[Pkg-virtualbox-devel] Bug#600177: virtualbox-ose: out of disk while merging a snapshot destroys the disk image

[Adam Borowski]

Package: virtualbox-ose
Version: 3.2.8-dfsg-2
Severity: grave
Justification: causes serious data loss

If you elect to merge the current state of a differentiating disk image into
the base ("deleting a snapshot") and run out of disk space on the host
filesystem while merging, the resulting image will be corrupted.

I happened to look at the ~/.VirtualBox/VDI and
~/.VirtualBox/Machines/${machine}/Snapshot directories before trying to
continue, they did have both the base image and the differential one, so at
this point I guess it would be recoverable by simply restarting -- sectors
that were already overwritten by the new values would be overwritten with
the same data again.  However, when retrying the merge, VirtualBox started
merging a second disk (the virtual machine in question had two) and deleted
the first differential image.


-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (200, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.32-5-686 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages virtualbox-ose depends on:
ii  adduser                 3.112            add and remove users and groups
ii  libc6                   2.11.2-6         Embedded GNU C Library: Shared lib
ii  libcurl3                7.21.0-1         Multi-protocol file transfer libra
ii  libgcc1                 1:4.4.5-2        GCC support library
ii  libpng12-0              1.2.44-1         PNG library - runtime
ii  libpython2.6            2.6.6-3          Shared Python runtime library (ver
ii  libsdl1.2debian         1.2.14-6         Simple DirectMedia Layer
ii  libssl0.9.8             0.9.8o-2         SSL shared libraries
ii  libstdc++6              4.4.5-2          The GNU Standard C++ Library v3
ii  libvncserver0           0.9.7-2+b1       API to write one's own vnc server
ii  libx11-6                2:1.3.3-3        X11 client-side library
ii  libxcursor1             1:1.1.10-2       X cursor management library
ii  libxext6                2:1.1.2-1        X11 miscellaneous extension librar
ii  libxml2                 2.7.7.dfsg-4     GNOME XML library
ii  libxmu6                 2:1.0.5-2        X11 miscellaneous utility library
ii  libxt6                  1:1.0.7-1        X11 toolkit intrinsics library
ii  python                  2.6.6-3          interactive high-level object-orie
ii  python-central          0.6.16+nmu1      register and build utility for Pyt
ii  zlib1g                  1:1.2.3.4.dfsg-3 compression library - runtime

Versions of packages virtualbox-ose recommends:
ii  libgl1-mesa-glx [libgl1]    7.7.1-4      A free implementation of the OpenG
ii  libqt4-opengl               4:4.6.3-1+b1 Qt 4 OpenGL module
ii  libqtcore4                  4:4.6.3-1+b1 Qt 4 core module
ii  libqtgui4                   4:4.6.3-1+b1 Qt 4 GUI module
ii  virtualbox-ose-dkms         3.2.8-dfsg-2 x86 virtualization solution - kern
ii  virtualbox-ose-qt           3.2.8-dfsg-2 x86 virtualization solution - Qt b
ii  virtualbox-ose-source       3.2.8-dfsg-2 x86 virtualization solution - kern

Versions of packages virtualbox-ose suggests:
ii  libasound2                    1.0.23-2   shared library for ALSA applicatio
ii  libpulse0                     0.9.21-3   PulseAudio client libraries
pn  vde2                          <none>     (no description available)
ii  virtualbox-guest-additions    3.2.8-1    guest additions iso image for Virt

-- debconf information:
  virtualbox-ose/upstream_version_change: false