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kernel BUG at fs/ext4/inode.c:1909!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 1907 Comm: jbd2/sda1-8 Not tainted 4.4.132-g4f75c34 #43
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b64ee000 task.stack: ffff8800b6460000
RIP: 0010:[<ffffffff816e4ca1>]  [<ffffffff816e4ca1>] ext4_writepage+0x1061/0x1850 fs/ext4/inode.c:1909
RSP: 0018:ffff8800b64674d8  EFLAGS: 00010293
RAX: ffff8800b64ee000 RBX: 0000000000048204 RCX: ffffea0006a3d880
RDX: 0000000000000000 RSI: ffffffff816e4ca1 RDI: ffff8800bb405240
RBP: ffff8800b64675d8 R08: 00000000000234b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff84a14eb8 R14: ffffea0006a3d880 R15: ffffea0006a3d880
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5cc97f9848 CR3: 00000001c783f000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800b64675a0 ffff8800b64675c8 ffffea0006a3d890 ffffea0006a3d888
 1ffff10016c8cea6 ffff8800b6467b50 ffff8800bb4051f0 ffff8800bb4053d8
 0000100000000000 ffffea0006a3d880 ffffea00073ceddc 0000000041b58ab3
Call Trace:
 [<ffffffff81437134>] __writepage+0x64/0xc0 mm/page-writeback.c:2312
 [<ffffffff81439c84>] write_cache_pages+0x574/0xe10 mm/page-writeback.c:2250
 [<ffffffff8143a5fa>] generic_writepages+0xda/0x150 mm/page-writeback.c:2336
 [<ffffffff8181ffb2>] journal_submit_inode_data_buffers fs/jbd2/commit.c:203 [inline]
 [<ffffffff8181ffb2>] journal_submit_data_buffers fs/jbd2/commit.c:234 [inline]
 [<ffffffff8181ffb2>] jbd2_journal_commit_transaction+0xe92/0x65a0 fs/jbd2/commit.c:552
 [<ffffffff8183268a>] kjournald2+0x22a/0x830 fs/jbd2/journal.c:223
 [<ffffffff81190768>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff838c0655>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510
Code: 00 00 00 00 fc ff df 48 c1 eb 03 80 3c 03 00 0f 84 e5 f0 ff ff 48 c7 c7 60 48 a4 83 e8 d9 43 e1 ff e9 d4 f0 ff ff e8 3f c5 c6 ff <0f> 0b e8 38 c5 c6 ff 48 c7 c2 60 b8 ad 83 be 12 02 00 00 48 c7 
RIP  [<ffffffff816e4ca1>] ext4_writepage+0x1061/0x1850 fs/ext4/inode.c:1909
 RSP <ffff8800b64674d8>
---[ end trace 625bf3f63829a5a6 ]---