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IDProjectCategoryView StatusLast Update
0015860CentOS-7sssdpublic2019-02-22 13:44
ReporterHenrik 
PrioritynormalSeveritytrivialReproducibilityN/A
Status newResolutionopen 
Product Version7.5.1804 
Target VersionFixed in Version 
Summary0015860: Update sssd produce segfault - error 5 in libtalloc
DescriptionHello,

I have lot of Linux CentOS VMs and got a issue with one that colleagues couldn't login to a specific VM anymore. Systemctl sssd as also /var/log messages we're spamming following error messages:

"systemctl status sssd" and /var/log/messages was spamming following error:
"[sssd[ldap_child[11108]]]: Failed to initialize credentials using keytab [MEMORY:/etc/krb5.keytab]: Preauthentication failed. Unable to create GSSAPI-encrypted LDAP connection."

- ntp force update didn't help
- Realm leave / realm join didn't help
- systemctl restart sssd was possible and came up with status "active (running)" but spammed again "GSSAPI-encrypted" errors


 
Steps To ReproduceAs steps like "ntp / sssd restarts / realm join-leave" didn't solve the issue. I performed following steps

1. yum check-update
2. yum update sssd
3. Check realm join/leave if error is gone and login would be possible again.

3.1 sssd startet to segfault with "error 5 in libtalloc.so".
"kernel: sssd_be[7187]: segfault at ffffffffffffffa1 ip 00007f616824e766 sp 00007ffe7adc38d0 error 5 in libtalloc.so.2.1.13[7f6168249000+e000]“

4. Downgrade of sssd not possible. Got yum errors that downgrade not possible. ( strange... )
5. yum reinstall libtalloc ( there was no update offered for newer revision )
5. Perform "yum update samba" and therefore all installed samba related packages
6. systemctl restart sssd + smb fixed login issues
Additional Information- Mixed sssd / samba version seem to produce libtalloc segfaults
- Should there be a warning popping up if only sssd will be updated that samba is needed as well ?


Actual installed Versions of SSSD:

rpm -qa |grep sssd
sssd-common-pac-1.16.2-13.el7_6.5.x86_64
sssd-krb5-1.16.2-13.el7_6.5.x86_64
sssd-libwbclient-1.16.2-13.el7_6.5.x86_64
sssd-krb5-common-1.16.2-13.el7_6.5.x86_64
sssd-ipa-1.16.2-13.el7_6.5.x86_64
sssd-ldap-1.16.2-13.el7_6.5.x86_64
sssd-proxy-1.16.2-13.el7_6.5.x86_64
sssd-1.16.2-13.el7_6.5.x86_64
sssd-client-1.16.2-13.el7_6.5.x86_64
sssd-common-1.16.2-13.el7_6.5.x86_64
sssd-ad-1.16.2-13.el7_6.5.x86_64
python-sssdconfig-1.16.2-13.el7_6.5.noarch


Actual installed Versions of LIBTALLOC:
rpm -qa |grep libtalloc
libtalloc-2.1.13-1.el7.x86_64


Actual installed Versions of SAMBA:

rpm -qa |grep samba
samba-common-4.8.3-4.el7.noarch
samba-libs-4.8.3-4.el7.x86_64
samba-common-libs-4.8.3-4.el7.x86_64
samba-common-tools-4.8.3-4.el7.x86_64
samba-client-libs-4.8.3-4.el7.x86_64
samba-4.8.3-4.el7.x86_64
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Issue History

Date Modified Username Field Change
2019-02-22 13:44 Henrik New Issue