Ceph Kernel module libceph: null deref in osd_reset -> __reset_osd -> __remove_osd

Issue

• Ceph Kernel module: libceph: null deref in osd_reset -> __reset_osd -> __remove_osd

Call Trace:
 [<ffffffffa07eaed1>] ? __remove_osd+0x31/0x80 [libceph]
 [<ffffffffa07eb139>] ? __reset_osd+0x109/0x110 [libceph]
 [<ffffffffa07ec445>] ? osd_reset+0x55/0x200 [libceph]
 [<ffffffffa07e5fa5>] ? con_work+0xd15/0x2210 [libceph]
 [<ffffffff8106d9c4>] ? process_one_work+0x174/0x4a0
 [<ffffffff8106ed6b>] ? worker_thread+0x11b/0x370
 [<ffffffff8106ec50>] ? manage_workers.isra.20+0x2d0/0x2d0
 [<ffffffff81075809>] ? kthread+0xc9/0xe0
 [<ffffffff81075740>] ? flush_kthread_worker+0xb0/0xb0
 [<ffffffff816b20ac>] ? ret_from_fork+0x7c/0xb0
 [<ffffffff81075740>] ? flush_kthread_worker+0xb0/0xb0