sshd: ../../include/k5-thread.h:704: k5_mutex_finish_init_1: Assertion `(&(&m->os)->n)->initialized != K5_MUTEX_DEBUG_INITIALIZED' failed.

[Simon Wilkinson]

Is pam_krb5 linked against the same Kerberos library as openssh?

If you're building OpenSSH from source, it's possible that you're  
picking up Umich's broken libgssapi (which is there for NFSv4  
support), and not the MIT Kerberos libgssapi_krb5 (RedHat's spec file  
has a hack to avoid this). Check that you're linking against the  
correct GSSAPI library, too.

Cheers,

Simon.