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From "Ken Giusti (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PROTON-540) [proton-c] Messenger segfault when shutting down
Date Wed, 26 Mar 2014 17:41:17 GMT
Ken Giusti created PROTON-540:
---------------------------------

             Summary: [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
             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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