User-Agent:       Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0)
like Gecko
Build Identifier: 

>From time to time my (storage) Server crashed with a kernel Oops. yesterday I
had the Chance to take a photo from the Screen some seconds before the crash.

BUG: unable to handle kernel NULL pointer dereference at 00000000000000f0
IP: [<ffffffff815d143b>] _raw_spin_lock_irqsave+0x1b/0x50
Oops: 0002 [#1] SMP

Full trace is shown by the Screen photograph
https://cloudstore.zih.tu-dresden.de/public.php?service=files&t=5b54cd5f86db527684be90aff5396abd

Reproducible: Couldn't Reproduce

Steps to Reproduce:
1. not reproduceable, crash seems to be at random time, but correlates with
(IO)load 
2.
3.