debdiff for the SRU on Trusty ** Description changed:
- This bug is specific to the PPC64EL architecture. More details in the - analysis. + [SRU justification] + The version of the library in the archive for Utopic and Trusty has been built prior to a change in glibc that removes an expected symbol. Rebuild of the libnss-ldap library with the current source package will render the library unusable and may cause systems to become unbootable. + + [Impact] + Without this fix, a rebuild of the libnss-ldap package will cause grave impact where usage of the libnss-ldap will segfault. Such a segfault during the boot process will cause the system to become unbootable. + + [Fix] + Backport the glibc-2.16.patch that is now merged in Vivid into Utopic and Trusty. The version of the library in Precise already uses the correct glibc symbol. + + [Test Case] + $ sudo apt-get download libnss-ldap + $ mkdir tmp + $ dpkg -x libnss-ldap_264-2.2ubuntu4_amd64.deb tmp + $ nm -D tmp/lib/x86_64-linux-gnu/libnss_ldap-2.15.so |grep lock$ + w __pthread_mutex_lock + w __pthread_mutex_unlock + #Rebuild the library + $ pull-lp-source libnss-ldap trusty + $ sbuild -A -d trusty libnss-ldap_264-2.2ubuntu4.dsc + $ rm -Rf tmp/* + $ dpkg -x libnss-ldap_264-2.2ubuntu4_amd64.deb tmp + $ nm -D tmp/lib/x86_64-linux-gnu/libnss_ldap-2.19.so | grep lock$ + U __libc_lock_lock + U __libc_lock_unlock + + Notice that the libnss-ldap version change (2.15 -> 2.19). With the + newly built version, the expected _pthread_mutex_lock|unlock is no + longer present. + + [Regression] + None expected. This is already present and in use in the upstream version of the library. + + [Original Description of the problem] + + Unlike previously thought, this bug is _NOT_ specific to the PPC64EL + architecture. More details in the analysis. Many commands that require the use of libnss-ldap will fail with Segmentation Fault. The boot procedure itself can be blocked with the following message. One potential workaround is to remove the use of ldap from the /etc/nsswitch.conf file to at least provide a bootable system. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1387594 Title: init: symbol lookup error: /lib/powerpc64le-linux- gnu/libnss_ldap.so.2: undefined symbol: __libc_lock_lock To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libnss-ldap/+bug/1387594/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
