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kernel BUG at fs/ext4/inode.c:2462!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 20337 Comm: kworker/u4:9 Not tainted 4.4.163+ #122
Workqueue: writeback wb_workfn (flush-8:0)
task: ffff8800b6492f80 task.stack: ffff8800a05b8000
RIP: 0010:[<ffffffff81640120>]  [<ffffffff81640120>] mpage_prepare_extent_to_map+0x670/0x8e0 fs/ext4/inode.c:2462
RSP: 0018:ffff8800a05bf330  EFLAGS: 00010293
RAX: ffff8800b6492f80 RBX: ffffea0002026440 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81640120 RDI: ffffea0002026450
RBP: ffff8800a05bf4e8 R08: ffff8800b6493848 R09: 0000000000022628
R10: ffffffffffffffe8 R11: 0000000000000000 R12: 0000000000000008
R13: 0000000000000045 R14: dffffc0000000000 R15: ffff8800a05bf630
FS:  0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c000 CR3: 00000000aac6f000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Stack:
 1ffff100140b7e74 ffff8800a05bf3c0 ffff8800a05bf638 ffff8800a05bf640
 00000000a05bf410 00000000000001a2 ffff8800bb7ea3b8 0000000e0000000c
 00000000000007c0 ffff8800a05bf400 ffff8800a05bf648 ffffed00140b7ec7
Call Trace:
 [<ffffffff8164f37c>] ext4_writepages+0xd4c/0x2c20 fs/ext4/inode.c:2617
 [<ffffffff813d76ff>] do_writepages+0xef/0x1d0 mm/page-writeback.c:2334
 [<ffffffff81520141>] __writeback_single_inode+0x101/0x1340 fs/fs-writeback.c:1285
 [<ffffffff8152182b>] writeback_sb_inodes+0x4ab/0xee0 fs/fs-writeback.c:1548
 [<ffffffff8152235b>] __writeback_inodes_wb+0xfb/0x1e0 fs/fs-writeback.c:1617
 [<ffffffff81522969>] wb_writeback+0x529/0xd00 fs/fs-writeback.c:1726
 [<ffffffff815255e6>] wb_check_old_data_flush fs/fs-writeback.c:1841 [inline]
 [<ffffffff815255e6>] wb_do_writeback fs/fs-writeback.c:1865 [inline]
 [<ffffffff815255e6>] wb_workfn+0x966/0x1010 fs/fs-writeback.c:1894
 [<ffffffff81122c94>] process_one_work+0x824/0x1730 kernel/workqueue.c:2064
 [<ffffffff81123c79>] worker_thread+0xd9/0x1060 kernel/workqueue.c:2196
 [<ffffffff811340d8>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff827127c5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510
Code: 48 89 df e8 c3 44 d7 ff e9 32 ff ff ff e8 79 71 cc ff 48 89 df e8 51 5e d7 ff e9 fa fd ff ff e8 67 71 cc ff 0f 0b e8 60 71 cc ff <0f> 0b 31 c0 89 85 b0 fe ff ff e8 51 71 cc ff 8b 85 18 ff ff ff 
RIP  [<ffffffff81640120>] mpage_prepare_extent_to_map+0x670/0x8e0 fs/ext4/inode.c:2462
 RSP <ffff8800a05bf330>
---[ end trace f0965a42bf4f5684 ]---