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: CPU: 1 PID: 41 at fs/btrfs/block-group.c:4007 do_chunk_alloc fs/btrfs/block-group.c:4007 [inline] WARNING: CPU: 1 PID: 41 at fs/btrfs/block-group.c:4007 btrfs_chunk_alloc+0xee0/0x14f0 fs/btrfs/block-group.c:4248 Modules linked in: CPU: 1 UID: 0 PID: 41 Comm: kworker/u8:2 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events_unbound btrfs_async_reclaim_metadata_space pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : do_chunk_alloc fs/btrfs/block-group.c:4007 [inline] pc : btrfs_chunk_alloc+0xee0/0x14f0 fs/btrfs/block-group.c:4248 lr : do_chunk_alloc fs/btrfs/block-group.c:4007 [inline] lr : btrfs_chunk_alloc+0xee0/0x14f0 fs/btrfs/block-group.c:4248 sp : ffff8000990b77e0 x29: ffff8000990b7840 x28: ffff0000f50dc000 x27: ffffffffffffffe4 x26: 0000000000000001 x25: ffff0000da308000 x24: ffff0000dbe448b4 x23: dfff800000000000 x22: dfff800000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000dbe44800 x18: 00000000ffffffff x17: ffff8000825926f8 x16: ffff800082deb6c0 x15: 0000000000000001 x14: 1ffff00013216e70 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700013216e71 x10: 0000000000ff0100 x9 : 2c8eb6c7436c8a00 x8 : 2c8eb6c7436c8a00 x7 : ffff800080564a40 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807d6130 x2 : 0000000000000002 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: do_chunk_alloc fs/btrfs/block-group.c:4007 [inline] (P) btrfs_chunk_alloc+0xee0/0x14f0 fs/btrfs/block-group.c:4248 (P) flush_space+0x2f0/0xb68 fs/btrfs/space-info.c:861 do_async_reclaim_metadata_space+0x110/0x364 fs/btrfs/space-info.c:1158 btrfs_async_reclaim_metadata_space+0x90/0xd8 fs/btrfs/space-info.c:1226 process_one_work+0x7e8/0x155c kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3427 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 594300 hardirqs last enabled at (594299): [] irqentry_exit+0xd8/0x108 kernel/entry/common.c:214 hardirqs last disabled at (594300): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (594186): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (594186): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (594027): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop4 state A): dumping space info: BTRFS info (device loop4 state A): space_info DATA+METADATA (sub-group id 0) has 8978432 free, is not full BTRFS info (device loop4 state A): space_info total=11534336, used=53248, pinned=0, reserved=12288, may_use=2490368, readonly=0 zone_unusable=0 BTRFS info (device loop4 state A): space_info SYSTEM (sub-group id 0) has -98304 free, is not full BTRFS info (device loop4 state A): space_info total=4194304, used=4096, pinned=0, reserved=0, may_use=98304, readonly=4190208 zone_unusable=0 BTRFS info (device loop4 state A): global_block_rsv: size 1441792 reserved 1441792 BTRFS info (device loop4 state A): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop4 state A): chunk_block_rsv: size 98304 reserved 98304 BTRFS info (device loop4 state A): delayed_block_rsv: size 262144 reserved 262144 BTRFS info (device loop4 state A): delayed_refs_rsv: size 851968 reserved 786432 BTRFS: error (device loop4 state A) in do_chunk_alloc:4007: errno=-28 No space left BTRFS info (device loop4 state EA): forced readonly