------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: CPU: 1 PID: 4234 at fs/btrfs/block-group.c:4000 do_chunk_alloc fs/btrfs/block-group.c:4000 [inline] WARNING: CPU: 1 PID: 4234 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: 4234 Comm: kworker/u8:29 Tainted: G W 6.16.0-syzkaller-03556-g0919a5b3b11c #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: c6 fd 84 c0 0f 84 63 01 00 00 e8 db 8f df fd e9 8c 03 00 00 e8 d1 8f df fd 90 48 c7 c7 60 78 4f 8b 44 89 f6 e8 b1 81 a4 fd 90 <0f> 0b 90 90 e9 3e fc ff ff e8 b2 8f df fd eb 05 e8 ab 8f df fd e8 RSP: 0018:ffffc9000eeef778 EFLAGS: 00010246 RAX: ae8b23b4a2014b00 RBX: ffff88805ef04001 RCX: ffff888033bbd940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed101712486b R12: dffffc0000000000 R13: ffff88803841e000 R14: ffffffffffffffe4 R15: ffff888040394ca8 FS: 0000000000000000(0000) GS:ffff888126c23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555a8c8808 CR3: 000000005b760000 CR4: 00000000003526f0 Call Trace: 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:3238 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245