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CoW Crash

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Oct 23rd, 2016
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  1. [94742.652316] ------------[ cut here ]------------
  2. [94742.653335] kernel BUG at /build/linux-zODV55/linux-3.13.0/fs/ext4/inode.c:2448!
  3. [94742.654461] invalid opcode: 0000 [#1] SMP
  4. [94742.655196] Modules linked in: dm_crypt kvm_intel kvm serio_raw virtio_scsi psmouse floppy
  5. [94742.656044] CPU: 0 PID: 55 Comm: kworker/u4:1 Not tainted 3.13.0-86-generic #131-Ubuntu
  6. [94742.656044] Hardware name: OpenStack Foundation OpenStack Nova, BIOS Bochs 01/01/2011
  7. [94742.656044] Workqueue: writeback bdi_writeback_workfn (flush-8:0)
  8. [94742.656044] task: ffff88007ab1e000 ti: ffff88007ab28000 task.ti: ffff88007ab28000
  9. [94742.656044] RIP: 0010:[<ffffffff81244818>] [<ffffffff81244818>] mpage_prepare_extent_to_map+0x2b8/0x2c0
  10. [94742.656044] RSP: 0018:ffff88007ab299b8 EFLAGS: 00010246
  11. [94742.656044] RAX: 01ffff000002007d RBX: ffff88007ab299f8 RCX: 0000000000000000
  12. [94742.656044] RDX: ffff88007ab299f8 RSI: 0000000000000000 RDI: ffff88007b28a0c8
  13. [94742.656044] RBP: ffff88007ab29a88 R08: 0000000000000000 R09: 0000000000000000
  14. [94742.656044] R10: 0000000000000100 R11: 0000000000000210 R12: 0000000000003400
  15. [94742.656044] R13: ffffffffffffffff R14: ffffea0001e5f3c0 R15: ffff88007ab29b38
  16. [94742.656044] FS: 0000000000000000(0000) GS:ffff88007fc00000(0000) knlGS:0000000000000000
  17. [94742.656044] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  18. [94742.656044] CR2: 00007f137e94c410 CR3: 0000000037648000 CR4: 00000000000006f0
  19. [94742.656044] Stack:
  20. [94742.656044] ffff88007ab299f8 0000000000000000 ffff88007b28a0c0 ffff88007ab299f8
  21. [94742.656044] 0000000000000001 0000000000000001 0000000000000000 ffffea0001e5f3c0
  22. [94742.656044] ffff88007bc78150 ffff88007ab29a48 ffffffff8128cf31 ffff880000000050
  23. [94742.656044] Call Trace:
  24. [94742.656044] [<ffffffff8128cf31>] ? jbd2__journal_start+0xf1/0x200
  25. [94742.656044] [<ffffffff81248b5a>] ? ext4_writepages+0x40a/0xdb0
  26. [94742.656044] [<ffffffff8127358d>] ? __ext4_journal_start_sb+0x6d/0x100
  27. [94742.656044] [<ffffffff81248b86>] ext4_writepages+0x436/0xdb0
  28. [94742.656044] [<ffffffff8115e7ae>] do_writepages+0x1e/0x40
  29. [94742.656044] [<ffffffff811eb1a0>] __writeback_single_inode+0x40/0x2a0
  30. [94742.656044] [<ffffffff811ec08a>] writeback_sb_inodes+0x26a/0x440
  31. [94742.656044] [<ffffffff811ec2ff>] __writeback_inodes_wb+0x9f/0xd0
  32. [94742.656044] [<ffffffff811ec5b3>] wb_writeback+0x283/0x320
  33. [94742.656044] [<ffffffff811edf09>] bdi_writeback_workfn+0x1e9/0x4a0
  34. [94742.656044] [<ffffffff81086288>] process_one_work+0x178/0x470
  35. [94742.656044] [<ffffffff810870a1>] worker_thread+0x121/0x410
  36. [94742.656044] [<ffffffff81086f80>] ? rescuer_thread+0x430/0x430
  37. [94742.656044] [<ffffffff8108de92>] kthread+0xd2/0xf0
  38. [94742.656044] [<ffffffff8108ddc0>] ? kthread_create_on_node+0x1c0/0x1c0
  39. [94742.656044] [<ffffffff8173af68>] ret_from_fork+0x58/0x90
  40. [94742.656044] [<ffffffff8108ddc0>] ? kthread_create_on_node+0x1c0/0x1c0
  41. [94742.656044] Code: 00 00 00 48 8d bd 58 ff ff ff 89 85 48 ff ff ff e8 6e c5 f1 ff 8b 85 48 ff ff ff eb ca 48 8d bd 58 ff ff ff e8 5a c5 f1 ff eb 80 <0f> 0b 0f 0b 0f 1f 40 00 66 66 66 66 90 85 c9 0f 84 d6 05 00 00
  42. [94742.656044] RIP [<ffffffff81244818>] mpage_prepare_extent_to_map+0x2b8/0x2c0
  43. [94742.656044] RSP <ffff88007ab299b8>
  44. [94742.704391] ---[ end trace cd30dbd4915e3b96 ]---
  45. [94742.705444] BUG: unable to handle kernel paging request at ffffffffffffffd8
  46. [94742.706958] IP: [<ffffffff8108e570>] kthread_data+0x10/0x20
  47. [94742.708119] PGD 1c11067 PUD 1c13067 PMD 0
  48. [94742.708359] Oops: 0000 [#2] SMP
  49. [94742.708359] Modules linked in: dm_crypt kvm_intel kvm serio_raw virtio_scsi psmouse floppy
  50. [94742.708359] CPU: 0 PID: 55 Comm: kworker/u4:1 Tainted: G D 3.13.0-86-generic #131-Ubuntu
  51. [94742.708359] Hardware name: OpenStack Foundation OpenStack Nova, BIOS Bochs 01/01/2011
  52. [94742.708359] task: ffff88007ab1e000 ti: ffff88007ab28000 task.ti: ffff88007ab28000
  53. [94742.708359] RIP: 0010:[<ffffffff8108e570>] [<ffffffff8108e570>] kthread_data+0x10/0x20
  54. [94742.708359] RSP: 0018:ffff88007ab296a8 EFLAGS: 00010002
  55. [94742.708359] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000000a
  56. [94742.708359] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88007ab1e000
  57. [94742.708359] RBP: ffff88007ab296a8 R08: 0000000000000000 R09: ffff88007fc172d0
  58. [94742.708359] R10: ffffffff813458ca R11: ffffea0000dc1b80 R12: ffff88007fc13180
  59. [94742.708359] R13: 0000000000000000 R14: ffff88007ab1dff0 R15: ffff88007ab1e000
  60. [94742.708359] FS: 0000000000000000(0000) GS:ffff88007fc00000(0000) knlGS:0000000000000000
  61. [94742.708359] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  62. [94742.708359] CR2: 0000000000000028 CR3: 0000000037648000 CR4: 00000000000006f0
  63. [94742.708359] Stack:
  64. [94742.708359] ffff88007ab296c0 ffffffff81087861 ffff88007ab1e000 ffff88007ab29720
  65. [94742.708359] ffffffff8172e5e9 ffff88007ab1e000 ffff88007ab29fd8 0000000000013180
  66. [94742.708359] 0000000000013180 ffff88007ab1e000 ffff88007ab1e650 ffff88007ab1dff0
  67. [94742.708359] Call Trace:
  68. [94742.708359] [<ffffffff81087861>] wq_worker_sleeping+0x11/0x90
  69. [94742.708359] [<ffffffff8172e5e9>] __schedule+0x5a9/0x7f0
  70. [94742.708359] [<ffffffff8172e859>] schedule+0x29/0x70
  71. [94742.708359] [<ffffffff8106c38f>] do_exit+0x6df/0xa70
  72. [94742.708359] [<ffffffff81733a09>] oops_end+0xa9/0x150
  73. [94742.708359] [<ffffffff8101837b>] die+0x4b/0x70
  74. [94742.708359] [<ffffffff81733170>] do_trap+0x60/0x170
  75. [94742.708359] [<ffffffff810155d2>] do_invalid_op+0xa2/0x100
  76. [94742.708359] [<ffffffff81244818>] ? mpage_prepare_extent_to_map+0x2b8/0x2c0
  77. [94742.708359] [<ffffffff8173c81e>] invalid_op+0x1e/0x30
  78. [94742.708359] [<ffffffff81244818>] ? mpage_prepare_extent_to_map+0x2b8/0x2c0
  79. [94742.708359] [<ffffffff812446ea>] ? mpage_prepare_extent_to_map+0x18a/0x2c0
  80. [94742.708359] [<ffffffff8128cf31>] ? jbd2__journal_start+0xf1/0x200
  81. [94742.708359] [<ffffffff81248b5a>] ? ext4_writepages+0x40a/0xdb0
  82. [94742.708359] [<ffffffff8127358d>] ? __ext4_journal_start_sb+0x6d/0x100
  83. [94742.708359] [<ffffffff81248b86>] ext4_writepages+0x436/0xdb0
  84. [94742.708359] [<ffffffff8115e7ae>] do_writepages+0x1e/0x40
  85. [94742.708359] [<ffffffff811eb1a0>] __writeback_single_inode+0x40/0x2a0
  86. [94742.708359] [<ffffffff811ec08a>] writeback_sb_inodes+0x26a/0x440
  87. [94742.708359] [<ffffffff811ec2ff>] __writeback_inodes_wb+0x9f/0xd0
  88. [94742.708359] [<ffffffff811ec5b3>] wb_writeback+0x283/0x320
  89. [94742.708359] [<ffffffff811edf09>] bdi_writeback_workfn+0x1e9/0x4a0
  90. [94742.708359] [<ffffffff81086288>] process_one_work+0x178/0x470
  91. [94742.708359] [<ffffffff810870a1>] worker_thread+0x121/0x410
  92. [94742.708359] [<ffffffff81086f80>] ? rescuer_thread+0x430/0x430
  93. [94742.708359] [<ffffffff8108de92>] kthread+0xd2/0xf0
  94. [94742.708359] [<ffffffff8108ddc0>] ? kthread_create_on_node+0x1c0/0x1c0
  95. [94742.708359] [<ffffffff8173af68>] ret_from_fork+0x58/0x90
  96. [94742.708359] [<ffffffff8108ddc0>] ? kthread_create_on_node+0x1c0/0x1c0
  97. [94742.708359] 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 66 66 66 66 90 48 8b 87 c0 03 00 00 55 48 89 e5 <48> 8b 40 d8 5d c3 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90
  98. [94742.708359] RIP [<ffffffff8108e570>] kthread_data+0x10/0x20
  99. [94742.708359] RSP <ffff88007ab296a8>
  100. [94742.708359] CR2: ffffffffffffffd8
  101. [94742.708359] ---[ end trace cd30dbd4915e3b97 ]---
  102. [94742.708359] Fixing recursive fault but reboot is needed!
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