BTRFS critical (device loop2): entry offset 8523776, bytes 8253440, bitmap no BTRFS info (device loop2): block group has cluster?: no BTRFS info (device loop2): 1 blocks of free space at or bigger than bytes is ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4580 at fs/btrfs/volumes.c:3265 btrfs_remove_chunk+0x123c/0x1864 fs/btrfs/volumes.c:3265 Modules linked in: CPU: 1 PID: 4580 Comm: syz.2.15 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : btrfs_remove_chunk+0x123c/0x1864 fs/btrfs/volumes.c:3265 lr : btrfs_remove_chunk+0x123c/0x1864 fs/btrfs/volumes.c:3265 sp : ffff8000216a7700 x29: ffff8000216a7860 x28: ffff7000042d4ef4 x27: ffff8000216a77a0 x26: dfff800000000000 x25: ffffffffffffffe4 x24: 1fffe0001ee5bf44 x23: ffff0000f72dfa24 x22: ffff0000f595f500 x21: ffff0000f595f514 x20: 0000000000000000 x19: 0000000000000000 x18: ffff800011b9bf60 x17: 1fffe00033eaa57e x16: ffff8000082d92bc x15: ffff80001521d000 x14: 0000000000000001 x13: 1fffe00033eacc30 x12: 0000000000ff0100 x11: ff0080000a8dee24 x10: 0000000000000003 x9 : 3dfb201c97dbb400 x8 : 3dfb201c97dbb400 x7 : ffff800008257984 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff800011b9da80 x0 : ffff80018a3dd000 Call trace: btrfs_remove_chunk+0x123c/0x1864 fs/btrfs/volumes.c:3265 btrfs_relocate_chunk+0x24c/0x364 fs/btrfs/volumes.c:3395 __btrfs_balance+0x138c/0x1b34 fs/btrfs/volumes.c:4104 btrfs_balance+0xa44/0xe18 fs/btrfs/volumes.c:4480 btrfs_ioctl_balance+0x3c0/0x5f8 fs/btrfs/ioctl.c:4536 btrfs_ioctl+0x95c/0xb38 fs/btrfs/ioctl.c:5593 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 76794 hardirqs last enabled at (76793): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline] hardirqs last enabled at (76793): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5004 hardirqs last disabled at (76794): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (76722): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (76722): [] handle_softirqs+0xaec/0xc60 kernel/softirq.c:624 softirqs last disabled at (76583): [] __do_softirq+0x14/0x20 kernel/softirq.c:630 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop2: state A): dumping space info: BTRFS info (device loop2: state A): space_info DATA+METADATA (sub-group id 0) has 1343488 free, is not full BTRFS info (device loop2: state A): space_info total=3276800, used=61440, pinned=0, reserved=8192, may_use=1863680, readonly=0 zone_unusable=0 BTRFS info (device loop2: state A): space_info SYSTEM (sub-group id 0) has 8253440 free, is not full BTRFS info (device loop2: state A): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=0, readonly=4194304 zone_unusable=0 BTRFS info (device loop2: state A): global_block_rsv: size 1441792 reserved 1437696 BTRFS info (device loop2: state A): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop2: state A): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop2: state A): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop2: state A): delayed_refs_rsv: size 524288 reserved 163840 BTRFS: error (device loop2: state A) in btrfs_remove_chunk:3265: errno=-28 No space left BTRFS info (device loop2: state EA): forced readonly BTRFS info (device loop2: state EA): 1 enospc errors during balance BTRFS info (device loop2: state EA): balance: ended with status: -28