BTRFS info (device loop1): 0 free space entries at or bigger than 4096 bytes BTRFS info (device loop1): 4194304 bytes available across all block groups ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: CPU: 1 PID: 7387 at fs/btrfs/volumes.c:3360 btrfs_remove_chunk+0x1718/0x1ee0 fs/btrfs/volumes.c:3360 Modules linked in: CPU: 1 UID: 0 PID: 7387 Comm: syz.1.176 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : btrfs_remove_chunk+0x1718/0x1ee0 fs/btrfs/volumes.c:3360 lr : btrfs_remove_chunk+0x1718/0x1ee0 fs/btrfs/volumes.c:3360 sp : ffff8000a0d87700 x29: ffff8000a0d87880 x28: dfff800000000000 x27: ffff8000a0d87780 x26: ffff7000141b0ef0 x25: dfff800000000000 x24: ffff0000f9087900 x23: ffffffffffffffe4 x22: dfff800000000000 x21: ffff0000c15c4cb8 x20: 0000000000000000 x19: 0000000000000000 x18: 00000000ffffffff x17: 6c62206c6c612073 x16: ffff80008b0142f8 x15: 0000000000000001 x14: 1ffff000141b0e50 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 000000000007ffff x9 : 2da534aeb371c000 x8 : 2da534aeb371c000 x7 : ffff800080563d30 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807de9b0 x2 : 0000000000000002 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: btrfs_remove_chunk+0x1718/0x1ee0 fs/btrfs/volumes.c:3360 (P) btrfs_relocate_chunk+0x258/0x54c fs/btrfs/volumes.c:3491 __btrfs_balance+0x1358/0x1d30 fs/btrfs/volumes.c:4222 btrfs_balance+0x8cc/0xf58 fs/btrfs/volumes.c:4599 btrfs_ioctl_balance+0x350/0x550 fs/btrfs/ioctl.c:3577 btrfs_ioctl+0xb04/0xc3c fs/btrfs/ioctl.c:5298 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl fs/ioctl.c:584 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:584 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 56476 hardirqs last enabled at (56475): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline] hardirqs last enabled at (56475): [] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96 hardirqs last disabled at (56476): [] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574 softirqs last enabled at (56402): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (56402): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (56393): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop1 state A): dumping space info: BTRFS info (device loop1 state A): space_info DATA+METADATA (sub-group id 0) has 720896 free, is not full BTRFS info (device loop1 state A): space_info total=3276800, used=61440, pinned=0, reserved=8192, may_use=2486272, readonly=0 zone_unusable=0 BTRFS info (device loop1 state A): space_info SYSTEM (sub-group id 0) has 0 free, is not full BTRFS info (device loop1 state A): space_info total=12451840, used=4096, pinned=0, reserved=8253440, may_use=0, readonly=4194304 zone_unusable=0 BTRFS info (device loop1 state A): global_block_rsv: size 1441792 reserved 1437696 BTRFS info (device loop1 state A): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop1 state A): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop1 state A): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop1 state A): delayed_refs_rsv: size 524288 reserved 524288 BTRFS: error (device loop1 state A) in btrfs_remove_chunk:3360: errno=-28 No space left BTRFS info (device loop1 state EA): forced readonly BTRFS info (device loop1 state EA): 1 enospc errors during balance BTRFS info (device loop1 state EA): balance: ended with status: -28