The following test crashed in the JDK17 CI with UT enabled:

vmTestbase/gc/gctests/LargeObjects/large005/TestDescription.java

Here's a snippet from the log file:

0: Testing non-null after GC force for: nsk.share.gc.newclass.public_long_schild
0: Unloading class: nsk.share.gc.newclass.public_long_schild
0: Result of uloading class nsk.share.gc.newclass.public_long_schild: true
0: Loading class: nsk.share.gc.newclass.public_Object_schild
0: Class loaded: nsk.share.gc.newclass.public_Object_schild
0: Instance of the class: nsk.share.gc.newclass.public_Object_schild@6c95e46a
Added field objC .... 3
Added field objC .... 2
Added field objC .... 1
Added field objP .... 1
Added field objP .... 2
Added field objC .... 1
Added field objP .... 1
Added field objP .... 3
Added field objC .... 2
Added field objC .... 1
Added field objP .... 1
Added field objP .... 2
Added field objC .... 1
Added field objP .... 1
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f63dc7fd418, pid=15290, tid=16042
#
# JRE version: Java(TM) SE Runtime Environment (17.0+25) (build 17-ea+25-LTS-2251)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (17-ea+25-LTS-2251, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x6a0418] void OopOopIterateBoundedDispatch<G1CMOopClosure>::Table::oop_oop_iterate_bounded<ObjArrayKlass, narrowOop>(G1CMOopClosure*, oopDesc*, Klass*, MemRegion)+0x488
#
# Core dump will be written. Default location: Core dumps may be processed with "/opt/core.sh %p" (or dumping to /opt/mach5/mesos/work_dir/slaves/28992c6d-c35d-42fa-8099-898223bf183b-S25553/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/20ce6d52-7f0a-4bf7-8017-754b94d6b1d0/runs/bcb6d674-4464-4b62-8041-85f8be723397/testoutput/test-support/jtreg_open_test_hotspot_jtreg_vmTestbase_vm_gc_misc/scratch/3/core.15290)
#
# An error report file with more information is saved as:
# /opt/mach5/mesos/work_dir/slaves/28992c6d-c35d-42fa-8099-898223bf183b-S25553/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/20ce6d52-7f0a-4bf7-8017-754b94d6b1d0/runs/bcb6d674-4464-4b62-8041-85f8be723397/testoutput/test-support/jtreg_open_test_hotspot_jtreg_vmTestbase_vm_gc_misc/scratch/3/hs_err_pid15290.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#
----------System.err:(0/0)----------
----------rerun:(35/7615)*----------


Here's the crashing thread's stack:

--------------- T H R E A D ---------------

Current thread (0x00007f63ac000a80): ConcurrentGCThread "G1 Conc#1" [stack: 0x00007f638a7db000,0x00007f638a8db000] [id=16042]

Stack: [0x00007f638a7db000,0x00007f638a8db000], sp=0x00007f638a8d9bc0, free space=1018k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x6a0418] void OopOopIterateBoundedDispatch<G1CMOopClosure>::Table::oop_oop_iterate_bounded<ObjArrayKlass, narrowOop>(G1CMOopClosure*, oopDesc*, Klass*, MemRegion)+0x488
V [libjvm.so+0x6c8b2f] G1CMObjArrayProcessor::process_slice(HeapWordImpl**)+0xef
V [libjvm.so+0x6c6bac] void G1CMTask::process_grey_task_entry<true>(G1TaskQueueEntry)+0x2c
V [libjvm.so+0x6bf907] G1CMTask::drain_local_queue(bool) [clone .part.0] [clone .constprop.1]+0x87
V [libjvm.so+0x6c3110] G1CMTask::do_marking_step(double, bool, bool)+0x7e0
V [libjvm.so+0x6c812d] G1CMConcurrentMarkingTask::work(unsigned int)+0xdd
V [libjvm.so+0xe2d51f] GangWorker::loop()+0x5f
V [libjvm.so+0xe2d57f]
V [libjvm.so+0xd8117e] Thread::call_run()+0xde
V [libjvm.so+0xbd7a4f] thread_native_entry(Thread*)+0xdf


siginfo: si_signo: 11 (SIGSEGV), si_code: 1 (SEGV_MAPERR), si_addr: 0x0000000000000100