BTRFS info (device loop2): balance: start -s ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: fs/btrfs/block-group.c:2790 at btrfs_create_pending_block_groups+0xe80/0x1514 fs/btrfs/block-group.c:2790, CPU#1: syz.2.262/8190 Modules linked in: CPU: 1 UID: 0 PID: 8190 Comm: syz.2.262 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : btrfs_create_pending_block_groups+0xe80/0x1514 fs/btrfs/block-group.c:2790 lr : btrfs_create_pending_block_groups+0xe80/0x1514 fs/btrfs/block-group.c:2790 sp : ffff80009c8274c0 x29: ffff80009c8276f0 x28: 1fffe00019d5fe14 x27: ffff0000ceaff050 x26: 1fffe00019d5fe0b x25: ffff0000ceaff058 x24: ffff0000e03db9a0 x23: dfff800000000000 x22: ffff0000f75f8000 x21: 0000000000000000 x20: 0000000000000000 x19: 00000000ffffffe4 x18: 1fffe00033781890 x17: 0000000000000000 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1fffe0001b896bd0 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 0000000000000003 x9 : 350ce864c3807b00 x8 : 350ce864c3807b00 x7 : ffff80008049ea88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008049046c x2 : 0000000000000001 x1 : ffff80008b5a9ce0 x0 : 0000000000000001 Call trace: btrfs_create_pending_block_groups+0xe80/0x1514 fs/btrfs/block-group.c:2790 (P) __btrfs_end_transaction+0x134/0x5f4 fs/btrfs/transaction.c:1078 btrfs_end_transaction+0x24/0x34 fs/btrfs/transaction.c:1117 btrfs_inc_block_group_ro+0x584/0x628 fs/btrfs/block-group.c:3086 btrfs_relocate_block_group+0x314/0xac4 fs/btrfs/relocation.c:3923 btrfs_relocate_chunk+0x108/0x54c fs/btrfs/volumes.c:3424 __btrfs_balance+0x1334/0x1d1c fs/btrfs/volumes.c:4197 btrfs_balance+0x8cc/0xf58 fs/btrfs/volumes.c:4571 btrfs_ioctl_balance+0x350/0x550 fs/btrfs/ioctl.c:3525 btrfs_ioctl+0xb04/0xc3c fs/btrfs/ioctl.c:5276 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 1838 hardirqs last enabled at (1837): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (1837): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (1838): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (1352): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1350): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop2 state A): dumping space info: BTRFS info (device loop2 state A): space_info DATA+METADATA (sub-group id 0) has 2240512 free, is full BTRFS info (device loop2 state A): space_info total=3276800, used=49152, pinned=0, reserved=0, may_use=987136, readonly=0 zone_unusable=0 BTRFS info (device loop2 state A): space_info SYSTEM (sub-group id 0) has 8253440 free, is not full BTRFS info (device loop2 state A): space_info total=12451840, used=4096, pinned=0, reserved=4096, may_use=0, readonly=4190208 zone_unusable=0 BTRFS info (device loop2 state A): global_block_rsv: size 983040 reserved 983040 BTRFS info (device loop2 state A): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop2 state A): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop2 state A): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop2 state A): delayed_refs_rsv: size 196608 reserved 4096 BTRFS: error (device loop2 state A) in btrfs_create_pending_block_groups:2790: errno=-28 No space left BTRFS info (device loop2 state EA): forced readonly BTRFS: error (device loop2 state EA) in btrfs_create_pending_block_groups:2802: errno=-28 No space left BTRFS info (device loop2 state EA): balance: ended with status: -30