------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: fs/btrfs/block-group.c:4012 at do_chunk_alloc fs/btrfs/block-group.c:4012 [inline], CPU#0: kworker/u8:8/1564 WARNING: fs/btrfs/block-group.c:4012 at btrfs_chunk_alloc+0x1150/0x1780 fs/btrfs/block-group.c:4253, CPU#0: kworker/u8:8/1564 Modules linked in: CPU: 0 UID: 0 PID: 1564 Comm: kworker/u8:8 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP 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:4012 [inline] pc : btrfs_chunk_alloc+0x1150/0x1780 fs/btrfs/block-group.c:4253 lr : do_chunk_alloc fs/btrfs/block-group.c:4012 [inline] lr : btrfs_chunk_alloc+0x1150/0x1780 fs/btrfs/block-group.c:4253 sp : ffff8000a0647770 x29: ffff8000a0647840 x28: ffffffffffffffe4 x27: 0000000000000001 x26: dfff800000000000 x25: ffff0000e06ce800 x24: ffff0000d0008000 x23: 0000000000280000 x22: ffff0000e11d0940 x21: 0000000000000000 x20: ffff0000d359a000 x19: 0000000000000000 x18: 000000000002fa93 x17: ffff8000825eecc0 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1ffff000140c8e60 x13: 0000000000000000 x12: 0000000000000000 x11: 000000000000128c x10: 0000000000ff0100 x9 : dec5652135a03c00 x8 : dec5652135a03c00 x7 : ffff8000805761f8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807f1260 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: do_chunk_alloc fs/btrfs/block-group.c:4012 [inline] (P) btrfs_chunk_alloc+0x1150/0x1780 fs/btrfs/block-group.c:4253 (P) flush_space+0x300/0xb64 fs/btrfs/space-info.c:894 do_async_reclaim_metadata_space+0x108/0x324 fs/btrfs/space-info.c:1185 btrfs_async_reclaim_metadata_space+0x90/0xd8 fs/btrfs/space-info.c:1252 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 85344 hardirqs last enabled at (85343): [] irqentry_exit+0x1b4/0x308 kernel/entry/common.c:219 hardirqs last disabled at (85344): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (85148): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (85146): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ 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 4947968 free, is not full BTRFS info (device loop4 state A): space_info total=11534336, used=61440, pinned=0, reserved=1400832, may_use=5124096, 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 32768 reserved 32768 BTRFS info (device loop4 state A): delayed_refs_rsv: size 983040 reserved 983040 BTRFS: error (device loop4 state A) in do_chunk_alloc:4012: errno=-28 No space left BTRFS info (device loop4 state EA): forced readonly