------------[ cut here ]------------ WARNING: CPU: 0 PID: 4736 at fs/btrfs/volumes.c:3259 btrfs_remove_chunk+0x1158/0x17b0 fs/btrfs/volumes.c:3259 Modules linked in: CPU: 0 PID: 4736 Comm: syz.2.66 Not tainted 6.1.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : btrfs_remove_chunk+0x1158/0x17b0 fs/btrfs/volumes.c:3259 lr : btrfs_remove_chunk+0x1158/0x17b0 fs/btrfs/volumes.c:3259 sp : ffff800022e67640 x29: ffff800022e677a0 x28: ffff0000df56cd20 x27: 0000000000000001 x26: ffff800022e676e0 x25: ffffffffffffffe4 x24: 1fffe0001bead9ad x23: ffff0000df56cd6c x22: 0000000000100000 x21: dfff800000000000 x20: 0000000000000000 x19: 0000000000000006 x18: ffff800011a7bd00 x17: 1fffe00033ee2f76 x16: ffff8000082d1408 x15: 0000000040000002 x14: 0000000000000002 x13: 1ffff00002a0e0b1 x12: 0000000000ff0100 x11: ff0080000a888cd4 x10: 0000000000000003 x9 : 848d82d9fd4be400 x8 : 848d82d9fd4be400 x7 : ffff800008250ee4 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff800011a7d800 x0 : ffff80018a752000 Call trace: btrfs_remove_chunk+0x1158/0x17b0 fs/btrfs/volumes.c:3259 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:2713 [inline] path_mount+0xbd4/0xe78 fs/namespace.c:3379 do_mount fs/namespace.c:3400 [inline] __do_sys_mount fs/namespace.c:3608 [inline] __se_sys_mount fs/namespace.c:3585 [inline] __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3585 __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: 1462 hardirqs last enabled at (1461): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (1461): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (1462): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (1448): [] softirq_handle_end kernel/softirq.c:421 [inline] softirqs last enabled at (1448): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:606 softirqs last disabled at (1431): [] __do_softirq+0x14/0x20 kernel/softirq.c:612 ---[ 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:3259: errno=-28 No space left