BTRFS info (device loop4): block group has cluster?: no BTRFS info (device loop4): 2 blocks of free space at or bigger than bytes is ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5386 at fs/btrfs/volumes.c:3265 btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265 Modules linked in: CPU: 0 PID: 5386 Comm: syz.4.208 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 : ffff8000211b7700 x29: ffff8000211b7860 x28: ffff0000e20ef540 x27: ffff0000e20ef560 x26: ffff8000211b77a0 x25: ffffffffffffffe4 x24: 1fffe0001c41deb1 x23: ffff0000e20ef58c x22: ffff0000f28e5150 x21: dfff800000000000 x20: 0000000000000000 x19: 0000000000000000 x18: ffff800011abbcc0 x17: 1fffe00033ed797e x16: ffff8000082d22e0 x15: 0000000040000000 x14: 0000000000000002 x13: 1ffff00002a180b1 x12: 0000000000ff0100 x11: ff0080000a893b54 x10: 0000000000000003 x9 : 810e4ec3c0191300 x8 : 810e4ec3c0191300 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: 79756 hardirqs last enabled at (79755): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (79755): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (79756): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (79666): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (79666): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:624 softirqs last disabled at (79651): [] __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 7962624 free, is not full BTRFS info (device loop4: state A): space_info total=11534336, used=61440, pinned=0, reserved=8192, may_use=1863680, readonly=1638400 zone_unusable=0 BTRFS info (device loop4: state A): space_info SYSTEM has 4190208 free, is not full BTRFS info (device loop4: state A): space_info total=4194304, used=4096, pinned=0, reserved=0, may_use=0, readonly=0 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: -30