Bug#785596: kde-plasma-desktop: Permission denied for VBoxLinuxAdditions.run mounted with KDE

[Vincas Dargis <vindrg@gmail.com>]

Package: kde-plasma-desktop
Version: 5:84
Severity: important

Dear Maintainer,

Firs of all, I have no idea which packages is actually responsible for this, so
please reassign this bug if needed.

I have testing Debian 8 Jessie installed in Virtualbox 4.3.28 (Debian Wheezy
amd64 host), and time to time I have to upgrade Virtualbox Additions, but I
cannot execute VBoxLinuxAdditions.run from command line if I mount additions
..iso using KDE plasma desktop "Available devices" widget.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

I've mounted .iso image with "Available devices" widget, launched Konsole and
tried to execute installer:

test@debian8:~$ cd /media/cdrom0
test@debian8:/media/cdrom0$ ls
32Bit  AUTORUN.INF  cert  runasroot.sh            VBoxSolarisAdditions.pkg
VBoxWindowsAdditions.exe
64Bit  autorun.sh   OS2   VBoxLinuxAdditions.run  VBoxWindowsAdditions-
amd64.exe  VBoxWindowsAdditions-x86.exe
test@debian8:/media/cdrom0$ stat ./VBoxLinuxAdditions.run
  File: ‘./VBoxLinuxAdditions.run’
  Size: 7136717         Blocks: 13939      IO Block: 2048   regular file
Device: b00h/2816d      Inode: 1825        Links: 1
Access: (0555/-r-xr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2015-05-13 19:13:00.000000000 +0300
Modify: 2015-05-13 19:12:56.000000000 +0300
Change: 2015-05-13 19:13:00.000000000 +0300
 Birth: -
test@debian8:/media/cdrom0$ sudo ./VBoxLinuxAdditions.run
[sudo] password for test:
sudo: unable to execute ./VBoxLinuxAdditions.run: Permission denied


If i mount manually, it works OK:

test@debian8:/$ sudo mount /dev/sr0 /media/cdrom0
mount: /dev/sr0 is write-protected, mounting read-only
test@debian8:/$ cd /media/cdrom0
test@debian8:/media/cdrom0$ ls
32Bit  AUTORUN.INF  cert  runasroot.sh            VBoxSolarisAdditions.pkg
VBoxWindowsAdditions.exe
64Bit  autorun.sh   OS2   VBoxLinuxAdditions.run  VBoxWindowsAdditions-
amd64.exe  VBoxWindowsAdditions-x86.exe
test@debian8:/media/cdrom0$ stat VBoxLinuxAdditions.run
  File: ‘VBoxLinuxAdditions.run’
  Size: 7136717         Blocks: 13939      IO Block: 2048   regular file
Device: b00h/2816d      Inode: 1825        Links: 1
Access: (0555/-r-xr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2015-05-13 19:13:00.000000000 +0300
Modify: 2015-05-13 19:12:56.000000000 +0300
Change: 2015-05-13 19:13:00.000000000 +0300
 Birth: -
test@debian8:/media/cdrom0$ sudo ./VBoxLinuxAdditions.run
Verifying archive integrity... All good.

As a walkaround, I can use explicit "sh" to execute with KDE mount:
$ sudo sh VBoxLinuxAdditions.run



   * What was the outcome of this action?
Cannot launch executable from cdrom when it's mounted using KDE Plasma desktop.

   * What outcome did you expect instead?
I should be able to execute applications from mounted cdrom.



-- System Information:
Debian Release: 8.0
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages kde-plasma-desktop depends on:
ii  kde-baseapps    4:4.14.2-1
ii  kde-runtime     4:4.14.2-2
ii  kde-workspace   4:4.11.13-2
ii  plasma-desktop  4:4.11.13-2
ii  udisks2         2.1.3-5
ii  upower          0.99.1-3.2

Versions of packages kde-plasma-desktop recommends:
ii  kdm           4:4.11.13-2
ii  xserver-xorg  1:7.7+7

Versions of packages kde-plasma-desktop suggests:
pn  kde-l10n  <none>

-- no debconf information