Full_Name: Semyon Chaichenets Version: 2.4.36 OS: Linux 3.2.0-51-generic #77-Ubuntu SMP Wed Jul 24 20:18:19 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (129.128.11.113) We have an issue whereby a paged-search operation causes slapd to segfault. At this point, I can only reproduce the issue on our production data - for which I cannot share coredumps. I am working on isolating the issue but would appreciate any help from openLDAP developers. The issue is triggered by the following search: ldapsearch -H ldap://ldaphost -b 'ou=people,dc=our,dc=org' -x -E pr=126/noprompt '(uid=m*)' We have ~59k entries starting matching uid=m*; the issue occurs unpredictably in the sense that it may or may not happen for filters matching other sets, but it can be reproduced reliably for any given filter/page size combination. On our setup, I could reproduce it for page-sizes 81,84,87,96,112,114,116,126. The issue is specific to back-mdb; backtrace points to dn2id.c: #0 0x00007f6d6a5ea6a1 in mdb_idscopes (op=0x7f695c110df0, isc=0x7f69692ca670) at ../../../../../servers/slapd/back-mdb/dn2id.c:738 #1 0x00007f6d6a5e399b in mdb_search (op=0x7f695c110df0, rs=0x7f69692dba00) at ../../../../../servers/slapd/back-mdb/search.c:747 [..] I would greatly appreciate any help you could give me with this problem. Best, Semyon