BTRFS info (device loop0 state M): 0 free space entries at or bigger than 4096 bytes BTRFS info (device loop0 state M): 12447744 bytes available across all block groups ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: CPU: 0 PID: 7258 at fs/btrfs/volumes.c:3346 btrfs_remove_chunk+0x1408/0x18ec fs/btrfs/volumes.c:3346 Modules linked in: CPU: 0 UID: 0 PID: 7258 Comm: syz.0.145 Not tainted 6.16.0-rc1-syzkaller-g19272b37aa4f #0 PREEMPT 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+0x1408/0x18ec fs/btrfs/volumes.c:3346 lr : btrfs_remove_chunk+0x1408/0x18ec fs/btrfs/volumes.c:3346 sp : ffff8000a1c47660 x29: ffff8000a1c477e0 x28: dfff800000000000 x27: ffff8000a1c476e0 x26: ffff700014388edc x25: dfff800000000000 x24: ffffffffffffffe4 x23: ffff0000c9000a00 x22: 00000000ffffffe4 x21: ffff0000c1577128 x20: dfff800000000000 x19: 0000000000000000 x18: 00000000ffffffff x17: 0000000000000000 x16: ffff80008adbe648 x15: ffff700011ebc1d4 x14: 1ffff00011ebc1d4 x13: 0000000000000004 x12: ffffffffffffffff x11: ffff700011ebc1d4 x10: 0000000000ff0100 x9 : cd3f83ccbb612000 x8 : cd3f83ccbb612000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000a1c46fb8 x4 : ffff80008f657060 x3 : ffff800080548b48 x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: btrfs_remove_chunk+0x1408/0x18ec fs/btrfs/volumes.c:3346 (P) btrfs_delete_unused_bgs+0x9ac/0xc00 fs/btrfs/block-group.c:1698 btrfs_remount_ro fs/btrfs/super.c:1352 [inline] btrfs_reconfigure+0x900/0x2420 fs/btrfs/super.c:1533 reconfigure_super+0x1d4/0x6f0 fs/super.c:1075 do_remount fs/namespace.c:3369 [inline] path_mount+0xb34/0xde0 fs/namespace.c:4201 do_mount fs/namespace.c:4222 [inline] __do_sys_mount fs/namespace.c:4433 [inline] __se_sys_mount fs/namespace.c:4410 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4410 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 1724 hardirqs last enabled at (1723): [] __up_console_sem kernel/printk/printk.c:344 [inline] hardirqs last enabled at (1723): [] __console_unlock+0x70/0xc4 kernel/printk/printk.c:2885 hardirqs last disabled at (1724): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:511 softirqs last enabled at (1180): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1178): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop0 state MA): dumping space info: BTRFS info (device loop0 state MA): space_info DATA+METADATA (sub-group id 0) has 995328 free, is full BTRFS info (device loop0 state MA): space_info total=3276800, used=53248, pinned=0, reserved=4096, may_use=2224128, readonly=0 zone_unusable=0 BTRFS info (device loop0 state MA): space_info SYSTEM (sub-group id 0) has 8253440 free, is not full BTRFS info (device loop0 state MA): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=0, readonly=4194304 zone_unusable=0 BTRFS info (device loop0 state MA): global_block_rsv: size 1441792 reserved 1437696 BTRFS info (device loop0 state MA): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop0 state MA): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0 state MA): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0 state MA): delayed_refs_rsv: size 262144 reserved 262144 BTRFS: error (device loop0 state MA) in btrfs_remove_chunk:3346: errno=-28 No space left