Data race lib/dns/qp.c:563 in chunk_discount

Job #3390630 failed for 55cc0715.

WARNING: ThreadSanitizer: data race 
  Write of size 4 at 0x000000000001 by thread T1:
    #0 chunk_discount lib/dns/qp.c:563
    #1 chunk_free lib/dns/qp.c:591
    #2 destroy_guts lib/dns/qp.c:1403
    #3 qpmulti_destroy_cb lib/dns/qp.c:1441
    #4 call_rcu_thread <null>

  Previous read of size 4 at 0x000000000001 by thread T2 (mutexes: write M1):
    #0 reclaim_chunks_cb lib/dns/qp.c:663
    #1 call_rcu_thread <null>

  Location is heap block of size 168 at 0x000000000008 allocated by main thread:
    #0 malloc <null>
    #1 mallocx lib/isc/jemalloc_shim.h:65
    #2 mem_get lib/isc/mem.c:305
    #3 isc__mem_get lib/isc/mem.c:674
    #4 dns_qpmulti_create lib/dns/qp.c:1375
    #5 many_transactions tests/dns/qpmulti_test.c:370
    #6 isc__async_cb lib/isc/async.c:112
    #7 uv__async_io /usr/src/libuv-v1.44.1/src/unix/async.c:163
    #8 thread_body lib/isc/thread.c:87
    #9 isc_thread_main lib/isc/thread.c:118
    #10 isc_loopmgr_run lib/isc/loop.c:452
    #11 run_test_qpmulti tests/dns/qpmulti_test.c:388
    #12 cmocka_run_one_test_or_fixture <null>
    #13 __libc_start_call_main <null>

  Mutex M1 (0x000000000022) created at:
    #0 pthread_mutex_init <null>
    #1 dns_qpmulti_create lib/dns/qp.c:1380
    #2 many_transactions tests/dns/qpmulti_test.c:370
    #3 isc__async_cb lib/isc/async.c:112
    #4 uv__async_io /usr/src/libuv-v1.44.1/src/unix/async.c:163
    #5 thread_body lib/isc/thread.c:87
    #6 isc_thread_main lib/isc/thread.c:118
    #7 isc_loopmgr_run lib/isc/loop.c:452
    #8 run_test_qpmulti tests/dns/qpmulti_test.c:388
    #9 cmocka_run_one_test_or_fixture <null>
    #10 __libc_start_call_main <null>

  Thread T1 (running) created by main thread at:
    #0 pthread_create <null>
    #1 call_rcu_data_init <null>
    #2 run_test_qpmulti tests/dns/qpmulti_test.c:388
    #3 cmocka_run_one_test_or_fixture <null>
    #4 __libc_start_call_main <null>

  Thread T2 (running) created by main thread at:
    #0 pthread_create <null>
    #1 call_rcu_data_init <null>
    #2 run_test_qpmulti tests/dns/qpmulti_test.c:388
    #3 cmocka_run_one_test_or_fixture <null>
    #4 __libc_start_call_main <null>

SUMMARY: ThreadSanitizer: data race lib/dns/qp.c:563 in chunk_discount

WARNING: ThreadSanitizer: data race 
  Write of size 1 at 0x000000000001 by thread T1:
    #0 pthread_mutex_destroy <null>
    #1 qpmulti_destroy_cb lib/dns/qp.c:1442
    #2 call_rcu_thread <null>

  Previous atomic read of size 1 at 0x000000000001 by thread T2 (mutexes: write M1):
    #0 pthread_mutex_unlock <null>
    #1 reclaim_chunks_cb lib/dns/qp.c:668
    #2 call_rcu_thread <null>

  Location is heap block of size 168 at 0x000000000007 allocated by main thread:
    #0 malloc <null>
    #1 mallocx lib/isc/jemalloc_shim.h:65
    #2 mem_get lib/isc/mem.c:305
    #3 isc__mem_get lib/isc/mem.c:674
    #4 dns_qpmulti_create lib/dns/qp.c:1375
    #5 many_transactions tests/dns/qpmulti_test.c:370
    #6 isc__async_cb lib/isc/async.c:112
    #7 uv__async_io /usr/src/libuv-v1.44.1/src/unix/async.c:163
    #8 thread_body lib/isc/thread.c:87
    #9 isc_thread_main lib/isc/thread.c:118
    #10 isc_loopmgr_run lib/isc/loop.c:452
    #11 run_test_qpmulti tests/dns/qpmulti_test.c:388
    #12 cmocka_run_one_test_or_fixture <null>
    #13 __libc_start_call_main <null>

  Mutex M1 is already destroyed.

  Thread T1 (running) created by main thread at:
    #0 pthread_create <null>
    #1 call_rcu_data_init <null>
    #2 run_test_qpmulti tests/dns/qpmulti_test.c:388
    #3 cmocka_run_one_test_or_fixture <null>
    #4 __libc_start_call_main <null>

  Thread T2 (running) created by main thread at:
    #0 pthread_create <null>
    #1 call_rcu_data_init <null>
    #2 run_test_qpmulti tests/dns/qpmulti_test.c:388
    #3 cmocka_run_one_test_or_fixture <null>
    #4 __libc_start_call_main <null>

SUMMARY: ThreadSanitizer: data race in __interceptor_pthread_mutex_destroy

WARNING: ThreadSanitizer: data race 
  Write of size 8 at 0x000000000001 by thread T1:
    #0 free <null>
    #1 sdallocx lib/isc/jemalloc_shim.h:80
    #2 mem_put lib/isc/mem.c:327
    #3 isc__mem_putanddetach lib/isc/mem.c:560
    #4 qpmulti_destroy_cb lib/dns/qp.c:1445
    #5 call_rcu_thread <null>

  Previous read of size 4 at 0x000000000001 by thread T2 (mutexes: write M1):
    #0 reclaim_chunks_cb lib/dns/qp.c:663
    #1 call_rcu_thread <null>

  Mutex M1 is already destroyed.

  Thread T1 (running) created by main thread at:
    #0 pthread_create <null>
    #1 call_rcu_data_init <null>
    #2 run_test_qpmulti tests/dns/qpmulti_test.c:388
    #3 cmocka_run_one_test_or_fixture <null>
    #4 __libc_start_call_main <null>

  Thread T2 (running) created by main thread at:
    #0 pthread_create <null>
    #1 call_rcu_data_init <null>
    #2 run_test_qpmulti tests/dns/qpmulti_test.c:388
    #3 cmocka_run_one_test_or_fixture <null>
    #4 __libc_start_call_main <null>

SUMMARY: ThreadSanitizer: data race in __interceptor_free

Might be Duplicate of #4070 (closed).