Dear Maintainer,

dhcpd doesn't handle LDAP sizelimits correctly.

If LDAP-server returns error code 4 (LDAP_SIZELIMIT_EXCEEDED) then dhcpd seems to hang until a
segmentation fault occurs.

When using LDAPS instead of LDAP then dhcpd prints:
-- snip --
Internet Systems Consortium DHCP Server 4.4.1
Copyright 2004-2018 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Cannot set LDAP TLS crl check option: Can't contact LDAP server
LDAPS session successfully enabled to zitisrv01.ziti.uni-heidelberg.de:636
Cannot set LDAP TLS crl check option: Can't contact LDAP server
LDAPS session successfully enabled to zitisrv01.ziti.uni-heidelberg.de:636
Cannot set LDAP TLS crl check option: Can't contact LDAP server
LDAPS session successfully enabled to zitisrv01.ziti.uni-heidelberg.de:636
-- continues until segmentation fault --

relevant slapd log lines:
-- snip --
slapd[1753072]: conn=1618 fd=27 ACCEPT from IP=127.0.0.1:44080 (IP=127.0.0.1:389)
slapd[1753072]: conn=1618 op=0 BIND dn="cn=dhcp,ou=dsa,dc=example,dc=com" method=128
slapd[1753072]: conn=1618 op=0 BIND dn="cn=dhcp,ou=dsa,dc=example,dc=com" mech=SIMPLE ssf=0
slapd[1753072]: conn=1618 op=0 RESULT tag=97 err=0 text=
slapd[1753072]: conn=1618 op=1 SRCH base="cn=dhcp-group,cn=dhcp-config,dc=example,dc=com" scope=1
deref=0 filter="(!(|(|(objectClass=dhcpTSigKey)(objectClass=dhcpClass))(objectClass=dhcpFailOverPeer)))"
slapd[1753072]: conn=1618 op=1 SEARCH RESULT tag=101 err=4 nentries=50 text=
slapd[1753072]: conn=1618 op=2 UNBIND
-- snip --

in slapd config:
  sizelimit size.soft=50 size.hard=1000

The DHCP group "dhcp-group" requested in the failing LDAP search contains 100 host entries.

When changing the slapd sizelimit to 100 or larger, then dhcpd works.

Thanks!
Christian

Dear submitter,

as the package isc-dhcp has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1143544

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)