Comment 5 for bug 117736

Also present in hardy. pam_mount can't unmount on logout:

pam_mount(misc.c:285) command: /sbin/umount.crypt [/home/crypt/]
pam_mount(misc.c:56) set_myuid<pre>: (uid=1001, euid=1001, gid=1001, egid=1001)
pam_mount(misc.c:358) error setting uid to 0
pam_mount(mount.c:104) umount errors:
pam_mount(mount.c:107) You have to be root to use cryptsetup!
pam_mount(mount.c:107) umount: only root can unmount UUID=3d6517a4-b0b1-4e74-8b29-47853e187a13 from /home/crypt
pam_mount(mount.c:107) umount.crypt: error unmounting /home/crypt/
pam_mount(mount.c:596) waiting for umount
pam_mount(pam_mount.c:624) unmount of /dev/sda6 failed
pam_mount(pam_mount.c:635) pam_mount execution complete

This leaves the encrypted volume mounted, and attached to the device mapper (/dev/mapper/_dev_sda6 allows access to the unencrypted data). This allows access to the volume in plaintext after the user has logged out.