#1383 sssd_nss segfaults performing netgroup lookups without a specified domain
Closed: Fixed None Opened 8 years ago by sgallagh.

https://bugzilla.redhat.com/show_bug.cgi?id=833789 (Fedora)

Description of problem:


Version-Release number of selected component (if applicable):
sssd-1.8.93-0.20120618T1837Zgitbb79e75.fc17.x86_64

How reproducible:
Always

Steps to Reproduce: (Not sure if this is related, but the case where crash was
detected is)

1. # ipa sudorule-show sudorule1 --all --raw
  dn: ipauniqueid=8d023938-bac0-11e1-b429-525400951069,cn=sudorules,cn=sudo,dc=
testrelm,dc=com
  cn: sudorule1
  ipaenabledflag: TRUE
  memberhost: cn=hostgrp1,cn=hostgroups,cn=accounts,dc=testrelm,dc=com
  memberuser: uid=user1,cn=users,cn=accounts,dc=testrelm,dc=com
  ipauniqueid: 8d023938-bac0-11e1-b429-525400951069
  objectclass: ipaassociation
  objectclass: ipasudorule

2. # ldapsearch -LLL -Y GSSAPI -b ou=SUDOers,dc=testrelm,dc=com
SASL/GSSAPI authentication started
SASL username: admin@TESTRELM.COM
SASL SSF: 56
SASL data security layer installed.
dn: ou=sudoers,dc=testrelm,dc=com
objectClass: extensibleObject
ou: sudoers

dn: cn=sudorule1,ou=sudoers,dc=testrelm,dc=com
objectClass: sudoRole
sudoUser: user1
sudoHost: +hostgrp1
cn: sudorule1

3. [root@dhcp201-207 ~]#  ssh -o StrictHostKeyChecking=no -l user1
dhcp201-207.testrelm.com
user1@dhcp201-207.testrelm.com's password:
Last login: Wed Jun 20 07:06:09 2012 from dhcp201-207.testrelm.com
-sh-4.2$

4. -sh-4.2$ sudo -l


Actual results:
/var/log/messages:
Jun 20 07:06:17 dhcp201-207 kernel: [1039881.361685] sssd_nss[20374]: segfault
at 20 ip 0000003af5e89d8d sp 00007fff523572d8 e
rror 4 in libc-2.15.so[3af5e00000+1ac000]
Jun 20 07:06:17 dhcp201-207 abrtd: Directory 'ccpp-2012-06-20-07:06:17-20374'
creation detected
Jun 20 07:06:17 dhcp201-207 abrt[20454]: Saved core dump of pid 20374
(/usr/libexec/sssd/sssd_nss) to /var/spool/abrt/ccpp-201
2-06-20-07:06:17-20374 (1142784 bytes)
Jun 20 07:06:17 dhcp201-207 sssd[nss]: Starting up



Expected results: No crash detected.


Additional info:

relevant sssd.conf:
--8<--
[domain/testrelm.com]

cache_credentials = True
krb5_store_password_if_offline = True
ipa_domain = testrelm.com
id_provider = ipa
auth_provider = ipa
access_provider = ipa
ipa_hostname = dhcp201-207.testrelm.com
chpass_provider = ipa
ipa_server = dhcp201-207.testrelm.com
ldap_tls_cacert = /etc/ipa/ca.crt
[sssd]
services = nss, pam, ssh
config_file_version = 2

domains = testrelm.com
-->8--

sudo debug:
-sh-4.2$ sudo -l
LDAP Config Summary
===================
uri              ldap://dhcp201-207.testrelm.com
ldap_version     3
sudoers_base     ou=SUDOers,dc=testrelm,dc=com
binddn           uid=sudo,cn=sysaccounts,cn=etc,dc=testrelm,dc=com
bindpw           bind123
bind_timelimit   5
timelimit        15
ssl              no
tls_checkpeer    (yes)
tls_cacertfile   /etc/ipa/ca.crt
tls_cacertdir    /etc/ipa
===================
sudo: ldap_initialize(ld, ldap://dhcp201-207.testrelm.com)
sudo: ldap_set_option: debug -> 0
sudo: ldap_set_option: ldap_version -> 3
sudo: ldap_set_option: tls_checkpeer -> 1
sudo: ldap_set_option: tls_cacertfile -> /etc/ipa/ca.crt
sudo: ldap_set_option: tls_cacert -> /etc/ipa/ca.crt
sudo: ldap_set_option: tls_cacertdir -> /etc/ipa
sudo: ldap_set_option: timelimit -> 15
sudo: ldap_set_option(LDAP_OPT_NETWORK_TIMEOUT, 5)
sudo: ldap_sasl_bind_s() ok
sudo: Looking for cn=defaults: cn=defaults
sudo: no default options found in ou=SUDOers,dc=testrelm,dc=com
sudo: ldap search '(|(sudoUser=user1)(sudoUser=%user1)(sudoUser=ALL))'
sudo: searching from base 'ou=SUDOers,dc=testrelm,dc=com'
sudo: adding search result
sudo: ldap sudoHost '+hostgrp1' ... not
sudo: result now has 0 entries
sudo: ldap search '(sudoUser=+*)'
sudo: searching from base 'ou=SUDOers,dc=testrelm,dc=com'
sudo: adding search result
sudo: result now has 0 entries
sudo: sorting remaining 0 entries
sudo: perform search for pwflag 52
sudo: done with LDAP searches
sudo: user_matches=1
sudo: host_matches=0
sudo: sudo_ldap_lookup(52)=0x42
[sudo] password for user1:

Fields changed

blockedby: =>
blocking: =>
coverity: =>
feature_milestone: =>
keywords: => Regression
milestone: NEEDS_TRIAGE => SSSD 1.9.0 beta 3
owner: somebody => sgallagh
patch: 0 => 1
priority: major => blocker
status: new => assigned
tests: => 0
testsupdated: => 0
upgrade: => 0

Don't think this is related to sudo since the same crash is detected while doing a "getent netgroup hostgrp1"

You are correct, Shanks. It was due to the recent patches to the name/domain parsing. A patch is on the sssd-devel list now.

summary: sssd_nss segfaults when sudo operation is performed. => sssd_nss segfaults performing netgroup lookups without a specified domain

Fixed by 4b0b0bc (master)

resolution: => fixed
status: assigned => closed

Metadata Update from @sgallagh:
- Issue assigned to sgallagh
- Issue set to the milestone: SSSD 1.9.0 beta 3

3 years ago

SSSD is moving from Pagure to Github. This means that new issues and pull requests
will be accepted only in SSSD's github repository.

This issue has been cloned to Github and is available here:
- https://github.com/SSSD/sssd/issues/2425

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Thank you for understanding. We apologize for all inconvenience.

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