BTRFS info (device loop4): block group has cluster?: no
BTRFS info (device loop4): 0 free space entries at or bigger than 4096 bytes
BTRFS info (device loop4): 4190208 bytes available across all block groups
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/block-group.c:4097 at do_chunk_alloc fs/btrfs/block-group.c:4097 [inline], CPU#0: kworker/u8:1/13
WARNING: fs/btrfs/block-group.c:4097 at btrfs_chunk_alloc+0x101d/0x15e0 fs/btrfs/block-group.c:4338, CPU#0: kworker/u8:1/13
Modules linked in:
CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Workqueue: events_unbound btrfs_async_reclaim_data_space
RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:4097 [inline]
RIP: 0010:btrfs_chunk_alloc+0x101f/0x15e0 fs/btrfs/block-group.c:4338
Code: 67 66 b4 fd e9 6d 01 00 00 e8 1d 7f 99 fd 84 c0 74 22 e8 54 66 b4 fd e9 5a 01 00 00 e8 4a 66 b4 fd 48 8d 3d a3 ba 09 0c 89 de <67> 48 0f b9 3a e9 b3 fc ff ff e8 32 90 9b 07 41 89 c6 31 ff 89 c6
RSP: 0018:ffffc900001277f0 EFLAGS: 00010293
RAX: ffffffff841137b6 RBX: ffffffffffffffe4 RCX: ffff88801e285ac0
RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff901af260
RBP: 0000000000000000 R08: ffff88801e285ac0 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: 1ffff1100a611016
R13: ffff88808b4b69a0 R14: ffff888053720001 R15: ffff88805b6a2000
FS:  0000000000000000(0000) GS:ffff888125469000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f668382950 CR3: 0000000075942000 CR4: 00000000003526f0
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+0x949/0x1650 kernel/workqueue.c:3279
 process_scheduled_works kernel/workqueue.c:3362 [inline]
 worker_thread+0xb46/0x1140 kernel/workqueue.c:3443
 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:	67 66 b4 fd          	addr32 data16 mov $0xfd,%ah
   4:	e9 6d 01 00 00       	jmp    0x176
   9:	e8 1d 7f 99 fd       	call   0xfd997f2b
   e:	84 c0                	test   %al,%al
  10:	74 22                	je     0x34
  12:	e8 54 66 b4 fd       	call   0xfdb4666b
  17:	e9 5a 01 00 00       	jmp    0x176
  1c:	e8 4a 66 b4 fd       	call   0xfdb4666b
  21:	48 8d 3d a3 ba 09 0c 	lea    0xc09baa3(%rip),%rdi        # 0xc09bacb
  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 32 90 9b 07       	call   0x79b906b
  39:	41 89 c6             	mov    %eax,%r14d
  3c:	31 ff                	xor    %edi,%edi
  3e:	89 c6                	mov    %eax,%esi