[Bug 1585614] Re: libc on 2016-05-25 causes Apache not to restart, libm.so.6: symbol __strtold_nan, version GLIBC_PRIVATE not defined in file libc.so.6 with link time reference

[Steve Beattie]

Blinker (and anyone else), I have eglibc/glibc packages available in the
ubuntu-security-proposed ppa https://launchpad.net/~ubuntu-security-
proposed/+archive/ubuntu/ppa that revert the problematic fix that added
references from the libm library to the new symbols, while keeping the
added __strtol*_nan symbols in libc (so as not to break people who have
already updated to the pulled packages). It'd be useful to know if this
also addresses the cron/Plesk issue as well.

I've reproduced apache failing to soft restart after updating to the
broken libc packages, and have verified that updating to the packages in
the security-proposed ppa, a currently running apache2 will soft restart
successfully when the upgrade is performed from both the restored
packages and from the broken packages. But verification from others is
appreciated as well.

(Note that the security-proposed ppa often gets packages for testing, so
it's best not to leave it enabled after testing these specific libc
packages.)

Thanks for your patience, and again, my apologies.

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https://bugs.launchpad.net/bugs/1585614

Title:
  libc on 2016-05-25 causes Apache not to restart, libm.so.6: symbol
  __strtold_nan, version GLIBC_PRIVATE not defined in file libc.so.6
  with link time reference

Status in eglibc package in Ubuntu:
  In Progress
Status in glibc package in Ubuntu:
  In Progress

Bug description:
  This morning I applied the following updates to Ubuntu 12.04
  webservers:

  The following packages are currently pending an upgrade:

   apt 0.8.16~exp12ubuntu10.27
   apt-transport-https 0.8.16~exp12ubuntu10.27
   apt-utils 0.8.16~exp12ubuntu10.27
   libapache2-mod-php5 5.3.10-1ubuntu3.23
   libapt-inst1.4 0.8.16~exp12ubuntu10.27
   libapt-pkg4.12 0.8.16~exp12ubuntu10.27
   php5-cli 5.3.10-1ubuntu3.23
   php5-common 5.3.10-1ubuntu3.23
   php5-curl 5.3.10-1ubuntu3.23
   php5-dev 5.3.10-1ubuntu3.23
   php5-gd 5.3.10-1ubuntu3.23
   php5-mysql 5.3.10-1ubuntu3.23
   php-pear 5.3.10-1ubuntu3.23

  Apache fails to restart, siting error:

  apache2: Syntax error on line 212 of /etc/apache2/apache2.conf: Syntax
  error on line 1 of /etc/apache2/mods-enabled/php5.load: Cannot load
  /usr/lib/apache2/modules/libphp5.so into server: /lib/x86_64-linux-
  gnu/libm.so.6: symbol __strtold_nan, version GLIBC_PRIVATE not defined
  in file libc.so.6 with link time reference

  Into file /var/log/apache2/error.log

  Looks like I am trying to roll back all those php packages... Which I
  see several updates marked Security Update in the changelogs, thus
  checking the "security vulnerability" box as rolling back in this case
  is such. :-(

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