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: 0 PID: 4987 at fs/btrfs/volumes.c:3265 btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265 Modules linked in: CPU: 0 PID: 4987 Comm: syz.4.162 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265 lr : btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265 sp : ffff800020e77700 x29: ffff800020e77860 x28: ffff0000e0adf540 x27: ffff0000e0adf560 x26: ffff800020e777a0 x25: ffffffffffffffe4 x24: 1fffe0001c15beb1 x23: ffff0000e0adf58c x22: ffff0000d1cce150 x21: dfff800000000000 x20: 0000000000000000 x19: 0000000000000000 x18: ffff800011abbcc0 x17: 1fffe00033ed797e x16: ffff8000082d22e0 x15: 0000000040000000 x14: 0000000000000002 x13: 1ffff00002a180b1 x12: 0000000000ff0100 x11: ff0080000a893128 x10: 0000000000000003 x9 : 2fff110c51081b00 x8 : 2fff110c51081b00 x7 : ffff800008251e10 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff800011abd7c0 x0 : ffff80018a6a7000 Call trace: btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265 btrfs_relocate_chunk+0x24c/0x364 fs/btrfs/volumes.c:3395 __btrfs_balance+0x1390/0x1af8 fs/btrfs/volumes.c:4098 btrfs_balance+0xa44/0xe20 fs/btrfs/volumes.c:4474 btrfs_ioctl_balance+0x3c0/0x5f8 fs/btrfs/ioctl.c:4531 btrfs_ioctl+0xac4/0xbd0 fs/btrfs/ioctl.c:5570 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+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 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: 81608 hardirqs last enabled at (81607): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (81607): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (81608): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (81556): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (81556): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:624 softirqs last disabled at (81525): [] __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 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 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