Ken Giusti created DISPATCH-2123:
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Summary: qd_entity_refresh_allocator race in alloc_pool.c
Key: DISPATCH-2123
URL: https://issues.apache.org/jira/browse/DISPATCH-2123
Project: Qpid Dispatch
Issue Type: Bug
Components: Router Node
Affects Versions: 1.16.0
Reporter: Ken Giusti
Assignee: Ken Giusti
Fix For: 1.17.0
qd_entity_refresh_allocator walks all the descriptors reading their contents.
This can happen while the descriptors are being written to during normal pool
operations.
Example:
5: WARNING: ThreadSanitizer: data race (pid=566878)
65: Read of size 8 at 0x7b0c00000d10 by main thread (mutexes: write M13, write
M286, write M9):
65: #0 qd_entity_refresh_allocator
/home/kgiusti/work/dispatch/qpid-dispatch/src/alloc_pool.c:700
(libqpid-dispatch.so+0x6cdec)
65: #1 ffi_call_unix64 <null> (libffi.so.6+0x6aef)
65: #2 qdr_forward_on_message
/home/kgiusti/work/dispatch/qpid-dispatch/src/router_core/forwarder.c:336
(libqpid-dispatch.so+0xe4ff5)
65: #3 qdr_general_handler
/home/kgiusti/work/dispatch/qpid-dispatch/src/router_core/router_core.c:929
(libqpid-dispatch.so+0xf83f6)
65: #4 qd_timer_visit /home/kgiusti/work/dispatch/qpid-dispatch/src/timer.c:317
(libqpid-dispatch.so+0x135b52)
65: #5 handle /home/kgiusti/work/dispatch/qpid-dispatch/src/server.c:1006
(libqpid-dispatch.so+0x12fc8d)
65: #6 thread_run /home/kgiusti/work/dispatch/qpid-dispatch/src/server.c:1121
(libqpid-dispatch.so+0x13063a)
65: #7 qd_server_run
/home/kgiusti/work/dispatch/qpid-dispatch/src/server.c:1501
(libqpid-dispatch.so+0x1328de)
65: #8 main_process
/home/kgiusti/work/dispatch/qpid-dispatch/router/src/main.c:115
(qdrouterd+0x40271a)
65: #9 main /home/kgiusti/work/dispatch/qpid-dispatch/router/src/main.c:369
(qdrouterd+0x403557)
65:
65: Previous write of size 8 at 0x7b0c00000d10 by thread T1 (mutexes: write
M305):
65: #0 qd_dealloc
/home/kgiusti/work/dispatch/qpid-dispatch/src/alloc_pool.c:494
(libqpid-dispatch.so+0x6bacd)
65: #1 free_qdr_action_t
/home/kgiusti/work/dispatch/qpid-dispatch/src/router_core/router_core_thread.c:33
(libqpid-dispatch.so+0xf9a35)
65: #2 router_core_thread
/home/kgiusti/work/dispatch/qpid-dispatch/src/router_core/router_core_thread.c:240
(libqpid-dispatch.so+0xfb2ba)
65: #3 _thread_init
/home/kgiusti/work/dispatch/qpid-dispatch/src/posix/threading.c:172
(libqpid-dispatch.so+0xad37a)
65: #4 <null> <null> (libtsan.so.0+0x2d33f)
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