os-prober(8) が OCFS2 のバグ踏んだっぽい

OCFS2パーティション (sdc1) を含むiSCSIブロックデバイス (sdc) をudevが認識した後に update-grub(8) すると ocfs2_stack_o2cb.ko 内でSEGVってbeep音が鳴りコンソールにメッセージが出て,その後マシンがフリーズしたりしなかったり.即座にフリーズしないときもshutdown時にまともに umount(8) が進まないっぽいのでかなり致命的.
どうも os-prober(8) がなんかやるのとOCFS2の相性が悪いっぽい. (追記:どうも Lun 0 Path=/dev/sdb8,Type=blockio に指定した /dev/sdb8 を最初に良く理解せずに OCFS2 フォーマットしたせいで混乱が生じた気がする.これは普通のSATA HDDで言うと /dev/sdaファイルシステムにフォーマットするという変なことに相当するので... os-prober(8) は可能な全てのファイルシステムでマウントを試すスクリプト.しかしどうやって「フォーマット済み」の印を消せばいいんだ?) /var/log/syslog に残されていたダイニング・メッセージ:

Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/sda1
Dec  3 15:06:22 zbox 10freedos: debug: /dev/sda1 is not a FAT partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/sda1
Dec  3 15:06:22 zbox 10qnx: debug: /dev/sda1 is not a QNX4 partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/sda1
Dec  3 15:06:22 zbox macosx-prober: debug: /dev/sda1 is not an HFS+ partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/sda1
Dec  3 15:06:22 zbox 20microsoft: debug: /dev/sda1 is not a MS partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/sda1
Dec  3 15:06:22 zbox 30utility: debug: /dev/sda1 is not a FAT partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/sda1
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/70hurd on mounted /dev/sda1
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/80minix on mounted /dev/sda1
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/83haiku on mounted /dev/sda1
Dec  3 15:06:22 zbox 83haiku: debug: /dev/sda1 is not a BeFS partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90linux-distro on mounted /dev/sda1
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90solaris on mounted /dev/sda1
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sda2
Dec  3 15:06:22 zbox 50mounted-tests: debug: /dev/sda2 type not recognised; skipping
Dec  3 15:06:22 zbox os-prober: debug: os detected by /usr/lib/os-probes/50mounted-tests
Dec  3 15:06:22 zbox os-prober: debug: /dev/sda5: is active swap
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/sda7
Dec  3 15:06:22 zbox 10freedos: debug: /dev/sda7 is not a FAT partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/sda7
Dec  3 15:06:22 zbox 10qnx: debug: /dev/sda7 is not a QNX4 partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/sda7
Dec  3 15:06:22 zbox macosx-prober: debug: /dev/sda7 is not an HFS+ partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/sda7
Dec  3 15:06:22 zbox 20microsoft: debug: /dev/sda7 is not a MS partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/sda7
Dec  3 15:06:22 zbox 30utility: debug: /dev/sda7 is not a FAT partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/sda7
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/70hurd on mounted /dev/sda7
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/80minix on mounted /dev/sda7
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/83haiku on mounted /dev/sda7
Dec  3 15:06:22 zbox 83haiku: debug: /dev/sda7 is not a BeFS partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90linux-distro on mounted /dev/sda7
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90solaris on mounted /dev/sda7
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/sdb1
Dec  3 15:06:22 zbox 10freedos: debug: /dev/sdb1 is a FUSE partition
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/sdb1
Dec  3 15:06:22 zbox 10qnx: debug: /dev/sdb1 is not a QNX4 partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/sdb1
Dec  3 15:06:22 zbox macosx-prober: debug: /dev/sdb1 is a FUSE partition
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/sdb1
Dec  3 15:06:22 zbox 20microsoft: debug: /dev/sdb1 is a FUSE partition
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/sdb1
Dec  3 15:06:22 zbox 30utility: debug: /dev/sdb1 is a FUSE partition
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/sdb1
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/70hurd on mounted /dev/sdb1
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/80minix on mounted /dev/sdb1
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/83haiku on mounted /dev/sdb1
Dec  3 15:06:22 zbox 83haiku: debug: /dev/sdb1 is a FUSE partition
Dec  3 15:06:22 zbox 83haiku: debug: Stage 1 bootloader not found: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90linux-distro on mounted /dev/sdb1
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90solaris on mounted /dev/sdb1
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/sdb2
Dec  3 15:06:22 zbox 10freedos: debug: /dev/sdb2 is not a FAT partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/sdb2
Dec  3 15:06:22 zbox 10qnx: debug: /dev/sdb2 is not a QNX4 partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/sdb2
Dec  3 15:06:22 zbox macosx-prober: debug: /dev/sdb2 is not an HFS+ partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/sdb2
Dec  3 15:06:22 zbox 20microsoft: debug: /dev/sdb2 is not a MS partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/sdb2
Dec  3 15:06:22 zbox 30utility: debug: /dev/sdb2 is not a FAT partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/sdb2
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/70hurd on mounted /dev/sdb2
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/80minix on mounted /dev/sdb2
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/83haiku on mounted /dev/sdb2
Dec  3 15:06:22 zbox 83haiku: debug: /dev/sdb2 is not a BeFS partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90linux-distro on mounted /dev/sdb2
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90solaris on mounted /dev/sdb2
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sdb3
Dec  3 15:06:22 zbox 50mounted-tests: debug: /dev/sdb3 type not recognised; skipping
Dec  3 15:06:22 zbox os-prober: debug: os detected by /usr/lib/os-probes/50mounted-tests
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/sdb5
Dec  3 15:06:22 zbox 10freedos: debug: /dev/sdb5 is not a FAT partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/sdb5
Dec  3 15:06:22 zbox 10qnx: debug: /dev/sdb5 is not a QNX4 partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/sdb5
Dec  3 15:06:22 zbox macosx-prober: debug: /dev/sdb5 is not an HFS+ partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/sdb5
Dec  3 15:06:22 zbox 20microsoft: debug: /dev/sdb5 is not a MS partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/sdb5
Dec  3 15:06:22 zbox 30utility: debug: /dev/sdb5 is not a FAT partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/sdb5
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/70hurd on mounted /dev/sdb5
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/80minix on mounted /dev/sdb5
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/83haiku on mounted /dev/sdb5
Dec  3 15:06:22 zbox 83haiku: debug: /dev/sdb5 is not a BeFS partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90linux-distro on mounted /dev/sdb5
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90solaris on mounted /dev/sdb5
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/sdb6
Dec  3 15:06:22 zbox 10freedos: debug: /dev/sdb6 is not a FAT partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/sdb6
Dec  3 15:06:22 zbox 10qnx: debug: /dev/sdb6 is not a QNX4 partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/sdb6
Dec  3 15:06:22 zbox macosx-prober: debug: /dev/sdb6 is not an HFS+ partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/sdb6
Dec  3 15:06:22 zbox 20microsoft: debug: /dev/sdb6 is not a MS partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/sdb6
Dec  3 15:06:22 zbox 30utility: debug: /dev/sdb6 is not a FAT partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/sdb6
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/70hurd on mounted /dev/sdb6
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/80minix on mounted /dev/sdb6
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/83haiku on mounted /dev/sdb6
Dec  3 15:06:22 zbox 83haiku: debug: /dev/sdb6 is not a BeFS partition: exiting
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90linux-distro on mounted /dev/sdb6
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90solaris on mounted /dev/sdb6
Dec  3 15:06:22 zbox os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sdb7
Dec  3 15:06:23 zbox 50mounted-tests: debug: mounted using GRUB
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/10freedos
Dec  3 15:06:23 zbox 10freedos: debug: /dev/sdb7 is a FUSE partition
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/10qnx
Dec  3 15:06:23 zbox 10qnx: debug: /dev/sdb7 is not a QNX4 partition: exiting
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/20macosx
Dec  3 15:06:23 zbox macosx-prober: debug: /dev/sdb7 is a FUSE partition
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/20microsoft
Dec  3 15:06:23 zbox 20microsoft: debug: /dev/sdb7 is a FUSE partition
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/30utility
Dec  3 15:06:23 zbox 30utility: debug: /dev/sdb7 is a FUSE partition
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/40lsb
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/70hurd
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/80minix
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/83haiku
Dec  3 15:06:23 zbox 83haiku: debug: /dev/sdb7 is a FUSE partition
Dec  3 15:06:23 zbox 83haiku: debug: Stage 1 bootloader not found: exiting
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/90linux-distro
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/90solaris
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sdb8
Dec  3 15:06:23 zbox kernel: [40231.542384] Readonly device detected. No cluster services will be utilized for this mount. Recovery will be skipped.
Dec  3 15:06:23 zbox kernel: [40231.542418] ocfs2: Mounting device (8,24) on (node 0, slot -1) with ordered data mode.
Dec  3 15:06:23 zbox 50mounted-tests: debug: mounted as ocfs2 filesystem
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/10freedos
Dec  3 15:06:23 zbox 10freedos: debug: /dev/sdb8 is not a FAT partition: exiting
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/10qnx
Dec  3 15:06:23 zbox 10qnx: debug: /dev/sdb8 is not a QNX4 partition: exiting
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/20macosx
Dec  3 15:06:23 zbox macosx-prober: debug: /dev/sdb8 is not an HFS+ partition: exiting
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/20microsoft
Dec  3 15:06:23 zbox 20microsoft: debug: /dev/sdb8 is not a MS partition: exiting
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/30utility
Dec  3 15:06:23 zbox 30utility: debug: /dev/sdb8 is not a FAT partition: exiting
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/40lsb
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/70hurd
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/80minix
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/83haiku
Dec  3 15:06:23 zbox 83haiku: debug: /dev/sdb8 is not a BeFS partition: exiting
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/90linux-distro
Dec  3 15:06:23 zbox 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/90solaris
Dec  3 15:06:23 zbox kernel: [40231.670616] ------------[ cut here ]------------
Dec  3 15:06:23 zbox kernel: [40231.670629] kernel BUG at /build/buildd-linux-2.6_3.1.1-1-amd64-A9YWBe/linux-2.6-3.1.1/debian/build/source_amd64_none/fs/ocfs2/stackgl
ue.c:161!
Dec  3 15:06:23 zbox kernel: [40231.670637] invalid opcode: 0000 [#1] SMP
Dec  3 15:06:23 zbox kernel: [40231.670645] CPU 2
Dec  3 15:06:23 zbox kernel: [40231.670649] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs ext2 ocfs2 quota_tree iscsi_trgt(O) pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) binfmt_misc ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_tran
sport_iscsi dlm nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue configfs nilfs2 fuse ext3 jbd w83627ehf hwmon_vid coretemp loop nvidia(P) snd_hda_codec_hdmi snd_usb_audio snd_usbmidi_lib snd_seq_midi snd_seq_midi_event snd_rawmidi joydev evdev arc4 pcspkr snd_hda_codec_realtek i2c_i801 psmouse serio_raw snd_seq ath9k snd_seq_device mac80211 ath9k_common ath9k_hw snd_hda_intel ath snd_hda_codec snd_hwdep snd_pcm cfg80211
 i2c_core snd_timer rfkill snd soundcore snd_page_alloc button processor thermal_sys ext4 mbcache jbd2 crc16 btrfs zlib_deflate crc32c libcrc32c raid10 raid456 async_raid6_recov async_pq raid6_pq
Dec  3 15:06:23 zbox kernel: async_xor xor async_memcpy async_tx raid1 raid0 multipath linear md_mod dm_mirror dm_region_hash dm_log dm_mod usbhid hid sg sd_mod crc_t
10dif ata_generic uhci_hcd ata_piix libata ehci_hcd scsi_mod usbcore r8169 mii [last unloaded: scsi_wait_scan]
Dec  3 15:06:23 zbox kernel: [40231.670847]
Dec  3 15:06:23 zbox kernel: [40231.670854] Pid: 29084, comm: umount Tainted: P           O 3.1.0-1-amd64 #1 To Be Filled By O.E.M. To Be Filled By O.E.M./To be filled by O.E.M.
Dec  3 15:06:23 zbox kernel: [40231.670866] RIP: 0010:[<ffffffffa0fe5340>]  [<ffffffffa0fe5340>] ocfs2_stack_driver_put+0x19/0x4a [ocfs2_stackglue]
Dec  3 15:06:23 zbox kernel: [40231.670884] RSP: 0018:ffff88013467bdf8  EFLAGS: 00010246
Dec  3 15:06:23 zbox kernel: [40231.670890] RAX: 0000000000000000 RBX: ffff8801392068c0 RCX: 0000000000000000
Dec  3 15:06:23 zbox kernel: [40231.670896] RDX: 0000000000000014 RSI: 0000000000000296 RDI: ffffffffa0fe7628
Dec  3 15:06:23 zbox kernel: [40231.670901] RBP: ffff88009f704400 R08: 0000000000000000 R09: 0000000000000c2b
Dec  3 15:06:23 zbox kernel: [40231.670907] R10: 0000000000000100 R11: 0000000000000100 R12: 0000000000000000
Dec  3 15:06:23 zbox kernel: [40231.670913] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
Dec  3 15:06:23 zbox kernel: [40231.670920] FS:  00007f610d60f7e0(0000) GS:ffff88013fd00000(0000) knlGS:0000000000000000
Dec  3 15:06:23 zbox kernel: [40231.670926] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Dec  3 15:06:23 zbox kernel: [40231.670931] CR2: 00007f610cd6e690 CR3: 000000013883b000 CR4: 00000000000006e0
Dec  3 15:06:23 zbox kernel: [40231.670937] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Dec  3 15:06:23 zbox kernel: [40231.670943] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Dec  3 15:06:23 zbox kernel: [40231.670950] Process umount (pid: 29084, threadinfo ffff88013467a000, task ffff88008b8163c0)
Dec  3 15:06:23 zbox kernel: [40231.670954] Stack:
Dec  3 15:06:23 zbox kernel: [40231.670958]  0000000000000296 ffffffffa0fe543a ffffffffa0fe7010 ffffffffa0fe622c
Dec  3 15:06:23 zbox kernel: [40231.670971]  ffffffffa0fe622f ffff88008776e380 0000000000000000 ffffffffa0fe6232
Dec  3 15:06:23 zbox kernel: [40231.670982]  ffffffffa0fe6239 0000000000000000 ffff880087fc9000 ffffffffa149124b
Dec  3 15:06:23 zbox kernel: [40231.670993] Call Trace:
Dec  3 15:06:23 zbox kernel: [40231.671007]  [<ffffffffa0fe543a>] ? ocfs2_cluster_hangup+0xc9/0xcf [ocfs2_stackglue]
Dec  3 15:06:23 zbox kernel: [40231.671077]  [<ffffffffa149124b>] ? ocfs2_dismount_volume+0x201/0x2fe [ocfs2]
Dec  3 15:06:23 zbox kernel: [40231.671088]  [<ffffffff810b1722>] ? filemap_write_and_wait+0x24/0x30
Dec  3 15:06:23 zbox kernel: [40231.671100]  [<ffffffff810f53b5>] ? generic_shutdown_super+0x4c/0xb4
Dec  3 15:06:23 zbox kernel: [40231.671109]  [<ffffffff810f543b>] ? kill_block_super+0x1e/0x5f
Dec  3 15:06:23 zbox kernel: [40231.671119]  [<ffffffff810f56de>] ? deactivate_locked_super+0x1b/0x4b
Dec  3 15:06:23 zbox kernel: [40231.671128]  [<ffffffff8110a20a>] ? sys_umount+0x2d5/0x303
Dec  3 15:06:23 zbox kernel: [40231.671137]  [<ffffffff810555b0>] ? set_current_blocked+0x2d/0x43
Dec  3 15:06:23 zbox kernel: [40231.671147]  [<ffffffff813322d2>] ? system_call_fastpath+0x16/0x1b
Dec  3 15:06:23 zbox kernel: [40231.671152] Code: 0b 48 8b 05 13 23 00 00 48 8b 40 08 48 8b 40 18 ff e0 57 48 c7 c7 28 76 fe a0 e8 d2 7f 34 e0 48 8b 05 f5 22 00 00 48 85 c0 75 02 <0f> 0b 8b 50 28 85 d2 75 02 0f 0b ff ca 85 d2 89 50 28 75 14 48
Dec  3 15:06:23 zbox kernel: [40231.671238] RIP  [<ffffffffa0fe5340>] ocfs2_stack_driver_put+0x19/0x4a [ocfs2_stackglue]
Dec  3 15:06:23 zbox kernel: [40231.671251]  RSP <ffff88013467bdf8>
Dec  3 15:06:23 zbox kernel: [40231.671257] ---[ end trace 8b757f128b5156dd ]---
Dec  3 15:06:23 zbox 50mounted-tests: warning: failed to umount /var/lib/os-prober/mount
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/sdc1
Dec  3 15:06:23 zbox 10freedos: debug: /dev/sdc1 is not a FAT partition: exiting
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/sdc1
Dec  3 15:06:23 zbox 10qnx: debug: /dev/sdc1 is not a QNX4 partition: exiting
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/sdc1
Dec  3 15:06:23 zbox macosx-prober: debug: /dev/sdc1 is not an HFS+ partition: exiting
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/sdc1
Dec  3 15:06:23 zbox 20microsoft: debug: /dev/sdc1 is not a MS partition: exiting
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/sdc1
Dec  3 15:06:23 zbox 30utility: debug: /dev/sdc1 is not a FAT partition: exiting
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/sdc1
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/70hurd on mounted /dev/sdc1
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/80minix on mounted /dev/sdc1
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/83haiku on mounted /dev/sdc1
Dec  3 15:06:23 zbox 83haiku: debug: /dev/sdc1 is not a BeFS partition: exiting
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90linux-distro on mounted /dev/sdc1
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/mounted/90solaris on mounted /dev/sdc1
Dec  3 15:06:23 zbox os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sdc2