Hi all....

I have a chroot jail setup where I want the user to be able to create and mount a loopback device. The block loop device is correct and all needed commands etc are in place (as far as I know)

I try the following:

$ losetup /dev/loop0 /home/jaileduser/data.crypt
memlock: Cannot allocate memory
Couldn't lock into memory, exiting.

So I check the memory allocation
$ ulimit -l
32

so I try:
$ulimit -l unlimited

but get the error:
ulimit: max locked memory: cannot modify limit: Operation not permitted

How can i modify this value for each chroot user or am I being mislead by the error and have forgotted something that I need to have this setup work?

Thanks in advance for any help

I found that this only happens when I use ssh - if I su to the account then the ulimit is set to unlimited (if this matters).
Is there a limit on the mem that ssh can use and can it be changed?

If I set the ulimit -l unlimited as root then su it keeps the settings - how can I change this so it uses it for all users/logons etc?

I also tried creating a etc/security/limits.conf with memloch set hard to a high value then added ulimit -l unlimited in the bashrc script - still doesn't change the memlock value when ssh/su into chroot account
Is it this that I need to change or am I on a false lead??

Anybody any ideas?

only root can use memlock

Thanks for the reply....

How can I set this system wide so it is higher for all sessions - inc ssh etc?
Do you think this is what is causing the problem?

Set ulimit -l unlimited in /etc/profile
Then you can set on a per user basis by adding ulimit -l 32 (or whatever) to .bashrc in the users home