BTRFS info (device loop0): 0 free space entries at or bigger than 4096 bytes
BTRFS info (device loop0): 4190208 bytes available across all block groups
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/block-group.c:4000 at do_chunk_alloc fs/btrfs/block-group.c:4000 [inline], CPU#1: kworker/u8:0/12
WARNING: fs/btrfs/block-group.c:4000 at btrfs_chunk_alloc+0xf9d/0x1460 fs/btrfs/block-group.c:4241, CPU#1: kworker/u8:0/12
Modules linked in:
CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.16.0-next-20250731-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events_unbound btrfs_async_reclaim_metadata_space
RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:4000 [inline]
RIP: 0010:btrfs_chunk_alloc+0xf9d/0x1460 fs/btrfs/block-group.c:4241
Code: ba fd 84 c0 0f 84 63 01 00 00 e8 ae 10 d4 fd e9 8c 03 00 00 e8 a4 10 d4 fd 90 48 c7 c7 a0 f2 cf 8b 44 89 f6 e8 84 a7 97 fd 90 <0f> 0b 90 90 e9 3e fc ff ff e8 85 10 d4 fd eb 05 e8 7e 10 d4 fd e8
RSP: 0018:ffffc90000117778 EFLAGS: 00010246
RAX: d317fc7bc800de00 RBX: ffff888060d44001 RCX: ffff88801caeda00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: dffffc0000000000
R13: ffff88802858d000 R14: ffffffffffffffe4 R15: ffff888032d21de0
FS:  0000000000000000(0000) GS:ffff888125d43000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007eff28a70000 CR3: 0000000077d4a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 flush_space+0x30b/0xcd0 fs/btrfs/space-info.c:861
 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:3236 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>