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[342246.846031] BTRFS info (device loop0): disk space caching is enabled
[342246.862115] ------------[ cut here ]------------
[342246.862500] kernel BUG at fs/btrfs/inode.c:978!
[342246.862861] invalid opcode: 0000 [#1] SMP
[342246.863176] Modules linked in:
[342246.863410] CPU: 2 PID: 14504 Comm: btrfs.exe Tainted: G W 4.6.0-rc5 #130
[342246.864010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.8.2-20150714_191134- 04/01/2014
[342246.864674] task: ffff88006fdf0000 ti: ffff8800702e0000 task.ti: ffff8800702e0000
[342246.865186] RIP: 0010:[<ffffffff8144e9c7>] [<ffffffff8144e9c7>] cow_file_range+0x3f7/0x440
[342246.865770] RSP: 0018:ffff8800702e39e0 EFLAGS: 00010206
[342246.866157] RAX: ffff88006bb23000 RBX: 0000000000000001 RCX: 0000000000010000
[342246.866687] RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000000010000
[342246.867191] RBP: ffff8800702e3a70 R08: 0000000000000000 R09: 0000000000000000
[342246.867682] R10: 000000000000ffff R11: 0000000000010000 R12: ffff8800702e3bc0
[342246.868170] R13: ffff8800702e3b3c R14: 0000000000000000 R15: ffff880075369c10
[342246.868660] FS: 00007f96f5a38700(0000) GS:ffff88007ca00000(0000) knlGS:0000000000000000
[342246.869212] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[342246.869642] CR2: 000000000060f4bf CR3: 000000006fc9f000 CR4: 00000000000006e0
[342246.870146] Stack:
[342246.870295] 0000000000000000 0000000000000001 000000000000ffff ffffea00010c08c0
[342246.870838] ffff8800753698e8 0000000000010000 ffff88006fe0f000 000000000000ffff
[342246.871397] 000000000000ffff ffffffff814683e5 ffff8800753698c8 ffff8800753698e8
[342246.871944] Call Trace:
[342246.872124] [<ffffffff814683e5>] ? test_range_bit+0xe5/0x130
[342246.872522] [<ffffffff8144f906>] run_delalloc_range+0x396/0x3d0
[342246.872975] [<ffffffff8146873f>] writepage_delalloc.isra.42+0x10f/0x170
[342246.873437] [<ffffffff8146a674>] __extent_writepage+0xf4/0x370
[342246.873848] [<ffffffff8146abf4>] extent_write_cache_pages.isra.39.constprop.57+0x304/0x3f0
[342246.874419] [<ffffffff8146beec>] extent_writepages+0x5c/0x90
[342246.874818] [<ffffffff8144c870>] ? btrfs_real_readdir+0x5f0/0x5f0
[342246.875245] [<ffffffff814498f8>] btrfs_writepages+0x28/0x30
[342246.875641] [<ffffffff811ebc61>] do_writepages+0x21/0x30
[342246.876031] [<ffffffff811dc1a6>] __filemap_fdatawrite_range+0xc6/0x100
[342246.876487] [<ffffffff811dc2b3>] filemap_fdatawrite_range+0x13/0x20
[342246.876949] [<ffffffff8145eae0>] btrfs_fdatawrite_range+0x20/0x50
[342246.877375] [<ffffffff8145eb29>] start_ordered_ops+0x19/0x30
[342246.877774] [<ffffffff8145ebc2>] btrfs_sync_file+0x82/0x3f0
[342246.878166] [<ffffffff810fb717>] ? update_fast_ctr+0x17/0x30
[342246.878564] [<ffffffff812a848b>] vfs_fsync_range+0x4b/0xb0
[342246.878987] [<ffffffff8128fce6>] ? __fget_light+0x66/0x90
[342246.879368] [<ffffffff812a854d>] do_fsync+0x3d/0x70
[342246.879708] [<ffffffff812a8823>] SyS_fdatasync+0x13/0x20
[342246.880099] [<ffffffff819cfd3c>] entry_SYSCALL_64_fastpath+0x1f/0xbd
[342246.880554] Code: 03 00 00 48 c7 c7 00 b3 c9 81 c6 05 54 b6 b1 00 01 e8 0e 8c c5 ff e9 e5 fe ff ff 49 8b 57 40 e9 c0 fe ff ff bb f4 ff ff ff eb a1 <0f> 0b 48 8b 55 80 41 b9 0f 00 00 00 41 b8 68 00 00 00 31 c9 31
[342246.882394] RIP [<ffffffff8144e9c7>] cow_file_range+0x3f7/0x440
[342246.882810] RSP <ffff8800702e39e0>
[342246.883076] ---[ end trace 094193b6df6e45e7 ]---
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Fixed by patch:
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