Update (12/2/14): This is still a problem in Ubuntu, however the bug has been fixed in Samba itself since version 4.1.10. The latest version in Ubuntu’s repositories for some reason is still 4.1.6, which mean the bug still exists for us.
no talloc stackframe at ../source3/param/loadparm.c:4864, leaking memory
I have been getting this error whenever I set up an Ubuntu 14.04 machine with Samba, also when I upgraded a 12.04 LTS with Samba. This apparently is a bug problem between Samba and PAM authentication. Hopefully soon a fix will come out and get this resolved, because even the work around is not good.
Basically, the work around is to run “sudo pam-auth-update” and uncheck “SMB password synchronization”. This prevents Samba from getting updated passwords from PAM and vice-versa. This also prevents Samba from getting new passwords/accounts. If you have an existing Samba server, don’t upgrade until this problem has been resolved.
To add a user to Samba, use:
pdbedit -a -u samba_user
See the reported bug at: https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1257186