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82303
n00b
Joined: 01 Dec 2004
Posts: 44
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 Posted: Tue Sep 28, 2010 9:18 am Post subject: [solved] ecryptfs unmounts even though the session is active |
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Hi,
I have ecryptfs'd my home partition. And it mounts on login, I can read, write, aso just fine. But the partitions gets unmounted every time I exit a console session even though there are others open and I'm logged in to my DE.
Thing is I do not want to unmount until i completely log off. It's kind of impractical to enter "su - <user>" every couple of minutes to be able read and write my files ^^
my config is as follows (according to gentoo wiki):
ecryptfs-utils are version 83
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cat /etc/pam.d/system-auth
auth required pam_env.so
auth required pam_unix.so try_first_pass likeauth nullok
auth optional pam_ecryptfs.so unwrap
account required pam_unix.so
password required pam_cracklib.so difok=2 minlen=8 dcredit=2 ocredit=2 retry=3
password optional pam_ecryptfs.so
password required pam_unix.so try_first_pass use_authtok nullok sha512 shadow
session required pam_limits.so
session required pam_env.so
session required pam_unix.so
session optional pam_ecryptfs.so unwrap
session optional pam_permit.so
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Is there a way to fix this issue or disable just automatic unmounting?
Thx for your help.
Cheers,
Stefan
Last edited by 82303 on Tue Sep 28, 2010 12:55 pm; edited 1 time in total |
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82303
n00b
Joined: 01 Dec 2004
Posts: 44
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| Posted: Tue Sep 28, 2010 12:54 pm Post subject: |
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Well,
fixed problem myself.
In the directory /home/<user>/.ecryptfs/ was an empty file called "auto_umount", which I deleted.
Since then, no unwanted unmountings anymore.
Cheers,
Stefan |
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muczy
n00b
Joined: 29 Sep 2006
Posts: 45
Location: Szeged, Hungary, Europe
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| Posted: Tue Oct 26, 2010 1:52 pm Post subject: |
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I also have this problem and deleting auto-unmount solves the issue however this workaround makes gdm wait for about 5 seconds on shutdown...
I think I will report this as a bug. |
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KingBeeXC
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Joined: 10 Jan 2007
Posts: 4
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| Posted: Sun Jun 26, 2011 3:45 pm Post subject: |
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I ran into this problem today and discovered that my umounts were related to me using sudo. Encyptfs keeps track of number of sessions open by using pam and a counter stored in /dev/shm/ecryptfs-????-Private. When the counter gets to 0 the home directory is unmounted. When you delete the "auto_umount" this stops the counter from getting decremented, which means once mounted your home directory will never be unmounted through ecryptfs. The home directory not being unmounted as expected is probably causing the gdm hang.
I am not that familiar with Pam and exactly how it operates but I tracked it down to the session optional pam_ecryptfs.so unwrap line in the /etc/pam.d/system-remote-login. What I found is that exiting a sudo session was causing ecyptfs to decrement the counter in /dev/shm/ecryptfs-????-Private. I was able to resolve this by replacing the session include system-auth line from /etc/pam.d/sudo with the system-auth session paramaters (minus the pam_ecryptfs.so unwrap line). For example:
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cat /etc/pam.d/sudo
auth include system-auth
account include system-auth
# REMOVED #session include system-auth
#added using system-auth as reference:
session required pam_limits.so
session required pam_env.so
session required pam_unix.so
session optional pam_permit.so
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There are a lot of files under pam.d that are including system-auth, so if you aren't using sudo then the problem is probably related to another pam session. |
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muczy
n00b
Joined: 29 Sep 2006
Posts: 45
Location: Szeged, Hungary, Europe
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