BTRFS info (device loop4): 0 free space entries at or bigger than 4096 bytes BTRFS info (device loop4): 4194304 bytes available across all block groups ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: CPU: 0 PID: 6702 at fs/btrfs/volumes.c:3360 btrfs_remove_chunk+0x1718/0x1ee0 fs/btrfs/volumes.c:3360 Modules linked in: CPU: 0 UID: 0 PID: 6702 Comm: syz.4.12 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 : ffff80009ee07700 x29: ffff80009ee07880 x28: dfff800000000000 x27: ffff80009ee07780 x26: ffff700013dc0ef0 x25: dfff800000000000 x24: ffff0000d22e5800 x23: ffffffffffffffe4 x22: dfff800000000000 x21: ffff0000c15dd5c8 x20: 0000000000000000 x19: 0000000000000000 x18: 00000000ffffffff x17: 6c62206c6c612073 x16: ffff80008b0156e8 x15: 0000000000000001 x14: 1ffff00013dc0e50 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 000000000007ffff x9 : 91a7ca6fbeb36200 x8 : 91a7ca6fbeb36200 x7 : ffff800080563530 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807de538 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+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 59050 hardirqs last enabled at (59049): [] irqentry_exit+0xd8/0x108 kernel/entry/common.c:214 hardirqs last disabled at (59050): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (58590): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (58588): [] 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 720896 free, is not full BTRFS info (device loop4 state A): space_info total=3276800, used=61440, pinned=0, reserved=8192, may_use=2486272, 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 524288 BTRFS: error (device loop4 state A) in btrfs_remove_chunk:3360: 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