------------[ cut here ]------------
err = 556
WARNING: lib/errseq.c:76 at errseq_set+0xe4/0x110 lib/errseq.c:75, CPU#0: kworker/u4:5/152
Modules linked in:
CPU: 0 UID: 0 PID: 152 Comm: kworker/u4:5 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:errseq_set+0xe6/0x110 lib/errseq.c:75
Code: 12 fd 44 89 e5 89 e8 5b 41 5c 41 5e 41 5f 5d e9 d0 e6 f8 06 cc e8 ba 42 12 fd eb e9 e8 b3 42 12 fd 48 8d 3d 7c be 87 0b 89 de <67> 48 0f b9 3a eb d4 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 35 ff
RSP: 0000:ffffc900016bf040 EFLAGS: 00010293
RAX: ffffffff84b3845d RBX: 000000000000022c RCX: ffff888032aea540
RDX: 0000000000000000 RSI: 000000000000022c RDI: ffffffff903b42e0
RBP: 0000000000000000 R08: ffffc900016bf027 R09: 1ffff920002d7e04
R10: dffffc0000000000 R11: fffff520002d7e05 R12: ffffea00013eccc0
R13: ffff888046a13c58 R14: ffff888046a13d78 R15: 000000000000022c
FS:  0000000000000000(0000) GS:ffff88808c894000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5de9fa7000 CR3: 000000003ee85000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __filemap_set_wb_err+0x24/0x1e0 mm/filemap.c:704
 mapping_set_error include/linux/pagemap.h:244 [inline]
 ntfs_resident_writepage fs/ntfs3/inode.c:1016 [inline]
 ntfs_writepages+0x3dd/0x5e0 fs/ntfs3/inode.c:1043
 do_writepages+0x32e/0x550 mm/page-writeback.c:2571
 __writeback_single_inode+0x133/0x10e0 fs/fs-writeback.c:1764
 writeback_sb_inodes+0x979/0x19d0 fs/fs-writeback.c:2056
 __writeback_inodes_wb+0x111/0x240 fs/fs-writeback.c:2132
 wb_writeback+0x459/0xb00 fs/fs-writeback.c:2243
 wb_check_start_all fs/fs-writeback.c:2369 [inline]
 wb_do_writeback fs/fs-writeback.c:2395 [inline]
 wb_workfn+0x921/0xf10 fs/fs-writeback.c:2428
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	12 fd                	adc    %ch,%bh
   2:	44 89 e5             	mov    %r12d,%ebp
   5:	89 e8                	mov    %ebp,%eax
   7:	5b                   	pop    %rbx
   8:	41 5c                	pop    %r12
   a:	41 5e                	pop    %r14
   c:	41 5f                	pop    %r15
   e:	5d                   	pop    %rbp
   f:	e9 d0 e6 f8 06       	jmp    0x6f8e6e4
  14:	cc                   	int3
  15:	e8 ba 42 12 fd       	call   0xfd1242d4
  1a:	eb e9                	jmp    0x5
  1c:	e8 b3 42 12 fd       	call   0xfd1242d4
  21:	48 8d 3d 7c be 87 0b 	lea    0xb87be7c(%rip),%rdi        # 0xb87bea4
  28:	89 de                	mov    %ebx,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	eb d4                	jmp    0x5
  31:	44 89 f1             	mov    %r14d,%ecx
  34:	80 e1 07             	and    $0x7,%cl
  37:	80 c1 03             	add    $0x3,%cl
  3a:	38 c1                	cmp    %al,%cl
  3c:	0f                   	.byte 0xf
  3d:	8c                   	.byte 0x8c
  3e:	35                   	.byte 0x35
  3f:	ff                   	.byte 0xff