kernel panic involving drbd

[Justin Pryzby]

It was brought to my attention the following kernel panic:

  SYSTEM MAP: /boot/System.map-3.16.0-31-generic
DEBUG KERNEL: /usr/lib/debug/boot/vmlinux-3.16.0-31-generic
    DUMPFILE: ./dump.201503271156 [PARTIAL DUMP]
        CPUS: 12
        DATE: Fri Mar 27 12:56:49 2015
      UPTIME: 13 days, 19:14:00
LOAD AVERAGE: 1.72, 0.67, 0.28
       TASKS: 340
    NODENAME: bluegrass3
     RELEASE: 3.16.0-31-generic
     VERSION: #41~14.04.1-Ubuntu SMP Wed Feb 11 19:30:13 UTC 2015
     MACHINE: x86_64 (2397 Mhz)
      MEMORY: 63.9 GB
       PANIC: "Kernel panic - not syncing: hung_task: blocked tasks"

[1191751.738854] request: minor=1, resource=vm-appserver; but that minor belongs to resource libvirt
[1191759.892350] drbd vm-database: peer( Secondary -> Unknown ) conn( Connected -> Disconnecting ) pdsk( UpToDate -> DUnknown )
[1191759.892359] drbd vm-database: asender terminated
[1191759.892362] drbd vm-database: Terminating drbd_a_vm-datab
[1191759.892471] drbd vm-database: Connection closed
[1191759.892480] drbd vm-database: conn( Disconnecting -> StandAlone )
[1191759.892481] drbd vm-database: receiver terminated
[1191759.892485] drbd vm-database: Terminating drbd_r_vm-datab
[1191759.892497] block drbd6: disk( UpToDate -> Failed )
[1191759.902311] block drbd6: bitmap WRITE of 0 pages took 0 jiffies
[1191759.902315] block drbd6: 0 KB (0 bits) marked out-of-sync by on disk bit-map.
[1191759.902322] block drbd6: disk( Failed -> Diskless )
[1191759.902565] block drbd6: drbd_bm_resize called with capacity == 0
[1191759.902585] drbd vm-database: Terminating drbd_w_vm-datab
[1191992.802513] INFO: task drbdsetup:20254 blocked for more than 120 seconds.
[1191992.834141] Not tainted 3.16.0-31-generic #41~14.04.1-Ubuntu
[1191992.862889] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[1191992.900367] drbdsetup D ffff88085fc53440 0 20254 1 0x00000004
[1191992.900371] ffff880845967ab8 0000000000000086 ffff880abe65c750 ffff880845967fd8
[1191992.900374] 0000000000013440 0000000000013440 ffff8808546d65e0 ffff8808b5365800
[1191992.900378] 0000000000001e00 0000000000000400 000000000000000e ffff8808b5365a30
[1191992.900388] Call Trace:
[1191992.900398] [<ffffffff817675c9>] schedule+0x29/0x70
[1191992.900407] [<ffffffffc078fba5>] _drbd_request_state+0x65/0xb0 [drbd]
[1191992.900413] [<ffffffff810b4d10>] ? prepare_to_wait_event+0x100/0x100
[1191992.900418] [<ffffffffc0787a3e>] adm_detach.part.52+0x3e/0x100 [drbd]
[1191992.900422] [<ffffffffc07842f1>] ? drbd_adm_prepare.isra.48+0xd1/0x4e0 [drbd]
[1191992.900426] [<ffffffffc0787c49>] drbd_adm_detach+0x149/0x150 [drbd]
[1191992.900431] [<ffffffff81692a39>] genl_family_rcv_msg+0x199/0x380
[1191992.900432] [<ffffffff81692c20>] ? genl_family_rcv_msg+0x380/0x380
[1191992.900434] [<ffffffff81692cb1>] genl_rcv_msg+0x91/0xd0
[1191992.900436] [<ffffffff81690d39>] netlink_rcv_skb+0xa9/0xc0
[1191992.900438] [<ffffffff81691238>] genl_rcv+0x28/0x40
[1191992.900439] [<ffffffff816903f3>] netlink_unicast+0xf3/0x200
[1191992.900441] [<ffffffff81690815>] netlink_sendmsg+0x315/0x680
[1191992.900448] [<ffffffff81333d7d>] ? aa_sk_perm.isra.4+0x6d/0x150
[1191992.900452] [<ffffffff8164625e>] sock_aio_write+0xfe/0x130
[1191992.900456] [<ffffffff811d358a>] do_sync_write+0x5a/0x90
[1191992.900458] [<ffffffff811d4005>] vfs_write+0x195/0x1f0
[1191992.900461] [<ffffffff811d4ac6>] SyS_write+0x46/0xb0
[1191992.900464] [<ffffffff8176b66d>] system_call_fastpath+0x1a/0x1f
[1191992.900465] sending NMI to all CPUs:

Dump at:
http://telsasoft.com/tmp/varcrash-201503271156.tar.bz2

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1439872

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]