(ITS#8591) segmentation fault when loading SampleLDAP.pl

[hark@puscii.nl]

Full_Name: hark
Version: commit 9773f43b11aa8fac51407694bbdcd17830f206d5
OS: debian 9.0
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (195.169.146.71)




openldap is build with:

CFLAGS='-g' ./configure --enable-debug --enable-perl --enable-modules
--enable-passwd 
LTCFLAGS='-g'
export LTCFLAGS
make depend
make
mkdir /root/openldapdebug/
make install STRIP='' DESTDIR='/root/openldapdebug'

started with:

gdb --args /root/openldapdebug/usr/local/libexec/slapd -d1 -h "ldap:///
ldapi:///var/run/slapd/ldapi"  -F /etc/ldap/slapd.d

then when trying to do:
ldapadd -x -w $PW -D cn=admin,cn=config -H ldap:"F2F -f
/root/src/ldapcrash/slapd-add-perl.ldif


cat slapd-add-perl.ldif 
dn: olcDatabase=perl,cn=config
objectClass: olcDatabaseConfig
objectClass: olcDbPerlConfig
olcDatabase: perl
olcSuffix: dc=perl-example,dc=com
olcPerlModulePath: /root/src/perlldap/
olcPerlModule: SampleLDAP
olcPerlFilterSearchResults: FALSE
#olcPerlModuleConfig: something

dn: dc=perl-example,dc=com
objectClass: top
objectClass: dcObject
objectClass: organizationalUnit
dc: perl-example
ou: perl-example-ou

it crashes:

58a4ca92 >>> dnNormalize: <olcDatabase={2}perl>
58a4ca92 <<< dnNormalize: <olcDatabase={2}perl>
58a4ca92 >>> dnPrettyNormal: <dc=perl-example,dc=com>
58a4ca92 <<< dnPrettyNormal: <dc=perl-example,dc=com>, <dc=perl-example,dc=com>
58a4ca92 perl backend db init

Thread 3 "slapd" received signal SIGSEGV, Segmentation fault.
[Switching to LWP 7204]
0x00006a7b721f64f3 in ?? ()
(gdb) bt
#0  0x00006a7b721f64f3 in ?? ()
#1  0x00006a7b721a23af in ?? ()
#2  0x000003ad6f16fd18 in ?? ()
#3  0x000003ad6f16fd48 in ?? ()
#4  0x000003ad00000018 in ?? ()
#5  0x00006a7b2d663930 in ?? ()
#6  0x00006a7b2d6638c0 in ?? ()
#7  0xb0ac74c0fb38d600 in ?? ()
#8  0x000003ad6f16fd48 in ?? ()
#9  0x000003ad6f16fd48 in ?? ()
#10 0x0000000000000000 in ?? ()

When trying that multiple times, the backtraces are different:

Thread 3 "slapd" received signal SIGSEGV, Segmentation fault.
[Switching to LWP 7258]
0x00007cd6f62984f3 in ?? ()
(gdb) bt
#0  0x00007cd6f62984f3 in ?? ()
#1  0x00007cd6f62443af in ?? ()
#2  0x00000229299536c8 in ?? ()
#3  0x00000229299536f8 in ?? ()
#4  0x0000022900000018 in ?? ()
#5  0x00007cd6b16e4930 in ?? ()
#6  0x00007cd6b16e48c0 in ?? ()
#7  0x5c084850684a2100 in ?? ()
#8  0x00000229299536f8 in ?? ()
#9  0x00000229299536fin % ?? ()
#10 0x0000000000000000 in ?? ()

[Switching to LWP 7270]
0x00006adbabc534f3 in ?? ()
(gdb) bt
#0  0x00006adbabc534f3 in ?? ()
#1  0x00006adbabbff3af in ?? ()
#2  0x00000442aef9d2c8 in ?? ()
#3  0x00000442aef9d2f8 in ?? ()
#4  0x0000044200000018 in ?? ()
#5  0x00006adb670f3930 in ?? ()
#6  0x00006adb670f38c0 in ?? ()
#7  0x918aaeeca7964a00 in ?? ()
#8  0x00000442aef9d2f8 in ?? ()
#9  0x00000442aef9d2f8 in ?? ()
#10 0x0000000000000000 in ?? ()

perl --version

This is perl 5, version 24, subversion 1 (v5.24.1) built for
x86_64-linux-gnu-thread-multi
(with 63 registered patches, see perl -V for more detail)