libpam-ssh does not support keys stored on xfs volumes

[Matt Smith]

Presumably this is because xfs does not support returning the d_type field as described here: http://man7.org/linux/man-pages/man2/getdents.2.html resulting in a return of DT_UNKNOWN that goes unhandled.

Feb 2 16:53:32 bastion-133 pam_ssh[4911]: init authentication module
Feb 2 16:53:32 bastion-133 pam_ssh[4911]: file 'id_rsa' discarded.
Feb 2 16:53:32 bastion-133 pam_ssh[4911]: Asking for SSH key passphrase.
Feb 2 16:53:33 bastion-133 root: root : TTY=/dev/pts/0 ; PWD=/root/.ssh ; USER=root ; COMMAND=cd .ssh
Feb 2 16:53:34 bastion-133 root: root : TTY=/dev/pts/0 ; PWD=/root/.ssh ; USER=root ; COMMAND=ls
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: Looking for SSH keys in '/vol/ebs1/home/msmith/.ssh/session-keys.d'.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: No SSH session-keys directory.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: Looking for SSH keys in '/vol/ebs1/home/msmith/.ssh/login-keys.d'.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: Looking for SSH keys in '/vol/ebs1/home/msmith/.ssh'.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: SSH key candidate 'id_ed25519'.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: debug1: key_load_private: No such file or directory
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: SSH key candidate 'id_ed25519' failed.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: SSH key candidate 'id_ecdsa'.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: debug1: key_load_private: No such file or directory
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: SSH key candidate 'id_ecdsa' failed.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: SSH key candidate 'id_dsa'.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: debug1: key_load_private: No such file or directory
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: SSH key candidate 'id_dsa' failed.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: SSH key candidate 'id_rsa'.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: SSH key 'id_rsa' decrypted.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: SSH key candidate 'identity'.
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: debug1: key_load_private: No such file or directory
Feb 2 16:53:36 bastion-133 pam_ssh[4911]: SSH key candidate 'identity' failed.
Feb 2 16:53:36 bastion-133 bastion-sshd[4516]: error: PAM: Authentication failure for msmith from