I've been seeing the same behaviors with pam_ldap.so and sshd. Making
sure pam_ldap.so was disabled in /etc/pam.d/common-session fixed the
CPU consumption. Looks like ssh will have to learn how to recognize and
react correctly to PAM_IGNORE.
Someone should forward this bug to upstream.
--
Chad Walstrom <chewie@wookimus.net> http://www.wookimus.net/
assert(expired(knowledge)); /* core dump */
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