[Bug 385632] Re: Cannont umount FUSE filesystems when mounted on a NFS mounted directory in some cases

[Luboš Doležel]

I confirm the problem. When root cannot access the home directory of the
user (which is a common case with NFS mounts), it is impossible to
unmount a FUSE mount.

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https://bugs.launchpad.net/bugs/385632

Title:
  Cannont umount FUSE filesystems when mounted on a NFS mounted
  directory in some cases

Status in fuse package in Ubuntu:
  New

Bug description:
  
  When trying to unmount a FUSE mount that is mounted on a subdirectory of a NFS mounted directory the following error message appears sometimes:

  $ sshfs user at host:/home/user/test ./sshfs
  $ fusermount -u ./sshfs
  umount: user at host:/home/user/test: block devices not permitted on fs
  umount: user at host:/home/user/test: block devices not permitted on fs

  We have found no way to unmount this directory. fusermount -u -z does
  not help.

  
  Description:	Ubuntu 8.04.2
  Release:	8.04

  fuse-utils:
    Installed: 2.7.2-1ubuntu2
    Candidate: 2.7.2-1ubuntu2
    Version table:
   *** 2.7.2-1ubuntu2 0
          500 http://de.archive.ubuntu.com hardy/main Packages
          100 /var/lib/dpkg/status

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