[Bug 1674164] [NEW] DVDs with restricted permissions are unreadable for normal user (regression?)

[mikbini]

Public bug reported:

I'm using 16.10. I have a DVD with strange permissions for the root
folder:

michele at cassandra:~$ ls -l /media/michele
total 2
d--x--x--- 3 michele michele 88 gen  1  2004 SONY_DVD_RECORDER_VOLUME

The DVD is readable e.g. on windows but with ubuntu while I can access
it as root:

root at cassandra:~# ls -l /media/michele/SONY_DVD_RECORDER_VOLUME/
total 4
dr-xr-xr-x 2 michele michele 3628 gen  1  2004 VIDEO_TS

I cannot as the non-root user that is logged in when I insert the disk:

michele at cassandra:~$ ls -l /media/michele/SONY_DVD_RECORDER_VOLUME
ls: cannot open directory '/media/michele/SONY_DVD_RECORDER_VOLUME': Permission denied

Looking at the mount options it seems to me that this is a regression
for bug #10550. The options used by udisks2 are:

root at cassandra:~# mount |grep SONY
/dev/sr0 on /media/michele/SONY_DVD_RECORDER_VOLUME type udf (ro,nosuid,nodev,relatime,uid=1000,gid=1000,iocharset=utf8,uhelper=udisks2)

while my understanding from bug #10550 is that I should have also
mode=0777 and dmode=0777

And indeed this works:

root at cassandra:~# mount -t udf -o
ro,nosuid,nodev,relatime,uid=1000,gid=1000,iocharset=utf8,uhelper=udisks2,mode=0777,dmode=0777
/dev/sr0 ~michele/z

michele at cassandra:~$ ls -l ~michele/z
total 4
drwxrwxrwx 2 michele michele 3628 gen  1  2004 VIDEO_TS

** Affects: util-linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1674164

Title:
  DVDs with restricted permissions are unreadable for normal user
  (regression?)

Status in util-linux package in Ubuntu:
  New

Bug description:
  I'm using 16.10. I have a DVD with strange permissions for the root
  folder:

  michele at cassandra:~$ ls -l /media/michele
  total 2
  d--x--x--- 3 michele michele 88 gen  1  2004 SONY_DVD_RECORDER_VOLUME

  The DVD is readable e.g. on windows but with ubuntu while I can access
  it as root:

  root at cassandra:~# ls -l /media/michele/SONY_DVD_RECORDER_VOLUME/
  total 4
  dr-xr-xr-x 2 michele michele 3628 gen  1  2004 VIDEO_TS

  I cannot as the non-root user that is logged in when I insert the
  disk:

  michele at cassandra:~$ ls -l /media/michele/SONY_DVD_RECORDER_VOLUME
  ls: cannot open directory '/media/michele/SONY_DVD_RECORDER_VOLUME': Permission denied

  Looking at the mount options it seems to me that this is a regression
  for bug #10550. The options used by udisks2 are:

  root at cassandra:~# mount |grep SONY
  /dev/sr0 on /media/michele/SONY_DVD_RECORDER_VOLUME type udf (ro,nosuid,nodev,relatime,uid=1000,gid=1000,iocharset=utf8,uhelper=udisks2)

  while my understanding from bug #10550 is that I should have also
  mode=0777 and dmode=0777

  And indeed this works:

  root at cassandra:~# mount -t udf -o
  ro,nosuid,nodev,relatime,uid=1000,gid=1000,iocharset=utf8,uhelper=udisks2,mode=0777,dmode=0777
  /dev/sr0 ~michele/z

  michele at cassandra:~$ ls -l ~michele/z
  total 4
  drwxrwxrwx 2 michele michele 3628 gen  1  2004 VIDEO_TS

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