------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: CPU: 0 PID: 2094 at fs/btrfs/block-group.c:3990 do_chunk_alloc fs/btrfs/block-group.c:3990 [inline] WARNING: CPU: 0 PID: 2094 at fs/btrfs/block-group.c:3990 btrfs_chunk_alloc+0xf58/0x1220 fs/btrfs/block-group.c:4231 Modules linked in: CPU: 0 UID: 0 PID: 2094 Comm: kworker/u8:9 Not tainted 6.16.0-rc1-syzkaller-g19272b37aa4f #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound btrfs_async_reclaim_metadata_space pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : do_chunk_alloc fs/btrfs/block-group.c:3990 [inline] pc : btrfs_chunk_alloc+0xf58/0x1220 fs/btrfs/block-group.c:4231 lr : do_chunk_alloc fs/btrfs/block-group.c:3990 [inline] lr : btrfs_chunk_alloc+0xf58/0x1220 fs/btrfs/block-group.c:4231 sp : ffff8000a06277c0 x29: ffff8000a0627820 x28: ffff0000ff23a000 x27: ffffffffffffffe4 x26: 0000000000000001 x25: ffff0000ffa290b4 x24: ffff0000f2b97940 x23: dfff800000000000 x22: ffff0000c9dfc000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000ffa29000 x18: 1fffe00033802c76 x17: ffff80008f55e000 x16: ffff80008ae5617c x15: 0000000000000001 x14: 1fffe00033805a20 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093014c08 x10: 0000000000000003 x9 : ea0f2e766baf4a00 x8 : ea0f2e766baf4a00 x7 : ffff800080484294 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b492da0 x0 : 0000000000000001 Call trace: do_chunk_alloc fs/btrfs/block-group.c:3990 [inline] (P) btrfs_chunk_alloc+0xf58/0x1220 fs/btrfs/block-group.c:4231 (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:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847 irq event stamp: 1781872 hardirqs last enabled at (1781871): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1544 [inline] hardirqs last enabled at (1781871): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5144 hardirqs last disabled at (1781872): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:511 softirqs last enabled at (1781652): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (1781652): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (1781541): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ 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 8781824 free, is not full BTRFS info (device loop4 state A): space_info total=11534336, used=53248, pinned=0, reserved=12288, may_use=2686976, 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 393216 reserved 393216 BTRFS info (device loop4 state A): delayed_refs_rsv: size 851968 reserved 851968 BTRFS: error (device loop4 state A) in do_chunk_alloc:3990: errno=-28 No space left BTRFS info (device loop4 state EA): forced readonly