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SubjectRe: 3.11.4: kernel BUG at fs/buffer.c:1268
Sorry for the long delay between updates, but it took a while to
re-trigger the bug. It seems to be caused by iceweasel crashing due to
some OOM condition.

Anyway, here's the stack dump with CONFIG_DEBUG_ATOMIC_SLEEP enabled.
(x = 1166866 seconds of uptime.)

[x.908244] BUG: sleeping function called from invalid context at fs/ext4/ext4_jbd2.c:45
[x.908248] in_atomic(): 0, irqs_disabled(): 1, pid: 15216, name: iceweasel
[x.908250] CPU: 6 PID: 15216 Comm: iceweasel Not tainted 3.11.5-00008-ga1818c5 #99
[x.908252] Hardware name: Gigabyte Technology Co., Ltd. Z68A-D3H-B3/Z68A-D3H-B3, BIOS F13 03/20/2012
[x.908253] 0000000000000002 ffff88010d249908 ffffffff81561d7f ffff88021549a000
[x.908255] ffff88010d249918 ffffffff81069d2f ffff88010d249930 ffffffff8119079b
[x.908257] ffff88021549a000 ffff88010d249968 ffffffff81190871 ffff8800cc7b8c20
[x.908259] Call Trace:
[x.908265] [<ffffffff81561d7f>] dump_stack+0x54/0x74
[x.908268] [<ffffffff81069d2f>] __might_sleep+0xcf/0xf0
[x.908271] [<ffffffff8119079b>] ext4_journal_check_start+0x1b/0xa0
[x.908273] [<ffffffff81190871>] __ext4_journal_start_sb+0x21/0x80
[x.908276] [<ffffffff81177795>] ext4_dirty_inode+0x25/0x60
[x.908280] [<ffffffff811296ed>] __mark_inode_dirty+0x2d/0x230
[x.908283] [<ffffffff811992bc>] ext4_free_blocks+0x73c/0xa30
[x.908285] [<ffffffff8118d936>] ext4_ext_remove_space+0x806/0xe20
[x.908287] [<ffffffff8119fb14>] ? ext4_es_free_extent+0x54/0x60
[x.908289] [<ffffffff8118fc18>] ext4_ext_truncate+0xb8/0xe0
[x.908291] [<ffffffff81176065>] ext4_truncate+0x2b5/0x300
[x.908292] [<ffffffff81176b18>] ext4_evict_inode+0x3f8/0x430
[x.908295] [<ffffffff8111c69a>] evict+0xba/0x1c0
[x.908297] [<ffffffff8111d04b>] iput+0x10b/0x1b0
[x.908298] [<ffffffff81118e38>] dput+0x278/0x350
[x.908301] [<ffffffff81104d0a>] __fput+0x16a/0x240
[x.908303] [<ffffffff81104e19>] ____fput+0x9/0x10
[x.908306] [<ffffffff8105e30c>] task_work_run+0x9c/0xd0
[x.908309] [<ffffffff810451f7>] do_exit+0x2a7/0x9d0
[x.908311] [<ffffffff8104f8ce>] ? __sigqueue_free.part.13+0x2e/0x40
[x.908312] [<ffffffff8104679e>] do_group_exit+0x3e/0xb0
[x.908315] [<ffffffff81052740>] get_signal_to_deliver+0x1b0/0x5f0
[x.908317] [<ffffffff81002133>] do_signal+0x43/0x940
[x.908319] [<ffffffff81051698>] ? do_send_sig_info+0x58/0x80
[x.908320] [<ffffffff81002a8d>] do_notify_resume+0x5d/0x80
[x.908323] [<ffffffff81569ca0>] int_signal+0x12/0x17
[x.908329] ------------[ cut here ]------------
[x.908352] kernel BUG at fs/buffer.c:1268!
[x.908370] invalid opcode: 0000 [#1] SMP
[x.908391] Modules linked in: pl2303 fuse ftdi_sio usbserial iTCO_wdt
[x.908425] CPU: 6 PID: 15216 Comm: iceweasel Not tainted 3.11.5-00008-ga1818c5 #99
[x.908460] Hardware name: Gigabyte Technology Co., Ltd. Z68A-D3H-B3/Z68A-D3H-B3, BIOS F13 03/20/2012
[x.908484] task: ffff8801124ae800 ti: ffff88010d248000 task.ti: ffff88010d248000
[x.908504] RIP: 0010:[<ffffffff815612a6>] [<ffffffff815612a6>] check_irqs_on.part.19+0x4/0x6
[x.908529] RSP: 0018:ffff88010d249798 EFLAGS: 00210046
[x.908543] RAX: 0000000000200082 RBX: ffff88010d249928 RCX: ffff880215a5c000
[x.908562] RDX: 0000000000001000 RSI: 000000000038005b RDI: ffff8802164296c0
[x.908580] RBP: ffff88010d249798 R08: 0000000000000000 R09: 0000000000000000
[x.908599] R10: ffff880215a5c000 R11: ffff88010d24947e R12: ffff8802164296c0
[x.908617] R13: 0000000000001000 R14: ffff88021fbdbe00 R15: ffff88021549a000
[x.908635] FS: 0000000000000000(0000) GS:ffff88021fb80000(0000) knlGS:0000000000000000
[x.908656] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
[x.908672] CR2: 0000000000000000 CR3: 000000000180c000 CR4: 00000000000407e0
[x.908690] Stack:
[x.908696] ffff88010d249808 ffffffff8112feb7 000000000000b760 ffff88010d2498f0
[x.908720] ffff88021fb83fc0 ffff88010d2498e8 ffff88010d249840 ffffffff81004b7f
[x.908743] ffff88010d24980c 000000000d2498f0 ffff88010d249928 ffff8802164296c0
[x.908766] Call Trace:
[x.908776] [<ffffffff8112feb7>] __find_get_block+0x1d7/0x1e0
[x.908793] [<ffffffff81004b7f>] ? dump_trace+0x17f/0x2d0
[x.908808] [<ffffffff8112fee0>] __getblk+0x20/0x2f0
[x.908823] [<ffffffff81171516>] __ext4_get_inode_loc+0x106/0x410
[x.908840] [<ffffffff81004d7f>] ? show_stack_log_lvl+0xaf/0x1a0
[x.908857] [<ffffffff811734b8>] ext4_get_inode_loc+0x18/0x20
[x.908874] [<ffffffff81174c61>] ext4_reserve_inode_write+0x21/0x90
[x.908891] [<ffffffff81561d7f>] ? dump_stack+0x54/0x74
[x.908906] [<ffffffff81174d19>] ext4_mark_inode_dirty+0x49/0x1a0
[x.908924] [<ffffffff811777ab>] ext4_dirty_inode+0x3b/0x60
[x.908940] [<ffffffff811296ed>] __mark_inode_dirty+0x2d/0x230
[x.908957] [<ffffffff811992bc>] ext4_free_blocks+0x73c/0xa30
[x.908974] [<ffffffff8118d936>] ext4_ext_remove_space+0x806/0xe20
[x.908991] [<ffffffff8119fb14>] ? ext4_es_free_extent+0x54/0x60
[x.909008] [<ffffffff8118fc18>] ext4_ext_truncate+0xb8/0xe0
[x.909025] [<ffffffff81176065>] ext4_truncate+0x2b5/0x300
[x.909041] [<ffffffff81176b18>] ext4_evict_inode+0x3f8/0x430
[x.909057] [<ffffffff8111c69a>] evict+0xba/0x1c0
[x.909071] [<ffffffff8111d04b>] iput+0x10b/0x1b0
[x.909084] [<ffffffff81118e38>] dput+0x278/0x350
[x.909099] [<ffffffff81104d0a>] __fput+0x16a/0x240
[x.909113] [<ffffffff81104e19>] ____fput+0x9/0x10
[x.909127] [<ffffffff8105e30c>] task_work_run+0x9c/0xd0
[x.909143] [<ffffffff810451f7>] do_exit+0x2a7/0x9d0
[x.909157] [<ffffffff8104f8ce>] ? __sigqueue_free.part.13+0x2e/0x40
[x.909175] [<ffffffff8104679e>] do_group_exit+0x3e/0xb0
[x.909190] [<ffffffff81052740>] get_signal_to_deliver+0x1b0/0x5f0
[x.909207] [<ffffffff81002133>] do_signal+0x43/0x940
[x.909222] [<ffffffff81051698>] ? do_send_sig_info+0x58/0x80
[x.909238] [<ffffffff81002a8d>] do_notify_resume+0x5d/0x80
[x.909254] [<ffffffff81569ca0>] int_signal+0x12/0x17
[x.909267] Code: 4d 85 e4 74 1d 41 80 44 24 58 01 65 48 8b 04 25 b0 b7 00 00 ff 88 44 e0 ff ff 4c 89 e7 e8 23 79 bb ff 5b 41 5c 5d c3 55 48 89 e5 <0f> 0b 55 48 89 e5 0f 0b 55 48 89 e5 0f 0b 55 48 89 e5 0f 0b 55
[x.909390] RIP [<ffffffff815612a6>] check_irqs_on.part.19+0x4/0x6
[x.909408] RSP <ffff88010d249798>
[x.915643] ---[ end trace 379d96cb0444fcb3 ]---
[x.915645] Fixing recursive fault but reboot is needed!


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