I'm concerned that this bug exposes a very severe security bug in X, at
least, on affected hardware.

If I understand correctly, I could create a pixmap, not initialize it, and
thus gain access to various bits of previous screen real-estate.  (Note
that people have seen on their display desktop bits from the previous
login, or from the previous *boot *provided the system hasn't been powered
off.)

Can we start the process now for addressing that?

On Tue, Mar 20, 2012 at 1:25 AM, Launchpad Bug Tracker <
<email address hidden>> wrote:

> This bug was fixed in the package unity-greeter - 0.2.5-0ubuntu2
>
> ---------------
> unity-greeter (0.2.5-0ubuntu2) precise; urgency=low
>
>  * debian/patches/fix_login_corruption.patch:
>    - Fix setting of root window background pixmap.  Fixes "corruption"
>      seen between unity-greeter and Unity start, which was actually just
>      random bits of VRAM in an uninitialised pixmap.  (LP: #931967)
>  -- Christopher James Halse Rogers <email address hidden>   Tue, 20 Mar 2012
> 18:51:43 +1100
>
> ** Changed in: unity-greeter (Ubuntu Precise)
>        Status: In Progress => Fix Released
>
> --
> You received this bug notification because you are a member of Goobuntu
> Team, which is subscribed to the bug report.
> https://bugs.launchpad.net/bugs/931967
>
> Title:
>  Corrupted graphics after the login  until the unity launcher appears
>
> Status in OEM Priority Project:
>  Triaged
> Status in OEM Priority Project precise series:
>  In Progress
> Status in “unity-greeter” package in Ubuntu:
>   Fix Released
> Status in “unity-greeter” source package in Precise:
>   Fix Released
>
> Bug description:
>  With the latest updates im getting corrupted graphics - images after
>  the login  until the unity launcher  - desktop appears  and this is
>  happening in every system restart - relogin.
>
>  Im attaching a screenshot of what im getting , it looks like its a
>  combination  of corrupted images from the windows that was running
>  while i was doing the latest updates , my  last session before the
>  problem.
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 12.04
>  Package: xorg 1:7.6+10ubuntu1
>  ProcVersionSignature: Ubuntu 3.2.0-15.24-generic 3.2.5
>  Uname: Linux 3.2.0-15-generic x86_64
>  NonfreeKernelModules: nvidia
>  .proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory:
> '/proc/driver/nvidia/gpus/0'
>  .proc.driver.nvidia.registry: Binary: ""
>  .proc.driver.nvidia.version:
>   NVRM version: NVIDIA UNIX x86_64 Kernel Module  290.10  Wed Nov 16
> 17:39:29 PST 2011
>   GCC version:  gcc version 4.6.2 (Ubuntu/Linaro 4.6.2-12ubuntu1)
>  .tmp.unity.support.test.0:
>
>  ApportVersion: 1.91-0ubuntu1
>  Architecture: amd64
>  CompizPlugins:
> [core,bailer,detection,composite,opengl,decor,regex,animation,snap,move,place,mousepoll,vpswitch,wall,resize,gnomecompat,workarounds,compiztoolbox,grid,imgpng,expo,fade,ezoom,scale,session,switcher,unityshell]
>  CompositorRunning: compiz
>  Date: Tue Feb 14 11:40:18 2012
>  DistUpgraded: Log time: 2011-09-27 15:36:23.910451
>  DistroCodename: precise
>  DistroVariant: ubuntu
>  GraphicsCard:
>   NVIDIA Corporation G86 [GeForce 8600M GS] [10de:0425] (rev a1) (prog-if
> 00 [VGA controller])
>     Subsystem: Sony Corporation Device [104d:9005]
>  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64
> (20110427.1)
>  JockeyStatus:
>   xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary,
> Enabled, In use)
>   xorg:nvidia_current_updates - NVIDIA accelerated graphics driver
> (post-release updates) (Proprietary, Disabled, Not in use)
>  MachineType: Sony Corporation VGN-FZ31Z
>  PccardctlIdent:
>   Socket 0:
>     no product info available
>  PccardctlStatus:
>   Socket 0:
>     no card
>  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-15-generic
> root=UUID=12e02107-7815-4276-b7ac-7bceee898897 ro quiet splash vt.handoff=7
>  SourcePackage: xorg
>  UpgradeStatus: Upgraded to precise on 2012-02-02 (11 days ago)
>  XorgConf:
>   Section "Device"
>    Identifier  "Default Device"
>    Option      "NoLogo"        "True"
>   EndSection
>  dmi.bios.date: 12/21/2007
>  dmi.bios.vendor: Phoenix Technologies LTD
>  dmi.bios.version: R2110J7
>  dmi.board.asset.tag: N/A
>  dmi.board.name: VAIO
>  dmi.board.vendor: Sony Corporation
>  dmi.board.version: N/A
>  dmi.chassis.asset.tag: N/A
>  dmi.chassis.type: 10
>  dmi.chassis.vendor: Sony Corporation
>  dmi.chassis.version: N/A
>  dmi.modalias:
> dmi:bvnPhoenixTechnologiesLTD:bvrR2110J7:bd12/21/2007:svnSonyCorporation:pnVGN-FZ31Z:pvrC6006UGW:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
>  dmi.product.name: VGN-FZ31Z
>  dmi.product.version: C6006UGW
>  dmi.sys.vendor: Sony Corporation
>  version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu1
>  version.ia32-libs: ia32-libs 20090808ubuntu33
>  version.libdrm2: libdrm2 2.4.30-1ubuntu1
>  version.libgl1-mesa-dri: libgl1-mesa-dri 8.0~rc2-0ubuntu5
>  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
>  version.libgl1-mesa-glx: libgl1-mesa-glx 8.0~rc2-0ubuntu5
>  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
>  version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu3
>  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev
> 1:2.6.99.901+git20120126-0ubuntu2
>  version.xserver-xorg-video-ati: xserver-xorg-video-ati
> 1:6.14.99~git20111219.aacbd629-0ubuntu2
>  version.xserver-xorg-video-intel: xserver-xorg-video-intel
> 2:2.17.0-1ubuntu3
>  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
> 1:0.0.16+git20111201+b5534a1-1build2
>
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