WARNING: ThreadSanitizer: data race 
  Write of size 1 at 0x000000000001 by thread T1:
    #0 control_recvmessage bin/named/controlconf.c:422:37
    #1 recv_data lib/isccc/ccmsg.c:110:2
    #2 isc__nm_tcp_shutdown lib/isc/netmgr/tcp.c:1161:4
    #3 shutdown_walk_cb lib/isc/netmgr/netmgr.c:1502:3
    #4 uv_walk /home/ondrej/Projects/tsan/libuv/src/uv-common.c:500:5
    #5 isc__nm_async_shutdown lib/isc/netmgr/netmgr.c:1512:2
    #6 process_queue lib/isc/netmgr/netmgr.c:660:4
    #7 async_cb lib/isc/netmgr/netmgr.c:596:2
    #8 uv__async_io /home/ondrej/Projects/tsan/libuv/src/unix/async.c:163:5
    #9 uv__io_poll /home/ondrej/Projects/tsan/libuv/src/unix/linux-core.c:461:11
    #10 uv_run /home/ondrej/Projects/tsan/libuv/src/unix/core.c:385:5
    #11 nm_thread lib/isc/netmgr/netmgr.c:500:11

  Previous read of size 1 at 0x000000000001 by thread T2:
    #0 control_command bin/named/controlconf.c:389:26
    #1 dispatch lib/isc/task.c:1152:7
    #2 run lib/isc/task.c:1344:2

  Location is heap block of size 81 at 0x000000000017 allocated by main thread:
    #0 malloc <null>
    #1 default_memalloc lib/isc/mem.c:713:8
    #2 mem_get lib/isc/mem.c:622:8
    #3 isc___mem_get lib/isc/mem.c:1044:9
    #4 isc__mem_get lib/isc/mem.c:2432:10
    #5 named_controls_create bin/named/controlconf.c:1497:31
    #6 named_server_create bin/named/server.c:10059:2
    #7 setup bin/named/main.c:1256:2
    #8 main bin/named/main.c:1523:2

  Thread T1 (running) created by main thread at:
    #0 pthread_create <null>
    #1 isc_thread_create lib/isc/pthreads/thread.c:73:8
    #2 isc_nm_start lib/isc/netmgr/netmgr.c:223:3
    #3 create_managers bin/named/main.c:909:15
    #4 setup bin/named/main.c:1223:11
    #5 main bin/named/main.c:1523:2

  Thread T2 (running) created by main thread at:
    #0 pthread_create <null>
    #1 isc_thread_create lib/isc/pthreads/thread.c:73:8
    #2 isc_taskmgr_create lib/isc/task.c:1434:3
    #3 create_managers bin/named/main.c:915:11
    #4 setup bin/named/main.c:1223:11
    #5 main bin/named/main.c:1523:2

SUMMARY: ThreadSanitizer: data race bin/named/controlconf.c:422:37 in control_recvmessage