BTRFS warning (device loop0): Skipping commit of aborted transaction.
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/transaction.c:2020 at 0x0, CPU#0: kworker/u4:9/1078
Modules linked in:
CPU: 0 UID: 0 PID: 1078 Comm: kworker/u4:9 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: events_unbound btrfs_async_reclaim_metadata_space
RIP: 0010:cleanup_transaction fs/btrfs/transaction.c:2020 [inline]
RIP: 0010:btrfs_commit_transaction+0x2f5b/0x3950 fs/btrfs/transaction.c:2611
Code: 07 e8 69 ce f1 fd eb 7d e8 82 be d7 fd 84 c0 74 25 e8 59 ce f1 fd eb 6d e8 52 ce f1 fd 48 8d 3d 7b c4 b9 0b 8b 5c 24 18 89 de <67> 48 0f b9 3a 89 d9 e9 1a 01 00 00 e8 04 28 79 07 89 c3 31 ff 89
RSP: 0018:ffffc900026374c0 EFLAGS: 00010293
RAX: ffffffff83cf3fde RBX: 00000000ffffffe4 RCX: ffff888033014980
RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff8f890460
RBP: ffffc900026377f0 R08: ffff888033014980 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: ffff888033015c38
R13: ffff888059c3c000 R14: ffff888059c3c000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88808d6b7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32b24224 CR3: 0000000055079000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 flush_space+0x48b/0xcb0 fs/btrfs/space-info.c:888
 do_async_reclaim_metadata_space+0x144/0x390 fs/btrfs/space-info.c:1158
 btrfs_async_reclaim_metadata_space+0x89/0xe0 fs/btrfs/space-info.c:1226
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	e8 69 ce f1 fd       	call   0xfdf1ce6e
   5:	eb 7d                	jmp    0x84
   7:	e8 82 be d7 fd       	call   0xfdd7be8e
   c:	84 c0                	test   %al,%al
   e:	74 25                	je     0x35
  10:	e8 59 ce f1 fd       	call   0xfdf1ce6e
  15:	eb 6d                	jmp    0x84
  17:	e8 52 ce f1 fd       	call   0xfdf1ce6e
  1c:	48 8d 3d 7b c4 b9 0b 	lea    0xbb9c47b(%rip),%rdi        # 0xbb9c49e
  23:	8b 5c 24 18          	mov    0x18(%rsp),%ebx
  27:	89 de                	mov    %ebx,%esi
* 29:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2e:	89 d9                	mov    %ebx,%ecx
  30:	e9 1a 01 00 00       	jmp    0x14f
  35:	e8 04 28 79 07       	call   0x779283e
  3a:	89 c3                	mov    %eax,%ebx
  3c:	31 ff                	xor    %edi,%edi
  3e:	89                   	.byte 0x89