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Bug#759530: libc-bin: ldconfig breaks a system



Package: libc-bin
Version: 2.19-9
Severity: grave
File: /sbin/ldconfig

Dear Maintainer,

I had an upgrade of libc6 and libc-bin packages up to the version
2.19-9 from 2.19-4 while executing `apt-get upgrade'. In the begin it
seemed as a usual upgrade but after a while (supposedly after these two
packages) an upgrade was interrupted showing numerous "segmentation
fault" errors.

Then almost for every command in shell I got "segmentation fault". I was
surprised. I tried to log into another tty, but failed. Then I tried to
reboot... And got a kernel panic after 2 seconds of system bootstrap.

I took a livecd. I failed to chroot (got the same "segfault problem"). I
supposed that I had some problems with libc6, so I took a package
libc6_2.19-9_amd64.deb from /var/cache/apt/archives and unpacked it into
the root mount point via `dpkg-deb -x <pkg>'. After that I managed to
chroot into the system.

I tried to finish an upgrade process, but I got the same faults.
I put here inline the first lines of `apt-get upgrade' output:
--------------------
# apt-get upgrade
Reading package lists...
Building dependency tree...
Reading state information...
The following packages were automatically installed and are no longer required:
  alsa-base libabw-0.0-0 libcdr-0.0-0 libe-book-0.0-0 libetonyek-0.0-0
  libfreehand-0.0-0 libgeoclue0 libmspub-0.0-0 libmwaw-0.2-2 libodfgen-0.0-0
  liborcus-0.6-0 libvisio-0.0-0 libwpd-0.9-9 libwpg-0.2-2 libwps-0.2-2
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
108 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up liblcms2-2:i386 (2.6-3) ...
Setting up libmbim-glib0:amd64 (1.8.0-1) ...
dpkg: error processing package libmbim-glib0:amd64 (--configure):
 subprocess installed post-installation script was killed by signal (Segmentation fault)
Setting up libmm-glib0:amd64 (1.2.0-1) ...
dpkg: error processing package libmm-glib0:amd64 (--configure):
 subprocess installed post-installation script was killed by signal (Segmentation fault)
Setting up libmng1:i386 (1.0.10+dfsg-3.1) ...
...
--------------------

After it I had to unpack libc6 package again.

Then I looked intently at the first package with problems
(libmbim-glib0). I unpacked it and saw in the postinst script the
command `ldconfig'.

After a while I realized that "segfaults" happen after and only after
execution of `ldconfig'.

I managed with the problem by downgrading libc6 and libc-bin (amd64 and
i386 versions both, because I'm using multiarch) back to the version
2.19-4 from the apt cache.

I suppose that there's some problems with caches which ldconfig
generates for ld.


-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (500, 'testing'), (1, 'stable'), (1, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages libc-bin depends on:
pn  libc6    <none>
ii  libcap2  1:2.24-4

libc-bin recommends no packages.

libc-bin suggests no packages.

-- Configuration Files:
/etc/gai.conf changed:

/etc/ld.so.conf changed:
include ld.so.conf.d/*.conf
include /etc/ld.so.conf.d/*.conf



-- no debconf information




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