I have a daemon that uses the PAM API to authenticate incoming user IDs against the ‘login’ service, this daemon increases by around 56K each time it performs an authentication.<br />
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Investigation has shown that it is occurring in the pam_authenticate function and, by a process of elimination, it was found to occur in the finger print authentication module, pam_fprintd.so. This opens a local socket to /var/run/dbus/system_bus_socket but does not close it, so each time pam_authenticate is called the daemon increases its memory size by 56K.<br />
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The problem can be worked around by disabling finger print authentication with the following command:<br />
<br />
authconfig --disablefingerprint --updateall
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