Full_Name: Howard Guo Version: master-94d6581b50fa2d877cf4a1e20ca6766454094ef8 OS: openSUSE URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (195.135.221.2) The test case "test062-config-delete" occasionally runs into segfault when running with BDB backend. The chance of segfault happening is about once every 200 runs. The version of OpenLDAP is post-2.4.42 master checked out at revision 94d6581b50fa2d877cf4a1e20ca6766454094ef8, simply compiled with make. The operating system is openSUSE Tumbleweed running on kernel 4.1.6. Here is the GDB conversation with a captured core dump file: Core was generated by `/home/howard/qa_test_openldap2/tests/../servers/slapd/slapd -s0 -F ./slapd.d -h'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x000055e606fed253 in syncprov_op_abandon (op=0x7f7aa15498a0, rs=0x7f7aa15496e0) at syncprov.c:1156 1156 if ( so->s_op->o_connid == op->o_connid && (gdb) l 1151 syncprov_info_t *si = on->on_bi.bi_private; 1152 syncops *so, **sop; 1153 1154 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex ); 1155 for ( sop=&si->si_ops; (so = *sop); sop = &(*sop)->s_next ) { 1156 if ( so->s_op->o_connid == op->o_connid && 1157 so->s_op->o_msgid == op->orn_msgid ) { 1158 so->s_op->o_abandon = 1; 1159 *sop = so->s_next; 1160 break; (gdb) info locals on = <optimized out> si = 0x7f7a94104990 so = 0x7f7a94103f30 sop = 0x7f7a94104990 (gdb) print so->s_op->o_hdr Cannot access memory at address 0x6172757463757274 Please let me know how I may assist further with debugging.