[DRBD-user] CentOS 7.3 3.10.0-514.10.2.el7.x86_64 w. DRBD v8.4.9-2: PANIC: ".1BUG: unable to handle kernel NULL pointer dereference at 0000000000000014"

Adi Pircalabu adi at ddns.com.au
Tue Apr 18 02:52:57 CEST 2017

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Hi, initially submitted here:
The node that crashed was at the time the active member of an 
active/passive Pacemaker cluster, using DRBD backed replicated storage 
for iSCSI and NFS resources.
The RedHat developer closed the bug due to loading drbd out-of-tree. The 
module is built using the source from http://git.drbd.org/drbd-8.4.git/
Even though it may or may not be related to DRBD, I thought it's worth 
having your opinion on this.
More details below.

modinfo drbd
alias:          block-major-147-*
license:        GPL
version:        8.4.9-2
description:    drbd - Distributed Replicated Block Device v8.4.9-2
author:         Philipp Reisner <phil at linbit.com>, Lars Ellenberg 
<lars at linbit.com>
rhelversion:    7.3
srcversion:     F9BD1E13798E45BA4CA1B92
depends:        libcrc32c
vermagic:       3.10.0-514.10.2.el7.x86_64 SMP mod_unload modversions
parm:           minor_count:Approximate number of drbd devices (1-255) 
parm:           disable_sendpage:bool
parm:           allow_oos:DONT USE! (bool)
parm:           proc_details:int
parm:           enable_faults:int
parm:           fault_rate:int
parm:           fault_count:int
parm:           fault_devs:int
parm:           usermode_helper:string

KERNEL: /data/adi/crash/3.10.0-514.10.2.el7.x86_64/vmlinux
     DUMPFILE: /data/adi/crash/ 
         CPUS: 12
         DATE: Sat Apr 15 02:52:55 2017
       UPTIME: 9 days, 04:22:12
LOAD AVERAGE: 0.08, 0.08, 0.05
        TASKS: 416
     NODENAME: xd3
      RELEASE: 3.10.0-514.10.2.el7.x86_64
      VERSION: #1 SMP Fri Mar 3 00:04:05 UTC 2017
      MACHINE: x86_64 (1700 Mhz)
       MEMORY: 31.9 GB
        PANIC: ".1BUG: unable to handle kernel NULL pointer dereference 
at 0000000000000014"
          PID: 0
      COMMAND: "swapper/3"
         TASK: ffff8804fa559f60 (1 of 12) [THREAD_INFO: ffff8804fa680000]
          CPU: 3

Backtrace and other information extracted after the crash attached. 
Please let me know what other information I should provide.

Adi Pircalabu
-------------- next part --------------
A non-text attachment was scrubbed...
Name: _crash.tar.gz
Type: application/x-gzip
Size: 51962 bytes
Desc: not available
URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20170418/f1338fc7/attachment.bin>

More information about the drbd-user mailing list