[Bug 1724013] Re: mount does not correctly process x-* options

[DaytonaJohn]

After further investigation, it turns out that mount is actually
handling the options correctly and passing the options (with x-* options
removed) to mount.cifs. The problem is that mount.cifs ignores those
passed options if the user running the mount command is not root, and
just grabs the options from fstab without removing the x-* options. So
the problem is actually in mount.cifs that it does not correctly handle
x-* options (and probably doesn't handle "comment=" options correctly
either).

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to util-linux in Ubuntu.
https://bugs.launchpad.net/bugs/1724013

Title:
  mount does not correctly process x-* options

Status in util-linux package in Ubuntu:
  New

Bug description:
  According to the mount(8) man page:

  All options prefixed with "x-" are interpreted as comments or as
  userspace application-specific options.  These options are not stored
  in  the  mtab  file,  nor  sent  to  the mount.type helpers nor to the
  mount(2) system call.  The suggested format is x-appname.option (e.g.
  x-systemd.automount).

  However, adding any such option to cifs entry, such as "x-test.opt"
  (other than x-systemd.automount) results in:

  mount error(22): Invalid argument
  Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

  No options starting with "x-" should be passed to mount.cifs, so the
  mount should succeed.

  Running Ubuntu 16.04.3 LTS
  mount package installed is 2.27.1-6ubuntu3.3

  This error always happens when such an option is specified. Here is an example fstab line that causes this failure:
  //192.168.1.3/Public    /mnt/mybook    cifs   noauto,x-test.opt,rw,users,noperm,guest,soft,cache=none,sec=none  0  0

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: mount 2.27.1-6ubuntu3.3
  ProcVersionSignature: Ubuntu 4.4.0-97.120-generic 4.4.87
  Uname: Linux 4.4.0-97-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Mon Oct 16 12:29:40 2017
  InstallationDate: Installed on 2016-04-22 (542 days ago)
  InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/usr/bin/tcsh
  SourcePackage: util-linux
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1724013/+subscriptions