ThreadSanitizer: data race lib/dns/rbtdb.c:1960 in decrement_reference

• Binary: named
• Commit: 289f143d
• Tests: dsdigest

WARNING: ThreadSanitizer: data race (pid=12571)
  Read of size 8 at 0x7b200001ffc8 by thread T10 (mutexes: write M138902901664845416, read M44045782973743632):
    #0 decrement_reference /home/ondrej/Projects/bind9/lib/dns/rbtdb.c:1960 (libdns.so.1505+0x110730)
    #1 detachnode /home/ondrej/Projects/bind9/lib/dns/rbtdb.c:5202 (libdns.so.1505+0x1140b8)
    #2 dns_db_detachnode /home/ondrej/Projects/bind9/lib/dns/db.c:606 (libdns.so.1505+0x66e34)
    #3 cache_name /home/ondrej/Projects/bind9/lib/dns/resolver.c:6388 (libdns.so.1505+0x1946d7)
    #4 cache_message /home/ondrej/Projects/bind9/lib/dns/resolver.c:6416 (libdns.so.1505+0x1aefe3)
    #5 resquery_response /home/ondrej/Projects/bind9/lib/dns/resolver.c:7634 (libdns.so.1505+0x1aefe3)
    #6 dispatch /home/ondrej/Projects/bind9/lib/isc/task.c:1134 (libisc.so.1504+0x55606)
    #7 run /home/ondrej/Projects/bind9/lib/isc/task.c:1319 (libisc.so.1504+0x55606)
    #8 <null> <null> (libtsan.so.0+0x29b3d)

  Previous write of size 8 at 0x7b200001ffc8 by thread T11 (mutexes: write M167050399335913016, write M37290280453474000):
    #0 addonlevel /home/ondrej/Projects/bind9/lib/dns/rbt.c:2445 (libdns.so.1505+0xf7891)
    #1 dns_rbt_addnode /home/ondrej/Projects/bind9/lib/dns/rbt.c:1391 (libdns.so.1505+0xf7891)
    #2 dns_rbt_addnode /home/ondrej/Projects/bind9/lib/dns/rbt.c:1104 (libdns.so.1505+0xfa115)
    #3 findnodeintree /home/ondrej/Projects/bind9/lib/dns/rbtdb.c:2744 (libdns.so.1505+0x10e686)
    #4 findnode /home/ondrej/Projects/bind9/lib/dns/rbtdb.c:2789 (libdns.so.1505+0x10ec6b)
    #5 dns_db_findnode /home/ondrej/Projects/bind9/lib/dns/db.c:447 (libdns.so.1505+0x6640f)
    #6 dns_db_findnode /home/ondrej/Projects/bind9/lib/dns/db.c:435 (libdns.so.1505+0x6640f)
    #7 cache_name /home/ondrej/Projects/bind9/lib/dns/resolver.c:5996 (libdns.so.1505+0x19413f)
    #8 cache_message /home/ondrej/Projects/bind9/lib/dns/resolver.c:6416 (libdns.so.1505+0x1aefe3)
    #9 resquery_response /home/ondrej/Projects/bind9/lib/dns/resolver.c:7634 (libdns.so.1505+0x1aefe3)
    #10 dispatch /home/ondrej/Projects/bind9/lib/isc/task.c:1134 (libisc.so.1504+0x55606)
    #11 run /home/ondrej/Projects/bind9/lib/isc/task.c:1319 (libisc.so.1504+0x55606)
    #12 <null> <null> (libtsan.so.0+0x29b3d)

  Location is heap block of size 124 at 0x7b200001ff80 allocated by thread T10:
    #0 malloc <null> (libtsan.so.0+0x2b1a3)
    #1 default_memalloc /home/ondrej/Projects/bind9/lib/isc/mem.c:685 (libisc.so.1504+0x33f1e)
    #2 mem_get /home/ondrej/Projects/bind9/lib/isc/mem.c:598 (libisc.so.1504+0x34bae)
    #3 mem_allocateunlocked /home/ondrej/Projects/bind9/lib/isc/mem.c:1222 (libisc.so.1504+0x34bae)
    #4 isc___mem_allocate /home/ondrej/Projects/bind9/lib/isc/mem.c:1242 (libisc.so.1504+0x34bae)
    #5 isc__mem_allocate /home/ondrej/Projects/bind9/lib/isc/mem.c:2387 (libisc.so.1504+0x3bd94)
    #6 isc___mem_get /home/ondrej/Projects/bind9/lib/isc/mem.c:1007 (libisc.so.1504+0x3c5fa)
    #7 isc__mem_get /home/ondrej/Projects/bind9/lib/isc/mem.c:2365 (libisc.so.1504+0x3ae21)
    #8 create_node /home/ondrej/Projects/bind9/lib/dns/rbt.c:2189 (libdns.so.1505+0xf584c)
    #9 dns_rbt_addnode /home/ondrej/Projects/bind9/lib/dns/rbt.c:1146 (libdns.so.1505+0xf7ce5)
    #10 dns_rbt_addnode /home/ondrej/Projects/bind9/lib/dns/rbt.c:1104 (libdns.so.1505+0xfa115)
    #11 findnodeintree /home/ondrej/Projects/bind9/lib/dns/rbtdb.c:2744 (libdns.so.1505+0x10e686)
    #12 findnode /home/ondrej/Projects/bind9/lib/dns/rbtdb.c:2789 (libdns.so.1505+0x10ec6b)
    #13 dns_db_findnode /home/ondrej/Projects/bind9/lib/dns/db.c:447 (libdns.so.1505+0x6640f)
    #14 dns_db_findnode /home/ondrej/Projects/bind9/lib/dns/db.c:435 (libdns.so.1505+0x6640f)
    #15 cache_name /home/ondrej/Projects/bind9/lib/dns/resolver.c:5996 (libdns.so.1505+0x19413f)
    #16 cache_message /home/ondrej/Projects/bind9/lib/dns/resolver.c:6416 (libdns.so.1505+0x1aefe3)
    #17 resquery_response /home/ondrej/Projects/bind9/lib/dns/resolver.c:7634 (libdns.so.1505+0x1aefe3)
    #18 dispatch /home/ondrej/Projects/bind9/lib/isc/task.c:1134 (libisc.so.1504+0x55606)
    #19 run /home/ondrej/Projects/bind9/lib/isc/task.c:1319 (libisc.so.1504+0x55606)
    #20 <null> <null> (libtsan.so.0+0x29b3d)

  Mutex M138902901664845416 is already destroyed.

  Mutex M44045782973743632 is already destroyed.

  Mutex M167050399335913016 is already destroyed.

  Mutex M37290280453474000 is already destroyed.

  Thread T10 'isc-worker0001' (tid=12652, running) created by main thread at:
    #0 pthread_create <null> (libtsan.so.0+0x2be1b)
    #1 isc_thread_create /home/ondrej/Projects/bind9/lib/isc/pthreads/thread.c:75 (libisc.so.1504+0x7a324)
    #2 isc_taskmgr_create /home/ondrej/Projects/bind9/lib/isc/task.c:1410 (libisc.so.1504+0x583c3)
    #3 create_managers main.c:902 (named+0x1af1c)
    #4 setup main.c:1235 (named+0x1af1c)
    #5 main main.c:1513 (named+0x1af1c)

  Thread T11 'isc-worker0002' (tid=12653, running) created by main thread at:
    #0 pthread_create <null> (libtsan.so.0+0x2be1b)
    #1 isc_thread_create /home/ondrej/Projects/bind9/lib/isc/pthreads/thread.c:75 (libisc.so.1504+0x7a324)
    #2 isc_taskmgr_create /home/ondrej/Projects/bind9/lib/isc/task.c:1410 (libisc.so.1504+0x583c3)
    #3 create_managers main.c:902 (named+0x1af1c)
    #4 setup main.c:1235 (named+0x1af1c)
    #5 main main.c:1513 (named+0x1af1c)

SUMMARY: ThreadSanitizer: data race /home/ondrej/Projects/bind9/lib/dns/rbtdb.c:1960 in decrement_reference