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Bug 1408976

Summary:	dbscan-bin crashing due to a segmentation fault.
Product:	Red Hat Enterprise Linux 6	Reporter:	Têko Mihinto <tmihinto>
Component:	389-ds-base	Assignee:	Noriko Hosoi <nhosoi>
Status:	CLOSED ERRATA	QA Contact:	Viktor Ashirov <vashirov>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	6.8	CC:	gparente, nhosoi, nkinder, rmeggins, sramling, tlavigne
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	389-ds-base-1.2.11.15-88.el6	Doc Type:	Bug Fix
Doc Text:	There was a logic error in the print out code. When a truncate option (-t width) was given, the print function cut the output and replaced the last 5 bytes with " ...\0". The position to start the replace was not correct in some case, which crashed the dbscan utility. The position to start putting the 5 bytes is now correct, thus dbscan does not crash with the truncate option.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-03-21 10:24:31 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Têko Mihinto 2016-12-28 16:26:18 UTC

Description of problem:

A customer needed to get the number of entries in a given DB.
Based on this article we asked him to run dbscan:
https://github.com/richm/scripts/wiki/dbmon.sh

But dbscan is crashing in the customer environment.


Version-Release number of selected component (if applicable):

RHDS 9 - 389 1.2.11.15-84.


How reproducible:

Easily at customer site.


Steps to Reproduce:

For instance,
# dbscan -f /var/lib/dirsrv/slapd-389/db/customer/id2entry.db4  -t 200 > slapd-389_customer.txt
/usr/bin/dbscan: line 51: 28783 Segmentation fault      (core dumped) ${dir}/${COMMAND} "$@"
#


Actual results:

Command is crashing.


Expected results:

On a Red Hat test machine with RHDS 9 ( 1.2.11.15-62 ):
# dbscan -f /var/lib/dirsrv/slapd-gparenterhel64/db/userRoot/id2entry.db4 -t 200 | grep rdn:
	rdn: dc=hq,dc=gsslab,dc=rdu,dc=redhat,dc=com
	rdn: cn=Directory Administrators
	rdn: ou=Groups
	rdn: ou=People
	rdn: ou=Special Users
	rdn: cn=Accounting Managers
	rdn: cn=HR Managers
	rdn: cn=QA Managers
	rdn: cn=PD Managers
#


Additional info:

An excerpt of the backtrace:
===============================================
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-75.el6)
...

Program terminated with signal 11, Segmentation fault.
#0  0x00000035e12784fd in _int_free () from /lib64/libc.so.6

Thread 1 (Thread 0x7fa12fa57700 (LWP 25124)):
#0  0x00000035e12784fd in _int_free () from /lib64/libc.so.6
No symbol table info available.
#1  0x00000035e127b72e in _int_realloc () from /lib64/libc.so.6
No symbol table info available.
#2  0x00000035e127baf5 in realloc () from /lib64/libc.so.6
No symbol table info available.
#3  0x000000341172ad48 in __os_urealloc () from /usr/lib64/libdb-4.7.so
No symbol table info available.
#4  0x00000034116f2ce6 in __db_retcopy () from /usr/lib64/libdb-4.7.so
No symbol table info available.
#5  0x00000034116f2e28 in __db_ret () from /usr/lib64/libdb-4.7.so
No symbol table info available.
#6  0x00000034116d5eaf in __dbc_get () from /usr/lib64/libdb-4.7.so
No symbol table info available.
#7  0x00000034116de91d in __dbc_get_pp () from /usr/lib64/libdb-4.7.so
No symbol table info available.
#8  0x0000000000403014 in main (argc=<value optimized out>, argv=<value optimized out>) at ldap/servers/slapd/tools/dbscan.c:1297
===============================================

Comment 17 Noriko Hosoi 2017-01-25 21:17:20 UTC

Upstream ticket:
https://fedorahosted.org/389/ticket/49104

Comment 26 errata-xmlrpc 2017-03-21 10:24:31 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2017-0667.html