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kernel BUG at fs/ext4/inode.c:2618!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.9.135+ #113
Workqueue: writeback wb_workfn (flush-8:0)
task: ffff8801da678000 task.stack: ffff8801da680000
RIP: 0010:[<ffffffff816c4ee9>]  [<ffffffff816c4ee9>] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618
RSP: 0018:ffff8801da687378  EFLAGS: 00010293
RAX: ffff8801da678000 RBX: ffffea00042f7540 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816c4ee9 RDI: ffffea00042f7550
RBP: ffff8801da687538 R08: ffff8801da6788b0 R09: 0000000000024bb0
R10: ffffffffffffffe8 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000082 R14: dffffc0000000000 R15: ffff8801da6876a0
FS:  0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004d79a0 CR3: 000000013bb15000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 1ffff1003b4d0e7e ffff8801da687410 ffff8801da6876a8 ffff8801da6876b0
 00000002da6788b0 0007ffffffffffff ffff8801d41b3c58 0000000e0000000c
 7fffffffffffff7f ffff8801da687450 ffff8801da6876b8 ffffed003b4d0ed5
Call Trace:
 [<ffffffff816d587e>] ext4_writepages+0xeee/0x2e00 fs/ext4/inode.c:2780
 [<ffffffff81433c8f>] do_writepages+0xef/0x1d0 mm/page-writeback.c:2331
 [<ffffffff8159eaa9>] __writeback_single_inode+0xd9/0x1020 fs/fs-writeback.c:1320
 [<ffffffff8159fe9c>] writeback_sb_inodes+0x4ac/0xe70 fs/fs-writeback.c:1584
 [<ffffffff815a0d0f>] wb_writeback+0x2cf/0xbd0 fs/fs-writeback.c:1760
 [<ffffffff815a401e>] wb_do_writeback fs/fs-writeback.c:1894 [inline]
 [<ffffffff815a401e>] wb_workfn+0x20e/0xe90 fs/fs-writeback.c:1930
 [<ffffffff81130d61>] process_one_work+0x831/0x1530 kernel/workqueue.c:2092
 [<ffffffff81131b36>] worker_thread+0xd6/0x1140 kernel/workqueue.c:2226
 [<ffffffff811428dd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff8280addc>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Code: fc ff ff 48 89 95 b0 fe ff ff e8 13 66 c5 ff 48 8b 95 b0 fe ff ff 48 8d 42 ff e9 6f ff ff ff e8 fe 65 c5 ff 0f 0b e8 f7 65 c5 ff <0f> 0b 31 c0 89 85 b0 fe ff ff e8 e8 65 c5 ff 8b 85 18 ff ff ff 
RIP  [<ffffffff816c4ee9>] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618
 RSP <ffff8801da687378>
---[ end trace 2ec9f1b572dd6c70 ]---