# ceph
Segmentation fault

# ceph -s
Segmentation fault

# rados ls
*** Caught signal (Segmentation fault) **
 in thread 7f1c7d99f760
Segmentation fault

It appears it segfaults after trying to pull some info from ceph-mon:
# ceph --help

General usage:
==============
...
Monitor commands:
=================
[Contacting monitor, timeout after 5 seconds]
Segmentation fault

Connecting to ceph-mon using socket works well:
# ceph --admin-daemon /var/run/ceph/ceph-mon.0.asok mon_status
{ "name": "0",
  "rank": 0,
  "state": "leader",
  "election_epoch": 192,
  "quorum": [
        0,
        1,
        2],
  "outside_quorum": [],
  "extra_probe_peers": [],
  "sync_provider": [],
  "monmap": { "epoch": 3,
      "fsid": "63935a65-c16d-4036-8ab2-10660ab9da82",
      "modified": "2015-03-31 18:30:49.896090",
      "created": "2015-03-31 18:29:39.457490",
      "mons": [
            { "rank": 0,
              "name": "0",
              "addr": "10.5.5.2:6789\/0"},
            { "rank": 1,
              "name": "1",
              "addr": "10.5.5.3:6789\/0"},
            { "rank": 2,
              "name": "2",
              "addr": "10.5.5.4:6789\/0"}]}}