Public bug reported:
successfully wiped device /dev/md0 on attempt 1/4
shutdown running on holder type: 'bcache' syspath: '/sys/class/block/bcache0'
stopping bcache cacheset at: /sys/fs/bcache/7834b3df-d029-49a3-9c1b-3fd628db10f2
waiting for /sys/fs/bcache/7834b3df-d029-49a3-9c1b-3fd628db10f2 to be removed
/sys/fs/bcache/7834b3df-d029-49a3-9c1b-3fd628db10f2 has been removed
[ 70.788038] BUG: unable to handle kernel NULL pointer dereference at
0000000000000a00
[ 70.789098] IP: [<ffffffffa0272440>] journal_write_unlocked+0x130/0x570
[bcache]
[ 70.790167] PGD 800000000dfa0067 PUD dfb2067 PMD 0
[ 70.790831] Oops: 0000 [#1] SMP
[ 70.791314] Modules linked in: bcache ib_iser rdma_cm iw_cm ib_cm ib_sa
ib_mad ib_core ib_addr dm_crypt kvm_intel kvm ppdev serio_raw parport_pc
parport mac_hid i2c_piix4 overlayfs squashfs iscsi_ibft iscsi_boot_sysfs
iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi raid10 raid456
async_memcpy async_raid6_recov async_pq async_xor async_tx xor raid6_pq raid1
raid0 multipath linear psmouse virtio_scsi floppy pata_acpi
[ 70.792016] CPU: 0 PID: 10996 Comm: kworker/0:3 Not tainted
3.13.0-142-generic #191-Ubuntu
[ 70.792016] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.10.2-1ubuntu1 04/01/2014
[ 70.792016] Workqueue: events journal_write_work [bcache]
[ 70.792016] task: ffff88000df76000 ti: ffff88003a14c000 task.ti:
ffff88003a14c000
[ 70.792016] RIP: 0010:[<ffffffffa0272440>] [<ffffffffa0272440>]
journal_write_unlocked+0x130/0x570 [bcache]
[ 70.792016] RSP: 0000:ffff88003a14dd88 EFLAGS: 00010202
[ 70.792016] RAX: 0000000000000000 RBX: ffff88003bf4cba0 RCX: 0000000000000000
[ 70.792016] RDX: ffff88003bf40c48 RSI: ffff88003bf4cad8 RDI: ffff88003bec8040
[ 70.792016] RBP: ffff88003a14dde0 R08: 2000efd32f400000 R09: 5e80000000000000
[ 70.792016] R10: dffe982d0cb4cbd0 R11: 0000000000000005 R12: 0000000000000031
[ 70.792016] R13: ffff88003bf4ccc8 R14: 0000000000000001 R15: ffff88003bf40000
[ 70.792016] FS: 0000000000000000(0000) GS:ffff88003e200000(0000)
knlGS:0000000000000000
[ 70.792016] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 70.792016] CR2: 0000000000000a00 CR3: 000000003a1ae000 CR4: 0000000000000670
[ 70.792016] Stack:
[ 70.792016] ffff88003a14ddb0 ffff88003bf40000 ffff88003a14dde8
ffffffff81013558
[ 70.792016] 000000000df71868 ffff88000df764e8 ffff88003bf40000
ffff88003bf4cba0
[ 70.792016] ffff88003e217300 0000000000000000 ffff88003bf4cbd0
ffff88003a14de00
[ 70.792016] Call Trace:
[ 70.792016] [<ffffffff81013558>] ? __switch_to+0xe8/0x4f0
[ 70.792016] [<ffffffffa02728d0>] journal_try_write+0x50/0x60 [bcache]
[ 70.792016] [<ffffffffa0272902>] journal_write_work+0x22/0x30 [bcache]
[ 70.792016] [<ffffffff81087cb8>] process_one_work+0x178/0x470
[ 70.792016] [<ffffffff81088ad1>] worker_thread+0x121/0x410
[ 70.792016] [<ffffffff810889b0>] ? rescuer_thread+0x430/0x430
[ 70.792016] [<ffffffff8108f8b9>] kthread+0xc9/0xe0
[ 70.792016] [<ffffffff8108f7f0>] ? kthread_create_on_node+0x1c0/0x1c0
[ 70.792016] [<ffffffff8173f6a8>] ret_from_fork+0x58/0x90
[ 70.792016] [<ffffffff8108f7f0>] ? kthread_create_on_node+0x1c0/0x1c0
[ 70.792016] Code: 10 00 00 00 e8 a2 7a 10 e1 31 c0 66 83 bb 94 38 ff ff 00
48 8b 8b a0 40 ff ff 49 8d 97 48 0c 00 00 74 3b 0f 1f 84 00 00 00 00 00 <48> 8b
b9 00 0a 00 00 0f b7 89 ce 00 00 00 83 c0 01 49 8b 75 00
[ 70.792016] RIP [<ffffffffa0272440>] journal_write_unlocked+0x130/0x570
[bcache]
[ 70.792016] RSP <ffff88003a14dd88>
[ 70.792016] CR2: 0000000000000a00
[ 70.792016] ---[ end trace c5387a4b27c41667 ]---
Running command ['udevadm', 'settle'] with allowed return codes [0]
(capture=False)
[ 70.831831] BUG: unable to handle kernel paging request at ffffffffffffffd8
[ 70.832822] IP: [<ffffffff8108ff90>] kthread_data+0x10/0x20
[ 70.833396] PGD 1c13067 PUD 1c15067 PMD 0
[ 70.833396] Oops: 0000 [#2] SMP
[ 70.833396] Modules linked in: bcache ib_iser rdma_cm iw_cm ib_cm ib_sa
ib_mad ib_core ib_addr dm_crypt kvm_intel kvm ppdev serio_raw parport_pc
parport mac_hid i2c_piix4 overlayfs squashfs iscsi_ibft iscsi_boot_sysfs
iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi raid10 raid456
async_memcpy async_raid6_recov async_pq async_xor async_tx xor raid6_pq raid1
raid0 multipath linear psmouse virtio_scsi floppy pata_acpi
[ 70.833396] CPU: 0 PID: 10996 Comm: kworker/0:3 Tainted: G D
3.13.0-142-generic #191-Ubuntu
[ 70.833396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.10.2-1ubuntu1 04/01/2014
[ 70.833396] task: ffff88000df76000 ti: ffff88003a14c000 task.ti:
ffff88003a14c000
[ 70.833396] RIP: 0010:[<ffffffff8108ff90>] [<ffffffff8108ff90>]
kthread_data+0x10/0x20
[ 70.833396] RSP: 0018:ffff88003a14d9c0 EFLAGS: 00010002
[ 70.833396] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000000f
[ 70.833396] RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff88000df76000
[ 70.833396] RBP: ffff88003a14d9c0 R08: 0000000000000000 R09: ffff88003e216f20
[ 70.833396] R10: ffffffff8106887c R11: ffffea0000357200 R12: ffff88003e213b00
[ 70.833396] R13: 0000000000000000 R14: ffff88000df75ff0 R15: ffff88000df76000
[ 70.833396] FS: 0000000000000000(0000) GS:ffff88003e200000(0000)
knlGS:0000000000000000
[ 70.833396] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 70.833396] CR2: 0000000000000028 CR3: 00000000384d0000 CR4: 0000000000000670
[ 70.833396] Stack:
[ 70.833396] ffff88003a14d9d8 ffffffff81089291 ffff88000df76000
ffff88003a14da38
[ 70.833396] ffffffff817329b9 ffff88000df76000 0000000000013b00
ffff88003a14dfd8
[ 70.833396] 0000000000013b00 ffff88000df76000 ffff88000df76650
ffff88000df75ff0
[ 70.833396] Call Trace:
[ 70.833396] [<ffffffff81089291>] wq_worker_sleeping+0x11/0x90
[ 70.833396] [<ffffffff817329b9>] __schedule+0x539/0x730
[ 70.833396] [<ffffffff81732bd9>] schedule+0x29/0x70
[ 70.833396] [<ffffffff8106d95f>] do_exit+0x6cf/0xa60
[ 70.833396] [<ffffffff817381c9>] oops_end+0xa9/0x150
[ 70.833396] [<ffffffff81727106>] no_context+0x27e/0x28b
[ 70.833396] [<ffffffff81727186>] __bad_area_nosemaphore+0x73/0x1ca
[ 70.833396] [<ffffffff817272f0>] bad_area_nosemaphore+0x13/0x15
[ 70.833396] [<ffffffff8173ac67>] __do_page_fault+0xa7/0x560
[ 70.833396] [<ffffffff810a861c>] ? check_preempt_wakeup+0x17c/0x270
[ 70.833396] [<ffffffff8173757a>] ? error_entry+0x12a/0x179
[ 70.833396] [<ffffffff81737573>] ? error_entry+0x123/0x179
[ 70.833396] [<ffffffff8173756c>] ? error_entry+0x11c/0x179
[ 70.833396] [<ffffffff81737565>] ? error_entry+0x115/0x179
[ 70.833396] [<ffffffff8173755e>] ? error_entry+0x10e/0x179
[ 70.833396] [<ffffffff81737557>] ? error_entry+0x107/0x179
[ 70.833396] [<ffffffff81737550>] ? error_entry+0x100/0x179
[ 70.833396] [<ffffffff81737549>] ? error_entry+0xf9/0x179
[ 70.833396] [<ffffffff81737542>] ? error_entry+0xf2/0x179
[ 70.833396] [<ffffffff8173753b>] ? error_entry+0xeb/0x179
[ 70.833396] [<ffffffff81737534>] ? error_entry+0xe4/0x179
[ 70.833396] [<ffffffff8173752d>] ? error_entry+0xdd/0x179
[ 70.833396] [<ffffffff81737526>] ? error_entry+0xd6/0x179
[ 70.833396] [<ffffffff8173751f>] ? error_entry+0xcf/0x179
[ 70.833396] [<ffffffff81737518>] ? error_entry+0xc8/0x179
[ 70.833396] [<ffffffff81737511>] ? error_entry+0xc1/0x179
[ 70.833396] [<ffffffff8173750a>] ? error_entry+0xba/0x179
[ 70.833396] [<ffffffff81737503>] ? error_entry+0xb3/0x179
[ 70.833396] [<ffffffff8173b13a>] do_page_fault+0x1a/0x70
[ 70.833396] [<ffffffff817374cb>] ? error_entry+0x7b/0x179
[ 70.833396] [<ffffffff817374c4>] ? error_entry+0x74/0x179
[ 70.833396] [<ffffffff8173a7c9>] do_async_page_fault+0x29/0xe0
[ 70.833396] [<ffffffff817372e8>] async_page_fault+0x28/0x30
[ 70.833396] [<ffffffffa0272440>] ? journal_write_unlocked+0x130/0x570
[bcache]
[ 70.833396] [<ffffffffa027241e>] ? journal_write_unlocked+0x10e/0x570
[bcache]
[ 70.833396] [<ffffffff81013558>] ? __switch_to+0xe8/0x4f0
[ 70.833396] [<ffffffffa02728d0>] journal_try_write+0x50/0x60 [bcache]
[ 70.833396] [<ffffffffa0272902>] journal_write_work+0x22/0x30 [bcache]
[ 70.833396] [<ffffffff81087cb8>] process_one_work+0x178/0x470
[ 70.833396] [<ffffffff81088ad1>] worker_thread+0x121/0x410
[ 70.833396] [<ffffffff810889b0>] ? rescuer_thread+0x430/0x430
[ 70.833396] [<ffffffff8108f8b9>] kthread+0xc9/0xe0
[ 70.833396] [<ffffffff8108f7f0>] ? kthread_create_on_node+0x1c0/0x1c0
[ 70.833396] [<ffffffff8173f6a8>] ret_from_fork+0x58/0x90
[ 70.833396] [<ffffffff8108f7f0>] ? kthread_create_on_node+0x1c0/0x1c0
[ 70.833396] Code: 00 48 89 e5 5d 48 8b 40 c8 48 c1 e8 02 83 e0 01 c3 66 2e
0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 8b 87 c0 03 00 00 48 89 e5 <48> 8b
40 d8 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00
[ 70.833396] RIP [<ffffffff8108ff90>] kthread_data+0x10/0x20
[ 70.833396] RSP <ffff88003a14d9c0>
[ 70.833396] CR2: ffffffffffffffd8
[ 70.833396] ---[ end trace c5387a4b27c41668 ]---
[ 70.833396] Fixing recursive fault but reboot is needed!
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Tags: curtin
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Tags added: curtin
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https://bugs.launchpad.net/bugs/1754581
Title:
trusty bcache NULL pointer exception
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