------------[ cut here ]------------ WARNING: CPU: 1 PID: 4553 at fs/btrfs/volumes.c:3265 btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265 Modules linked in: CPU: 1 PID: 4553 Comm: syz.1.16 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+0x127c/0x18d4 fs/btrfs/volumes.c:3265 lr : btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265 sp : ffff800022ae7640 x29: ffff800022ae77a0 x28: ffff0000c0629540 x27: ffff0000c0629560 x26: ffff800022ae76e0 x25: ffffffffffffffe4 x24: 1fffe000180c52b1 x23: ffff0000c062958c x22: ffff0000d88bc150 x21: dfff800000000000 x20: 0000000000000000 x19: 0000000000000006 x18: ffff800011a5bd40 x17: 1fffe00033eebd7e x16: ffff8000082d3a08 x15: 0000000040000000 x14: 0000000000000002 x13: 1ffff00002a0a0b1 x12: 0000000000ff0100 x11: ff0080000a895d54 x10: 0000000000000003 x9 : 70b9bca19a4e0d00 x8 : 70b9bca19a4e0d00 x7 : ffff8000082532dc x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff800011a5d840 x0 : ffff80018a7b9000 Call trace: btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265 btrfs_delete_unused_bgs+0xb2c/0xd84 fs/btrfs/block-group.c:1551 btrfs_remount+0xab4/0x1148 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+0xbd4/0xe78 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/0x584 fs/namespace.c:3606 __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: 2202 hardirqs last enabled at (2201): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (2201): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (2202): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (1954): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1952): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop1: state MA): dumping space info: BTRFS info (device loop1: state MA): space_info DATA+METADATA has 1794048 free, is not full BTRFS info (device loop1: state MA): space_info total=3276800, used=53248, pinned=0, reserved=4096, may_use=1425408, readonly=0 zone_unusable=0 BTRFS info (device loop1: state MA): space_info SYSTEM has 8253440 free, is not full BTRFS info (device loop1: state MA): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=0, readonly=4194304 zone_unusable=0 BTRFS info (device loop1: state MA): global_block_rsv: size 1441792 reserved 1163264 BTRFS info (device loop1: state MA): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop1: state MA): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop1: state MA): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop1: state MA): delayed_refs_rsv: size 262144 reserved 0 BTRFS: error (device loop1: state MA) in btrfs_remove_chunk:3265: errno=-28 No space left