ecryptfs-setup-private creates .ecryptfs dir with wrong permissions when GID is different than UID

When creating a new user with a GID different than the UID using adduser --encrypt-home, the GID is not passed at all from adduser to ecryptfs-setup-private:

      if (defined($encrypt_home)) {
        printf gtx("Setting up encryption ...\n") if $verbose;
        &systemcall($ecryptfs_setup_private, '-b', '-u', $new_name);
      }

ecryptfs-setup-private then blindly chowns to $USER:$USER assuming the GID matches the UID:

        chown $USER:$USER "$CRYPTDIR" /dev/shm/.ecryptfs-$USER
        (multiple chowns below this)

sciri@baka:~$ sudo adduser --encrypt-home --gid 2500 testuser
Adding user `testuser' ...
Adding new user `testuser' (1000) with group `warthogs' ...
Creating home directory `/home/testuser' ...
Setting up encryption ...

************************************************************************
YOU SHOULD RECORD YOUR MOUNT PASSPHRASE AND STORE IT IN A SAFE LOCATION.
  ecryptfs-unwrap-passphrase ~/.ecryptfs/wrapped-passphrase
THIS WILL BE REQUIRED IF YOU NEED TO RECOVER YOUR DATA AT A LATER TIME.
************************************************************************

Done configuring.

chown: invalid group: `testuser:testuser'
chown: invalid group: `testuser:testuser'
chown: invalid group: `testuser:testuser'
chown: invalid group: `testuser:testuser'
chown: invalid group: `testuser:testuser'
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for testuser
Enter the new value, or press ENTER for the default
 Full Name []:
 Room Number []:
 Work Phone []:
 Home Phone []:
 Other []:
Is the information correct? [Y/n] y
sciri@baka:~$ sudo ls -al /home/.ecryptfs/testuser/
total 16
drwxr-xr-x 4 root root 4096 2009-10-08 10:27 .
drwxr-xr-x 3 root root 4096 2009-10-08 10:27 ..
drwx------ 2 root root 4096 2009-10-08 10:27 .ecryptfs
drwx------ 2 root root 4096 2009-10-08 10:27 .Private

sciri@baka:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu karmic (development branch)
Release: 9.10
Codename: karmic
sciri@baka:~$ apt-cache policy adduser
adduser:
  Installed: 3.110ubuntu6
  Candidate: 3.110ubuntu6
  Version table:
 *** 3.110ubuntu6 0
        500 http://archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status
sciri@baka:~$ apt-cache policy ecryptfs-utils
ecryptfs-utils:
  Installed: 81-0ubuntu1
  Candidate: 81-0ubuntu1
  Version table:
 *** 81-0ubuntu1 0
        500 http://archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status

This bug was fixed in the package ecryptfs-utils - 81-0ubuntu2

---------------
ecryptfs-utils (81-0ubuntu2) karmic; urgency=low

  * src/utils/ecryptfs-setup-private: fix bug where setup-private
    incorrectly assumed that the home/private dir ownerships should
    be owned by USER:USER; instead, default to USER:GROUP, where
    GROUP is the USER's primary group by default, cherry-pick upstream
    r463, LP: #445301

 -- Dustin Kirkland <email address hidden> Wed, 14 Oct 2009 14:20:42 -0500