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[tor-bugs] #23139 [Core Tor/Tor]: memory leak in consdiffmgr.c
#23139: memory leak in consdiffmgr.c
------------------------------+--------------------------------
Reporter: arma | Owner:
Type: defect | Status: new
Priority: Medium | Milestone:
Component: Core Tor/Tor | Version: Tor: 0.3.1.1-alpha
Severity: Normal | Keywords:
Actual Points: | Parent ID:
Points: | Reviewer:
Sponsor: |
------------------------------+--------------------------------
Running a relay under valgrind:
{{{
==46685== 37,152 (288 direct, 36,864 indirect) bytes in 18 blocks are
definitely lost in loss record 76 of 81
==46685== at 0x4A06A2E: malloc (vg_replace_malloc.c:270)
==46685== by 0x295047: tor_malloc_ (util.c:150)
==46685== by 0x28691E: smartlist_new (container.c:34)
==46685== by 0x223173: store_multiple (consdiffmgr.c:1150)
==46685== by 0x22351C: consensus_compress_worker_replyfn
(consdiffmgr.c:1714)
==46685== by 0x29B871: replyqueue_process (workqueue.c:634)
==46685== by 0x2F28D3: event_persist_closure (in
/home/tord2/tor/src/or/tor)
==46685== by 0x2F2BE4: event_process_active_single_queue (in
/home/tord2/tor/src/or/tor)
==46685== by 0x2F325F: event_process_active (in
/home/tord2/tor/src/or/tor)
==46685== by 0x2F39C3: event_base_loop (in /home/tord2/tor/src/or/tor)
==46685== by 0x155CAC: do_main_loop (main.c:2607)
==46685== by 0x156DEC: tor_main (main.c:3756)
}}}
Sure enough, {{{consdiffmgr_ensure_space_for_files()}}} looks like it has
a
{{{
smartlist_t *objects = smartlist_new();
}}}
and {{{objects}}} is never freed in this function.
Looks like the bug arrived in commit 7a096427.
This said, that's a lot of indirect lost bytes too. Is there something
*in* the smartlist that gets leaked too? I didn't find anything obvious.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23139>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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