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BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/inode.c:3239 at btrfs_finish_one_ordered+0x1934/0x2b80 fs/btrfs/inode.c:3239, CPU#1: kworker/u32:0/12
Modules linked in:
CPU: 1 UID: 0 PID: 12 Comm: kworker/u32:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: btrfs-endio-write btrfs_work_helper
RIP: 0010:btrfs_finish_one_ordered+0x1937/0x2b80 fs/btrfs/inode.c:3239
Code: d7 fd 41 8d 44 24 1e 83 f8 19 77 0f ba 01 00 04 02 48 0f a3 c2 0f 82 2e 03 00 00 e8 03 7b d7 fd 48 8d 3d 8c 68 a9 0c 44 89 e6 <67> 48 0f b9 3a c7 04 24 01 00 00 00 e8 e8 7a d7 fd 44 8b 04 24 44
RSP: 0018:ffffc900000f79d0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880279b8b80 RCX: ffffffff83e780af
RDX: ffff88801da84980 RSI: 00000000ffffffe4 RDI: ffffffff9090e960
RBP: ffff88803c746250 R08: 0000000000000005 R09: fffffffffffffffb
R10: ffffffffffffffe4 R11: 0000000000002ba1 R12: 00000000ffffffe4
R13: ffff88803c7462b0 R14: ffff8880279b8bc0 R15: ffff88803e6c88a0
FS:  0000000000000000(0000) GS:ffff8880d69f4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8779349d58 CR3: 0000000031c37000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_work_helper+0x21b/0xc10 fs/btrfs/async-thread.c:312
 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 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:	d7                   	xlat   %ds:(%rbx)
   1:	fd                   	std
   2:	41 8d 44 24 1e       	lea    0x1e(%r12),%eax
   7:	83 f8 19             	cmp    $0x19,%eax
   a:	77 0f                	ja     0x1b
   c:	ba 01 00 04 02       	mov    $0x2040001,%edx
  11:	48 0f a3 c2          	bt     %rax,%rdx
  15:	0f 82 2e 03 00 00    	jb     0x349
  1b:	e8 03 7b d7 fd       	call   0xfdd77b23
  20:	48 8d 3d 8c 68 a9 0c 	lea    0xca9688c(%rip),%rdi        # 0xca968b3
  27:	44 89 e6             	mov    %r12d,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	c7 04 24 01 00 00 00 	movl   $0x1,(%rsp)
  36:	e8 e8 7a d7 fd       	call   0xfdd77b23
  3b:	44 8b 04 24          	mov    (%rsp),%r8d
  3f:	44                   	rex.R