------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/block-group.c:4106 at do_chunk_alloc fs/btrfs/block-group.c:4106 [inline], CPU#0: kworker/u4:2/30
WARNING: fs/btrfs/block-group.c:4106 at btrfs_chunk_alloc+0x101d/0x15e0 fs/btrfs/block-group.c:4347, CPU#0: kworker/u4:2/30
Modules linked in:
CPU: 0 UID: 0 PID: 30 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: events_unbound btrfs_async_reclaim_data_space
RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:4106 [inline]
RIP: 0010:btrfs_chunk_alloc+0x101f/0x15e0 fs/btrfs/block-group.c:4347
Code: f7 34 b2 fd e9 6d 01 00 00 e8 0d 3f 97 fd 84 c0 74 22 e8 e4 34 b2 fd e9 5a 01 00 00 e8 da 34 b2 fd 48 8d 3d d3 e1 07 0c 89 de <67> 48 0f b9 3a e9 b3 fc ff ff e8 72 c1 9b 07 41 89 c6 31 ff 89 c6
RSP: 0018:ffffc900003877b0 EFLAGS: 00010293
RAX: ffffffff84136676 RBX: ffffffffffffffe4 RCX: ffff88801f2ba480
RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff901b4850
RBP: 0000000000000000 R08: ffff88801f2ba480 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: 1ffff1100835ab16
R13: ffff888047b2cac8 R14: ffff888038cb4001 R15: ffff8880340e9800
FS:  0000000000000000(0000) GS:ffff88808ca59000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feb38cdbff0 CR3: 00000000434aa000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 flush_space+0x353/0xd80 fs/btrfs/space-info.c:896
 do_async_reclaim_data_space+0x145/0x520 fs/btrfs/space-info.c:1423
 btrfs_async_reclaim_data_space+0x41/0x90 fs/btrfs/space-info.c:1487
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358
 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 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:	f7 34 b2             	divl   (%rdx,%rsi,4)
   3:	fd                   	std
   4:	e9 6d 01 00 00       	jmp    0x176
   9:	e8 0d 3f 97 fd       	call   0xfd973f1b
   e:	84 c0                	test   %al,%al
  10:	74 22                	je     0x34
  12:	e8 e4 34 b2 fd       	call   0xfdb234fb
  17:	e9 5a 01 00 00       	jmp    0x176
  1c:	e8 da 34 b2 fd       	call   0xfdb234fb
  21:	48 8d 3d d3 e1 07 0c 	lea    0xc07e1d3(%rip),%rdi        # 0xc07e1fb
  28:	89 de                	mov    %ebx,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 b3 fc ff ff       	jmp    0xfffffce7
  34:	e8 72 c1 9b 07       	call   0x79bc1ab
  39:	41 89 c6             	mov    %eax,%r14d
  3c:	31 ff                	xor    %edi,%edi
  3e:	89 c6                	mov    %eax,%esi