------------[ cut here ]------------
err = 556
WARNING: lib/errseq.c:76 at errseq_set+0xe4/0x110 lib/errseq.c:75, CPU#0: kworker/u4:2/14
Modules linked in:
CPU: 0 UID: 0 PID: 14 Comm: kworker/u4:2 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: 22 fd 44 89 e5 89 e8 5b 41 5c 41 5e 41 5f 5d e9 c0 84 f9 06 cc e8 4a 28 22 fd eb e9 e8 43 28 22 fd 48 8d 3d 0c 7b 57 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: 0018:ffffc9000040f088 EFLAGS: 00010293
RAX: ffffffff84a25ead RBX: 000000000000022c RCX: ffff88801c6b24c0
RDX: 0000000000000000 RSI: 000000000000022c RDI: ffffffff8ff9d9c0
RBP: 0000000000000000 R08: ffffc9000040f067 R09: 1ffff92000081e0c
R10: dffffc0000000000 R11: fffff52000081e0d R12: ffffea0001548e40
R13: ffff8880472171a8 R14: ffff8880472172d8 R15: 000000000000022c
FS:  0000000000000000(0000) GS:ffff88808ccea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe1416c018 CR3: 0000000044682000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __filemap_set_wb_err+0x22/0x1c0 mm/filemap.c:703
 mapping_set_error include/linux/pagemap.h:245 [inline]
 ntfs_resident_writepage fs/ntfs3/inode.c:896 [inline]
 ntfs_writepages+0x348/0x530 fs/ntfs3/inode.c:917
 do_writepages+0x32e/0x550 mm/page-writeback.c:2598
 __writeback_single_inode+0x133/0x1230 fs/fs-writeback.c:1737
 writeback_sb_inodes+0x92e/0x1940 fs/fs-writeback.c:2030
 __writeback_inodes_wb+0x111/0x240 fs/fs-writeback.c:2107
 wb_writeback+0x459/0xad0 fs/fs-writeback.c:2218
 wb_check_start_all fs/fs-writeback.c:2344 [inline]
 wb_do_writeback fs/fs-writeback.c:2370 [inline]
 wb_workfn+0x8fd/0xef0 fs/fs-writeback.c:2403
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
----------------
Code disassembly (best guess):
   0:	22 fd                	and    %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 c0 84 f9 06       	jmp    0x6f984d4
  14:	cc                   	int3
  15:	e8 4a 28 22 fd       	call   0xfd222864
  1a:	eb e9                	jmp    0x5
  1c:	e8 43 28 22 fd       	call   0xfd222864
  21:	48 8d 3d 0c 7b 57 0b 	lea    0xb577b0c(%rip),%rdi        # 0xb577b34
  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