------------[ cut here ]------------ WARNING: CPU: 0 PID: 4971 at fs/btrfs/volumes.c:3265 btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265 Modules linked in: CPU: 0 PID: 4971 Comm: syz.2.123 Not tainted 6.1.143-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 60400005 (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 : ffff800021017640 x29: ffff8000210177a0 x28: ffff0000e039c498 x27: ffff0000e039c4b8 x26: ffff8000210176e0 x25: ffffffffffffffe4 x24: 1fffe0001c07389c x23: ffff0000e039c4e4 x22: ffff0000cfc8b150 x21: dfff800000000000 x20: 0000000000000000 x19: 0000000000000006 x18: ffff800011aabce0 x17: 0000000000000000 x16: ffff8000082d2400 x15: 0000000000000002 x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000080000 x11: 0000000000044531 x10: ffff80002707d000 x9 : 2494dcd227ef1500 x8 : 2494dcd227ef1500 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000210170d8 x4 : ffff800015194800 x3 : ffff80000852e344 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265 btrfs_delete_unused_bgs+0xa1c/0xc74 fs/btrfs/block-group.c:1528 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:2714 [inline] path_mount+0xbd4/0xe78 fs/namespace.c:3380 do_mount fs/namespace.c:3401 [inline] __do_sys_mount fs/namespace.c:3609 [inline] __se_sys_mount fs/namespace.c:3586 [inline] __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3586 __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: 1022 hardirqs last enabled at (1021): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261 hardirqs last disabled at (1022): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (812): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (810): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop2: state MA): dumping space info: BTRFS info (device loop2: state MA): space_info DATA+METADATA has 1519616 free, is not full BTRFS info (device loop2: state MA): space_info total=3276800, used=53248, pinned=0, reserved=4096, may_use=1699840, readonly=0 zone_unusable=0 BTRFS info (device loop2: state MA): space_info SYSTEM has 8253440 free, is not full BTRFS info (device loop2: state MA): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=0, readonly=4194304 zone_unusable=0 BTRFS info (device loop2: state MA): global_block_rsv: size 1441792 reserved 1437696 BTRFS info (device loop2: state MA): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop2: state MA): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop2: state MA): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop2: state MA): delayed_refs_rsv: size 262144 reserved 0 BTRFS: error (device loop2: state MA) in btrfs_remove_chunk:3265: errno=-28 No space left