in 2 blocks
==7475==      possibly lost: 0 bytes in 0 blocks
==7475==    still reachable: 5,287,656 bytes in 4,720 blocks
==7475==         suppressed: 0 bytes in 0 blocks
==7475== Reachable blocks (those to which a pointer was found) are not shown.
==7475== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==7475==
==7475== For counts of detected and suppressed errors, rerun with: -v
==7475== ERROR SUMMARY: 4 errors from 4 contexts (suppressed: 0 from 0)
==7475== could not unlink /tmp/vgdb-pipe-from-vgdb-to-7475-by-root-on-???
==7475== could not unlink /tmp/vgdb-pipe-to-vgdb-from-7475-by-root-on-???
==7475== could not unlink /tmp/vgdb-pipe-shared-mem-vgdb-7475-by-root-on-???

root@ubuntu-xenial:/etc/init.d# ==7480==
==7480== HEAP SUMMARY:
==7480==     in use at exit: 4,595,902 bytes in 3,459 blocks
==7480==   total heap usage: 14,734 allocs, 11,275 frees, 5,456,600 bytes allocated
==7480==
==7480== LEAK SUMMARY:
==7480==    definitely lost: 0 bytes in 0 blocks
==7480==    indirectly lost: 0 bytes in 0 blocks
==7480==      possibly lost: 0 bytes in 0 blocks
==7480==    still reachable: 4,595,902 bytes in 3,459 blocks
==7480==         suppressed: 0 bytes in 0 blocks
==7480== Reachable blocks (those to which a pointer was found) are not shown.
==7480== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==7480==
==7480== For counts of detected and suppressed errors, rerun with: -v
==7480== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
``