Ceph

see bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=1231630

Description of problem:
Seeing Monitor Crash while creating erasure coded pool with wrong parameters

Version-Release number of selected component (if applicable):
ceph version 0.94.1 (e4bfad3a3c51054df7e537a724c8d0bf9be972ff)

How reproducible:
1/1

Steps to Reproduce:
1. Create a ec profile, with the below command.

ceph osd erasure-code-profile set myprofile plugin=lrc mapping=__DD__DD layers='[[ "_cDD_cDD", "" ],[ "cDDD____", "" ],[ "____cDDD", "" ],]' ruleset-steps='[ [ "choose", "datacenter", 3 ], [ "chooseleaf", "osd", 0] ]'

2. ceph osd pool create ecpool 12 12 erasure myprofile

Actual results: Monitoring is crashing.
BT:

ceph version 0.94.1 (e4bfad3a3c51054df7e537a724c8d0bf9be972ff)
 1: /usr/bin/ceph-mon() [0x901e52]
 2: (()+0xf130) [0x7f205a9ca130]
 3: (crush_do_rule()+0x291) [0x833501]
 4: (OSDMap::_pg_to_osds(pg_pool_t const&, pg_t, std::vector<int, std::allocator<int> >, int, unsigned int*) const+0xff) [0x77b76f]
 5: (OSDMap::_pg_to_up_acting_osds(pg_t const&, std::vector<int, std::allocator<int> >, int, std::vector<int, std::allocator<int> >, int) const+0x104) [0x77be24]
 6: (PGMonitor::map_pg_creates()+0x268) [0x65b748]
 7: (PGMonitor::post_paxos_update()+0x25) [0x65bf35]
 8: (Monitor::refresh_from_paxos(bool*)+0x221) [0x575721]
 9: (Monitor::init_paxos()+0x95) [0x575ac5]
 10: (Monitor::preinit()+0x7f1) [0x57a881]
 11: (main()+0x24a1) [0x54d881]
 12: (__libc_start_main()+0xf5) [0x7f20593d0af5]
 13: /usr/bin/ceph-mon() [0x55d0f9]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.