Intermittent hang in dns__db_findnode() during RPZ-enabled "stress" test
named seemingly hung during an RPZ-enabled "stress" test job:
https://gitlab.isc.org/isc-private/bind9/-/jobs/4115448
The same job passed fine in the scheduled pipeline that was run last night (for the same code - only documentation differs):
https://gitlab.isc.org/isc-projects/bind9/-/jobs/4114341
Artifacts were retained for the failed job.
2024-03-12:09:46:32 ERROR: Core dump file /builds/isc-private/bind9/output/ns4/core.24295 found
Core was generated by `/builds/isc-private/bind9/.local/usr/local/sbin/named -f -c ./named.conf'.
Program terminated with signal SIGABRT, Aborted.
#0 0x00007ff920ee4107 in read_indicator_wait_until_empty (rwl=rwl@entry=0x7ff91f859658) at rwlock.c:225
225 if (read_indicator_isempty(rwl)) {
[Current thread is 1 (Thread 0x7ff91fc75600 (LWP 24295))]
#0 0x00007ff920ee4107 in read_indicator_wait_until_empty (rwl=rwl@entry=0x7ff91f859658) at rwlock.c:225
#1 0x00007ff920ee4355 in isc_rwlock_wrlock (rwl=rwl@entry=0x7ff91f859658) at rwlock.c:246
#2 0x00007ff920cdf797 in findnode (db=0x7ff91f859500, name=0x7ff91edf0400, create=<optimized out>, nodep=0x7fffc0aa4f58) at qpcache.c:2901
#3 0x00007ff920c4e924 in dns__db_findnode (db=<optimized out>, name=name@entry=0x7ff91edf0400, create=create@entry=true, nodep=nodep@entry=0x7fffc0aa4f58) at db.c:439
#4 0x00007ff920d41d31 in cache_name (fctx=fctx@entry=0x7ff8fa5eec00, name=0x7ff91edf0400, message=message@entry=0x7ff8f9f13c80, addrinfo=addrinfo@entry=0x7ff8f9f067f0, now=now@entry=1710232927) at resolver.c:5803
#5 0x00007ff920d4283d in cache_message (fctx=fctx@entry=0x7ff8fa5eec00, message=0x7ff8f9f13c80, addrinfo=0x7ff8f9f067f0, now=1710232927) at resolver.c:6223
#6 0x00007ff920d4caa2 in resquery_response (eresult=<optimized out>, region=0x7fffc0aa5470, arg=0x7ff8fa2c1000) at resolver.c:7625
#7 0x00007ff920c55e6f in udp_recv (handle=0x7ff8f9d30000, eresult=<optimized out>, region=0x7fffc0aa5470, arg=<optimized out>) at dispatch.c:619
#8 0x00007ff920ea6349 in isc___nm_readcb (arg=<optimized out>) at netmgr/netmgr.c:1856
#9 0x00007ff920ea641b in isc__nm_readcb (sock=sock@entry=0x7ff8fa58e500, uvreq=uvreq@entry=0x7ff8fa539200, eresult=eresult@entry=ISC_R_SUCCESS, async=async@entry=false) at netmgr/netmgr.c:1871
#10 0x00007ff920eb7b40 in isc__nm_udp_read_cb (handle=<optimized out>, nrecv=244, buf=0x7fffc0aa5540, addr=0x7fffc0aa5590, flags=0) at netmgr/udp.c:589
#11 0x00007ff9205bb72a in uv__udp_recvmsg (handle=0x7ff8fa58e7c0) at /usr/src/libuv-v1.48.0/src/unix/udp.c:267
#12 0x00007ff9205bb022 in uv__udp_io (loop=0x7ff91f837020, w=0x7ff8fa58e840, revents=1) at /usr/src/libuv-v1.48.0/src/unix/udp.c:142
#13 0x00007ff9205c0e70 in uv__io_poll (loop=0x7ff91f837020, timeout=612) at /usr/src/libuv-v1.48.0/src/unix/linux.c:1528
#14 0x00007ff9205a5fa4 in uv_run (loop=0x7ff91f837020, mode=UV_RUN_DEFAULT) at /usr/src/libuv-v1.48.0/src/unix/core.c:448
#15 0x00007ff920ecc52d in loop_thread (arg=arg@entry=0x7ff91f837000) at loop.c:284
#16 0x00007ff920edd775 in thread_body (wrap=0x7ff91f8d8380) at thread.c:85
#17 0x00007ff920edd7ef in isc_thread_main (func=func@entry=0x7ff920ecc4a2 <loop_thread>, arg=0x7ff91f837000) at thread.c:116
#18 0x00007ff920ecd204 in isc_loopmgr_run (loopmgr=0x7ff91f80ea80) at loop.c:456
#19 0x0000000000425250 in main (argc=<optimized out>, argv=<optimized out>) at main.c:1574