[Bug 1522675] Re: Warning messages about unsandboxed downloads

[Steve Langasek]

>From what I gathered, msttcorefonts and flashplugin-nonfree
> (flashplugin-installer) are affected by this, hence adding tasks for
> them.

These packages invoke update-notifier for the downloading; reassigning.

I don't see what value this sandbox user is providing, however, and why
apt needs to be so noisy about it.  Is this about not running the
network client code as root?  Clearly, anything downloaded is going to
be handled as root once it's there.

** Package changed: flashplugin-nonfree (Ubuntu) => update-notifier
(Ubuntu)

** No longer affects: msttcorefonts (Ubuntu)

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https://bugs.launchpad.net/bugs/1522675

Title:
  Warning messages about unsandboxed downloads

Status in apt package in Ubuntu:
  Fix Released
Status in update-notifier package in Ubuntu:
  New
Status in apt package in Debian:
  Fix Released
Status in synaptic package in Debian:
  New

Bug description:
  Recently we got new versions for synaptic 0.82+build1 & apt 1.1.3, but
  now get that error when installing/upgrading some packages:

  Setting up libc6-dbg:amd64 (2.21-0ubuntu5) ...
  Processing triggers for libc-bin (2.21-0ubuntu5) ...
  W: Can't drop privileges for downloading as file '/root/.synaptic/tmp//tmp_cl' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)

  From nautilus, i'm seeing a /root/ folder locked (x on its icon) and
  the folder is empty (no /.synaptic/ sub-folder or file), so the above
  error.

  oem at u64:~$ ls -l .synaptic
  total 4
  -rw-rw-r-- 1 oem oem   0 Aug 25 11:19 options
  -rw-rw-r-- 1 oem oem 236 Aug 25 11:19 synaptic.conf

  oem at u64:~$ ls -l /var/lib/apt/lists/
  ....
  -rw-r----- 1 root root        0 Sep 20 06:36 lock
  drwx------ 2 _apt root    16384 Sep 24 15:25 partial
  ......

  oem at u64:~$ sudo ls -l /var/lib/update-notifier/package-data-downloads/
  .....
  drwxr-xr-x 2 _apt root 4096 Sep 22 23:33 partial

  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: synaptic 0.82+build1
  ProcVersionSignature: Ubuntu 4.3.0-1.10-generic 4.3.0
  Uname: Linux 4.3.0-1-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.19.2-0ubuntu8
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Fri Dec  4 05:23:25 2015
  SourcePackage: synaptic
  UpgradeStatus: No upgrade log present (probably fresh install)

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