BTRFS critical (device loop4): entry offset 8523776, bytes 8253440, bitmap no BTRFS info (device loop4): block group has cluster?: no BTRFS info (device loop4): 1 blocks of free space at or bigger than bytes is ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4538 at fs/btrfs/volumes.c:3265 btrfs_remove_chunk+0x123c/0x1864 fs/btrfs/volumes.c:3265 Modules linked in: CPU: 1 PID: 4538 Comm: syz.4.18 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 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 : ffff8000239e7700 x29: ffff8000239e7860 x28: ffff70000473cef4 x27: ffff8000239e77a0 x26: dfff800000000000 x25: ffffffffffffffe4 x24: 1fffe0001bfdbb83 x23: ffff0000dfeddc1c x22: ffff0000f2407a00 x21: ffff0000f2407a14 x20: 0000000000000000 x19: 0000000000000000 x18: ffff800011b8bf60 x17: 0000000000000000 x16: ffff8000082d9364 x15: 0000000000000002 x14: 0000000000000001 x13: 1fffe00033eac9a3 x12: 0000000000080000 x11: 000000000007ffff x10: ffff80002970f000 x9 : a8da1d2f6f2a2b00 x8 : a8da1d2f6f2a2b00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000239e7198 x4 : ffff8000152f4cc0 x3 : ffff80000853857c x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: btrfs_remove_chunk+0x123c/0x1864 fs/btrfs/volumes.c:3265 btrfs_relocate_chunk+0x24c/0x364 fs/btrfs/volumes.c:3395 __btrfs_balance+0x13b8/0x1b3c fs/btrfs/volumes.c:4098 btrfs_balance+0xa44/0xe18 fs/btrfs/volumes.c:4474 btrfs_ioctl_balance+0x3c0/0x5f8 fs/btrfs/ioctl.c:4529 btrfs_ioctl+0x95c/0xb38 fs/btrfs/ioctl.c:5568 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: 76114 hardirqs last enabled at (76113): [] __up_console_sem+0xb4/0xfc kernel/printk/printk.c:261 hardirqs last disabled at (76114): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (76034): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (76034): [] handle_softirqs+0xaec/0xc60 kernel/softirq.c:624 softirqs last disabled at (76029): [] __do_softirq+0x14/0x20 kernel/softirq.c:630 ---[ 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 1343488 free, is not full BTRFS info (device loop4: state A): space_info total=3276800, used=61440, pinned=0, reserved=8192, may_use=1863680, readonly=0 zone_unusable=0 BTRFS info (device loop4: state A): space_info SYSTEM (sub-group id 0) has 8253440 free, is not full BTRFS info (device loop4: state A): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=0, readonly=4194304 zone_unusable=0 BTRFS info (device loop4: state A): global_block_rsv: size 1441792 reserved 1437696 BTRFS info (device loop4: state A): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop4: state A): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop4: state A): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop4: state A): delayed_refs_rsv: size 524288 reserved 163840 BTRFS: error (device loop4: state A) in btrfs_remove_chunk:3265: errno=-28 No space left BTRFS info (device loop4: state EA): forced readonly BTRFS info (device loop4: state EA): 1 enospc errors during balance BTRFS info (device loop4: state EA): balance: ended with status: -28