https://bugs.openldap.org/show_bug.cgi?id=9626
--- Comment #1 from carlos.velasco@nimastelecom.com --- It seems ids get corrupted.
Program terminated with signal SIGSEGV, Segmentation fault. #0 0x00007f2a32a4109f in mdb_midl_append_list (idp=0x7f29f8041b13, app=0x25fa538) at midl.c:175 175 if (ids[0] + app[0] >= ids[-1]) { [Current thread is 1 (Thread 0x7f2a09ffb640 (LWP 204177))] (gdb) bt #0 0x00007f2a32a4109f in mdb_midl_append_list (idp=0x7f29f8041b13, app=0x25fa538) at midl.c:175 #1 0x00007f2a32a325bf in mdb_txn_commit (txn=0xf9bda0) at mdb.c:3485 #2 0x00007f2a32eb8904 in modsecurity::collection::backend::LMDB::storeOrUpdateFirst (this=0x1fe28b0, key=..., value=...) at collection/backend/lmdb.cc:245 #3 0x00007f2a32e97bb8 in modsecurity::collection::Collection::storeOrUpdateFirst (value=..., compartment2=..., compartment=..., key=..., this=0x1fe28b0) at ../headers/modsecurity/collection/collection.h:99 #4 modsecurity::variables::Ip_DynamicElement::storeOrUpdateFirst (value=..., var=..., t=<optimized out>) at ../src/variables/ip.h:110 #5 modsecurity::actions::SetVar::evaluate (this=0x30acfc0, rule=<optimized out>, t=<optimized out>) at actions/set_var.cc:144 #6 0x00007f2a32e641bc in modsecurity::RuleWithActions::executeActionsIndependentOfChainedRuleResult (this=this@entry=0x30c9f50, trans=trans@entry=0x7f29f8036e40, containsBlock=containsBlock@entry=0x7f2a09ff94ef, ruleMessage=...) at rule_with_actions.cc:199 #7 0x00007f2a32e6dc33 in modsecurity::RuleWithOperator::evaluate (this=<optimized out>, trans=<optimized out>, ruleMessage=...) at /usr/include/c++/11.2.0/ext/atomicity.h:109 #8 0x00007f2a32e66e59 in modsecurity::RuleWithActions::evaluate (this=0x30c9f50, transaction=0x7f29f8036e40) at /usr/include/c++/11.2.0/ext/atomicity.h:111 #9 0x00007f2a32e5cd3c in modsecurity::RulesSet::evaluate (this=<optimized out>, phase=phase@entry=3, t=t@entry=0x7f29f8036e40) at rules_set.cc:210 #10 0x00007f2a32e41793 in modsecurity::Transaction::processRequestBody (this=0x7f29f8036e40) at transaction.cc:942 #11 0x00007f2a32fa0a28 in hook_request_late () from /usr/lib64/httpd/modules/mod_security3.so #12 0x000000000045616b in ap_process_request_internal () #13 0x0000000000476ef3 in ap_process_async_request () #14 0x0000000000473150 in ap_process_http_connection () #15 0x00000000004695bf in ap_run_process_connection () #16 0x00007f2a33492831 in process_socket () from /usr/lib64/httpd/modules/mod_mpm_event.so #17 0x00007f2a33493307 in worker_thread () from /usr/lib64/httpd/modules/mod_mpm_event.so #18 0x00007f2a33703fd6 in start_thread () from /lib64/libpthread.so.0 #19 0x00007f2a336241df in clone () from /lib64/libc.so.6 (gdb) print ids $1 = (MDB_IDL) 0x7069746c756d7c20 (gdb) print ids[0] Cannot access memory at address 0x7069746c756d7c20