BTRFS warning (device loop0): Skipping commit of aborted transaction.
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/transaction.c:2068 at cleanup_transaction+0x800/0x9d0 fs/btrfs/transaction.c:2068, CPU#0: kworker/u4:3/42
Modules linked in:
CPU: 0 UID: 0 PID: 42 Comm: kworker/u4:3 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: events_unbound btrfs_async_reclaim_metadata_space
RIP: 0010:cleanup_transaction+0x803/0x9d0 fs/btrfs/transaction.c:2068
Code: 0a e8 f1 fa d6 fd e9 87 00 00 00 e8 b7 0f bc fd 84 c0 74 2f e8 de fa d6 fd eb 77 e8 d7 fa d6 fd 48 8d 3d 60 c6 4d 0c 44 89 e6 <67> 48 0f b9 3a 49 bf 00 00 00 00 00 fc ff df 4c 8b 6c 24 18 e9 8d
RSP: 0000:ffffc900004473e0 EFLAGS: 00010293
RAX: ffffffff83eee3e9 RBX: ffff88801f8a7000 RCX: ffff88801cc7a500
RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff903caa50
RBP: ffffc90000447510 R08: ffff88801cc7a500 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: 00000000ffffffe4
R13: ffff888046346350 R14: 0000000000000000 R15: 1ffff11008c68c6a
FS:  0000000000000000(0000) GS:ffff88808c812000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa0477ab000 CR3: 00000000439c4000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_commit_transaction+0x266c/0x30e0 fs/btrfs/transaction.c:2660
 flush_space+0x2a3/0xe20 fs/btrfs/space-info.c:-1
 do_async_reclaim_metadata_space+0x3fc/0x960 fs/btrfs/space-info.c:1211
 btrfs_async_reclaim_metadata_space+0x89/0xe0 fs/btrfs/space-info.c:1278
 process_one_work kernel/workqueue.c:3302 [inline]
 process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466
 kthread+0x388/0x470 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), 1 bytes skipped:
   0:	e8 f1 fa d6 fd       	call   0xfdd6faf6
   5:	e9 87 00 00 00       	jmp    0x91
   a:	e8 b7 0f bc fd       	call   0xfdbc0fc6
   f:	84 c0                	test   %al,%al
  11:	74 2f                	je     0x42
  13:	e8 de fa d6 fd       	call   0xfdd6faf6
  18:	eb 77                	jmp    0x91
  1a:	e8 d7 fa d6 fd       	call   0xfdd6faf6
  1f:	48 8d 3d 60 c6 4d 0c 	lea    0xc4dc660(%rip),%rdi        # 0xc4dc686
  26:	44 89 e6             	mov    %r12d,%esi
* 29:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2e:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  35:	fc ff df
  38:	4c 8b 6c 24 18       	mov    0x18(%rsp),%r13
  3d:	e9                   	.byte 0xe9
  3e:	8d                   	.byte 0x8d