BTRFS info (device loop1): delayed_refs_rsv: size 65536 reserved 0
BTRFS info (device loop1): block group 1048576 has 4194304 bytes, 4096 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (4190208 bytes available) [readonly]
BTRFS info (device loop1): block group has cluster?: no
BTRFS info (device loop1): 0 free space entries at or bigger than 4096 bytes
BTRFS info (device loop1): 4190208 bytes available across all block groups
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: CPU: 1 PID: 37 at fs/btrfs/block-group.c:4000 do_chunk_alloc fs/btrfs/block-group.c:4000 [inline]
WARNING: CPU: 1 PID: 37 at fs/btrfs/block-group.c:4000 btrfs_chunk_alloc+0xfa0/0x1470 fs/btrfs/block-group.c:4241
Modules linked in:
CPU: 1 UID: 0 PID: 37 Comm: kworker/u8:2 Tainted: G        W           6.17.0-rc2-syzkaller-00028-gbe48bcf004f9 #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
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+0xfa0/0x1470 fs/btrfs/block-group.c:4241
Code: c3 fd 84 c0 0f 84 63 01 00 00 e8 1b bb dc fd e9 8c 03 00 00 e8 11 bb dc fd 90 48 c7 c7 20 95 4f 8b 44 89 f6 e8 a1 8e a1 fd 90 <0f> 0b 90 90 e9 3e fc ff ff e8 f2 ba dc fd eb 05 e8 eb ba dc fd e8
RSP: 0018:ffffc90000ac7778 EFLAGS: 00010246
RAX: 07ac91cdb67ca500 RBX: ffff888055044001 RCX: ffff88801ceabb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017124863 R12: dffffc0000000000
R13: ffff88805cac3800 R14: ffffffffffffffe4 R15: ffff88805d57e5a0
FS:  0000000000000000(0000) GS:ffff8881269c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5dc40345b8 CR3: 0000000072df4000 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+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 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>