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kernel BUG at fs/ext4/inode.c:2199!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 1 PID: 8914 Comm: loop0 Not tainted 4.14.81+ #6
task: ffff8801ccc82f00 task.stack: ffff8801c3d50000
RIP: 0010:mpage_submit_page+0x1a3/0x220 fs/ext4/inode.c:2199
RSP: 0018:ffff8801c3d57358 EFLAGS: 00010297
RAX: ffff8801ccc82f00 RBX: ffff8801c3d576b0 RCX: ffff8801c3d57480
RDX: 0000000000000000 RSI: ffffea00063c5280 RDI: ffff8801c3d576b0
RBP: ffffea00063c5280 R08: 0000000000000001 R09: 0000000000000000
R10: ffff8801ccc83780 R11: 0000000000000001 R12: ffff8801c3d576c0
R13: ffffea00063c5290 R14: 0000000000000000 R15: ffff880194e91e70
FS:  0000000000000000(0000) GS:ffff8801db900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001051338 CR3: 00000001a5c22002 CR4: 00000000001606a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 mpage_map_and_submit_buffers+0x3f3/0x710 fs/ext4/inode.c:2416
 mpage_map_and_submit_extent fs/ext4/inode.c:2554 [inline]
 ext4_writepages+0x1736/0x3040 fs/ext4/inode.c:2885
 do_writepages+0xe0/0x270 mm/page-writeback.c:2341
 __filemap_fdatawrite_range+0x19e/0x270 mm/filemap.c:345
 filemap_write_and_wait_range+0x58/0xd0 mm/filemap.c:556
 __generic_file_write_iter+0x2bc/0x540 mm/filemap.c:3148
 ext4_file_write_iter+0x4f6/0xe20 fs/ext4/file.c:264
 call_write_iter include/linux/fs.h:1782 [inline]
 lo_rw_aio+0x97b/0x1050 drivers/block/loop.c:540
 do_req_filebacked drivers/block/loop.c:582 [inline]
 loop_handle_cmd drivers/block/loop.c:1737 [inline]
 loop_queue_work+0x14c9/0x1e9a drivers/block/loop.c:1751
 kthread_worker_fn+0x27e/0x6a0 kernel/kthread.c:642
 kthread+0x348/0x420 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402
Code: 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 57 48 83 43 10 01 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 7d e7 bc ff <0f> 0b 4c 89 ef e8 23 e3 de ff e9 82 fe ff ff 4c 89 e7 e8 16 e3 
RIP: mpage_submit_page+0x1a3/0x220 fs/ext4/inode.c:2199 RSP: ffff8801c3d57358
---[ end trace 2cddbd41b5b4dc86 ]---