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https://issues.apache.org/jira/browse/PROTON-540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13948239#comment-13948239
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Ken Giusti commented on PROTON-540:
-----------------------------------
Reproducer - doesn't always result in a core dump, but valgrind will flag the
issue:
$ source ./config.sh
$ valgrind --trace-children=yes
--suppressions=tests/python/proton_tests/valgrind.supp msgr-recv -a
amqp://~0.0.0.0:9999,amqp://~0.0.0.0:9998 -c 2 -t 60 -R &
$ msgr-send -a amqp://0.0.0.0:9999/0,amqp://0.0.0.0:9998/0 -c 2 -p 1 -R -t 60
> [proton-c] Messenger segfault when shutting down
> ------------------------------------------------
>
> Key: PROTON-540
> URL: https://issues.apache.org/jira/browse/PROTON-540
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Affects Versions: 0.7
> Reporter: Ken Giusti
> Assignee: Rafael H. Schloming
> Fix For: 0.7
>
>
> The 'star_topology' Messenger test are throwing the occasional seg-fault.
> Here's a valgrind backtrace:
> proton_tests.soak.MessengerTests.test_star_topology_valgrind
> ......................................................................................................
> fail
> Error during test: Traceback (most recent call last):
> File "./tests/python/proton-test", line 352, in run
> phase()
> File
> "/home/kgiusti/work/proton/0.7/qpid-proton-0.7/tests/python/proton_tests/soak.py",
> line 348, in test_star_topology_valgrind
> self._do_star_topology_test( MessengerReceiverValgrind,
> MessengerSenderValgrind )
> File
> "/home/kgiusti/work/proton/0.7/qpid-proton-0.7/tests/python/proton_tests/soak.py",
> line 280, in _do_star_topology_test
> self._do_test(iterations)
> File
> "/home/kgiusti/work/proton/0.7/qpid-proton-0.7/tests/python/proton_tests/soak.py",
> line 112, in _do_test
> R.stderr()))
> AssertionError: Command '['/usr/bin/valgrind', '--error-exitcode=1',
> '--quiet', '--trace-children=yes', '--leak-check=full',
> '--suppressions=/home/kgiusti/work/proton/0.7/qpid-proton-0.7/tests/python/proton_tests/valgrind.supp',
> 'msgr-recv', '-X', 'READY', '-a',
> 'amqp://~0.0.0.0:62305,amqp://~0.0.0.0:57030,amqp://~0.0.0.0:63714', '-c',
> '1530', '-t', '60', '-R']' failed status=1: '==16855== Invalid read of size 8
> ==16855== at 0x4C258CE: pn_compare (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C25959: pn_equals (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C25D79: pn_list_index (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C25DE8: pn_list_remove (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C445FE: pn_listener_ctx_free (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C442D1: pni_listener_finalize (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C4AC22: pn_selectable_finalize (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C25745: pn_finalize (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C256BE: pn_decref (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C257E0: pn_free (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C4B126: pn_selectable_free (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C46AED: pni_wait (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== Address 0x4ea6bb0 is 16 bytes before a block of size 56 alloc'd
> ==16855== at 0x4A06409: malloc (in
> /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
> ==16855== by 0x4C443ED: pn_listener_ctx (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4C47928: pn_messenger_subscribe (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/proton-c/libqpid-proton.so.2.0.0)
> ==16855== by 0x4021CE: main (in
> /home/kgiusti/work/proton/0.7/qpid-proton-0.7/build/tests/tools/apps/c/msgr-recv)
> ==16855==
> The problem is that the pn_listener_ctx is allocated using malloc:
> pn_listener_ctx_t *ctx = (pn_listener_ctx_t *)
> malloc(sizeof(pn_listener_ctx_t));
> ctx->messenger = messenger;
> but it is stored on a pn_list (messenger->listeners) - which assumes it is
> derived from an "object" type. When messenger tries to clean up a listener,
> the pn_list attempts to access the non-existing clazz header.
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