BTRFS info (device loop6: state M): block group has cluster?: no BTRFS info (device loop6: state M): 1 blocks of free space at or bigger than bytes is ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7032 at fs/btrfs/volumes.c:3265 btrfs_remove_chunk+0x123c/0x1864 fs/btrfs/volumes.c:3265 Modules linked in: CPU: 0 PID: 7032 Comm: syz.6.657 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 : ffff800024f87640 x29: ffff800024f877a0 x28: ffff7000049f0edc x27: ffff800024f876e0 x26: dfff800000000000 x25: ffffffffffffffe4 x24: 1fffe000180c96f0 x23: ffff0000c064b784 x22: ffff0000cd867900 x21: ffff0000cd867914 x20: 0000000000000000 x19: 0000000000000006 x18: ffff800011b7bf60 x17: 1fffe00033eaab7e x16: ffff8000082d9364 x15: 0000000040000000 x14: 0000000000000001 x13: 1fffe00033ead230 x12: 0000000000ff0100 x11: ff0080000a8d8624 x10: 0000000000000003 x9 : b82d5852cb096300 x8 : b82d5852cb096300 x7 : ffff80000825796c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff800011b7da80 x0 : ffff80018a400000 Call trace: btrfs_remove_chunk+0x123c/0x1864 fs/btrfs/volumes.c:3265 btrfs_delete_unused_bgs+0xb30/0xd90 fs/btrfs/block-group.c:1551 btrfs_remount+0xad0/0x1150 fs/btrfs/super.c:2075 legacy_reconfigure+0xf8/0x110 fs/fs_context.c:655 reconfigure_super+0x1d4/0x79c fs/super.c:977 do_remount fs/namespace.c:2741 [inline] path_mount+0xbdc/0xe80 fs/namespace.c:3400 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x49c/0x59c fs/namespace.c:3606 __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: 1448 hardirqs last enabled at (1447): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline] hardirqs last enabled at (1447): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5004 hardirqs last disabled at (1448): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (1378): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (1378): [] handle_softirqs+0xaec/0xc60 kernel/softirq.c:624 softirqs last disabled at (1363): [] __do_softirq+0x14/0x20 kernel/softirq.c:630 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop6: state MA): dumping space info: BTRFS info (device loop6: state MA): space_info DATA+METADATA has 1982464 free, is not full BTRFS info (device loop6: state MA): space_info total=3276800, used=49152, pinned=0, reserved=4096, may_use=1241088, readonly=0 zone_unusable=0 BTRFS info (device loop6: state MA): space_info SYSTEM has 8155136 free, is not full BTRFS info (device loop6: state MA): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=98304, readonly=4194304 zone_unusable=0 BTRFS info (device loop6: state MA): global_block_rsv: size 983040 reserved 978944 BTRFS info (device loop6: state MA): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop6: state MA): chunk_block_rsv: size 98304 reserved 98304 BTRFS info (device loop6: state MA): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop6: state MA): delayed_refs_rsv: size 131072 reserved 0 BTRFS: error (device loop6: state MA) in btrfs_remove_chunk:3265: errno=-28 No space left