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[ 135.166891] BTRFS info (device loop0): disk space caching is enabled
[ 135.169199] divide error: 0000 [#1] SMP
[ 135.169581] Modules linked in:
[ 135.169819] CPU: 2 PID: 1512 Comm: btrfs.exe Tainted: G W 4.6.0-rc5 #130
[ 135.170285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.8.2-20150714_191134- 04/01/2014
[ 135.170958] task: ffff880074925180 ti: ffff880077fa4000 task.ti: ffff880077fa4000
[ 135.171583] RIP: 0010:[<ffffffff81475ba0>] [<ffffffff81475ba0>] __btrfs_map_block+0xc0/0x11b0
[ 135.172096] RSP: 0000:ffff880077fa77b0 EFLAGS: 00010206
[ 135.172374] RAX: 0000000000020000 RBX: 0000000000020000 RCX: 0000000000000000
[ 135.172754] RDX: 0000000000000000 RSI: 0000000000400000 RDI: ffff880076258270
[ 135.173143] RBP: ffff880077fa7898 R08: 0000000000400000 R09: 0000000000000000
[ 135.173523] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000020000
[ 135.173916] R13: ffff880076258270 R14: ffff880077fa78e0 R15: ffff88006bb3b000
[ 135.174290] FS: 00007fd8267dc700(0000) GS:ffff88007ca00000(0000) knlGS:0000000000000000
[ 135.174718] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 135.175019] CR2: 00007ffe9c378df7 CR3: 0000000078788000 CR4: 00000000000006e0
[ 135.175392] Stack:
[ 135.175503] ffff88007cbe2c40 0000000000000000 ffff88007cbe2c50 ffff880074925180
[ 135.175924] ffff880074926560 ffff880074925180 0000000200000000 0000000000000000
[ 135.176340] ffffffffffffffff 0007ffffffffffff ffffffff8143eb18 0240004000000000
[ 135.176778] Call Trace:
[ 135.176913] [<ffffffff8143eb18>] ? btrfs_bio_wq_end_io+0x28/0x70
[ 135.177234] [<ffffffff81477218>] btrfs_map_bio+0x88/0x350
[ 135.177522] [<ffffffff8143eb18>] ? btrfs_bio_wq_end_io+0x28/0x70
[ 135.177960] [<ffffffff8143ed9d>] btree_submit_bio_hook+0x6d/0x110
[ 135.178410] [<ffffffff81464d1d>] submit_one_bio+0x6d/0xa0
[ 135.178814] [<ffffffff8146d6f1>] read_extent_buffer_pages+0x1c1/0x350
[ 135.179276] [<ffffffff8143cd60>] ? free_root_pointers+0x70/0x70
[ 135.179708] [<ffffffff8143e12c>] btree_read_extent_buffer_pages.constprop.55+0xac/0x110
[ 135.180261] [<ffffffff8143f036>] read_tree_block+0x36/0x60
[ 135.180647] [<ffffffff81443b52>] open_ctree+0x17a2/0x2900
[ 135.181027] [<ffffffff81417225>] btrfs_mount+0xd05/0xe60
[ 135.181400] [<ffffffff819cd15a>] ? __mutex_unlock_slowpath+0xfa/0x1c0
[ 135.181850] [<ffffffff810fd3e4>] ? lockdep_init_map+0x64/0x710
[ 135.182241] [<ffffffff81272918>] mount_fs+0x38/0x170
[ 135.182609] [<ffffffff81292b7b>] vfs_kern_mount+0x6b/0x150
[ 135.182998] [<ffffffff814166e6>] btrfs_mount+0x1c6/0xe60
[ 135.183372] [<ffffffff819cd15a>] ? __mutex_unlock_slowpath+0xfa/0x1c0
[ 135.183825] [<ffffffff810fd3e4>] ? lockdep_init_map+0x64/0x710
[ 135.184233] [<ffffffff81272918>] mount_fs+0x38/0x170
[ 135.184583] [<ffffffff81292b7b>] vfs_kern_mount+0x6b/0x150
[ 135.184971] [<ffffffff812958c6>] do_mount+0x256/0xeb0
[ 135.185318] [<ffffffff8124bb33>] ? __kmalloc_track_caller+0x113/0x290
[ 135.185759] [<ffffffff812b0b63>] ? block_ioctl+0x43/0x50
[ 135.186124] [<ffffffff811ff023>] ? memdup_user+0x53/0x80
[ 135.186488] [<ffffffff81296865>] SyS_mount+0x95/0xe0
[ 135.186877] [<ffffffff819cfd3c>] entry_SYSCALL_64_fastpath+0x1f/0xbd
[ 135.187308] Code: 8b 70 20 4c 8d 04 31 4c 39 c3 0f 87 2f 0b 00 00 48 8b 45 a8 49 89 dc 31 d2 49 29 cc 48 8b 40 70 48 63 48 10 48 89 45 a0 4c 89 e0 <48> f7 f1 49 89 cf 48 89 45 b8 48 0f af c1 49 39 c4 0f 82 c3 0a
[ 135.189097] RIP [<ffffffff81475ba0>] __btrfs_map_block+0xc0/0x11b0
[ 135.189527] RSP <ffff880077fa77b0>
[ 135.189819] ---[ end trace ea21fae64670799a ]---
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Fixed by patch:
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