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#### Description
I faced an issue with memory leak in case drop NOTIFY messages in the
"local-request" event route in `mem_copy_subs` and `build_uac_req`
analysis of mem leak:
kamcmd corex.shm_summary
<code>...
Mar 23 12:00:28 pbx kamailio[72308]: NOTICE: fm_status: fm_sums(): count=
11 size= 7520 bytes from presence: hash.c: mem_copy_subs(141)<br>
Mar 23 12:00:28 pbx kamailio[72308]: NOTICE: fm_status: fm_sums(): count=
23 size= 22536 bytes from tm: t_msgbuilder.c: build_uac_req(1618)
...</code>
a lot of dropped messages in local-request event route
<code>...
Mar 23 12:01:09 pbx kamailio[72308]: NOTICE: fm_status: fm_sums(): count=
83 size= 51256 bytes from presence: hash.c: mem_copy_subs(141)
Mar 23 12:01:09 pbx kamailio[72308]: NOTICE: fm_status: fm_sums(): count=
98 size= 116864 bytes from tm: t_msgbuilder.c: build_uac_req(1618)
...</code>
no messages, no activities
<code>...
Mar 23 12:02:34 pbx kamailio[72308]: NOTICE: fm_status: fm_sums(): count=
83 size= 51256 bytes from presence: hash.c: mem_copy_subs(141)
Mar 23 12:02:34 pbx kamailio[72308]: NOTICE: fm_status: fm_sums(): count=
96 size= 115432 bytes from tm: t_msgbuilder.c: build_uac_req(1618)
...</code>
In the code, we have a comment like "never free cbp here because if
t_uac_prepare fails, cbp is not freed and thus caller has no chance to discover
if it is freed or not", but we'll free the cbp in two cases:
1. in case of error, but we have if (ret == E_DROP) then ret = 0; (so, no error
result)
2. in case call insert_tmcb for cbp, but we don't do it for E_DROP
You can view, comment on, or merge this pull request online at:
https://github.com/kamailio/kamailio/pull/3403
-- Commit Summary --
* tm: memory leak in case dropping messages in local-request event route
-- File Changes --
M src/modules/tm/uac.c (8)
-- Patch Links --
https://github.com/kamailio/kamailio/pull/3403.patch
https://github.com/kamailio/kamailio/pull/3403.diff
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Reply to this email directly or view it on GitHub:
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