BTRFS info (device loop4): 0 free space entries at or bigger than 4096 bytes BTRFS info (device loop4): 4190208 bytes available across all block groups ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: CPU: 0 PID: 7326 at fs/btrfs/volumes.c:3337 btrfs_remove_chunk+0x131c/0x1804 fs/btrfs/volumes.c:3337 Modules linked in: CPU: 0 UID: 0 PID: 7326 Comm: syz.4.122 Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #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+0x131c/0x1804 fs/btrfs/volumes.c:3337 lr : btrfs_remove_chunk+0x131c/0x1804 fs/btrfs/volumes.c:3337 sp : ffff80009d997700 x29: ffff80009d997880 x28: ffff0000f1b304fc x27: dfff800000000000 x26: ffff0000f1b304a0 x25: dfff800000000000 x24: ffffffffffffffe4 x23: ffff0000d198dd38 x22: 00000000ffffffe4 x21: ffff0000d198dd00 x20: dfff800000000000 x19: 0000000000000000 x18: 1fffe0003386aa76 x17: ffff80008f31e000 x16: ffff80008adbe9e4 x15: 0000000000000001 x14: 1fffe0003386d4e8 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 0000000000000003 x9 : fab280a3488acc00 x8 : fab280a3488acc00 x7 : ffff800080485878 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b3ebc40 x0 : 0000000000000001 Call trace: btrfs_remove_chunk+0x131c/0x1804 fs/btrfs/volumes.c:3337 (P) btrfs_relocate_chunk+0x254/0x378 fs/btrfs/volumes.c:3467 __btrfs_balance+0x1308/0x1a94 fs/btrfs/volumes.c:4203 btrfs_balance+0xa44/0xe30 fs/btrfs/volumes.c:4580 btrfs_ioctl_balance+0x350/0x550 fs/btrfs/ioctl.c:3586 btrfs_ioctl+0xb04/0xc38 fs/btrfs/ioctl.c:5306 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:892 __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: 71436 hardirqs last enabled at (71435): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1525 [inline] hardirqs last enabled at (71435): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5130 hardirqs last disabled at (71436): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:511 softirqs last enabled at (70958): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (70958): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (70835): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop4 state A): dumping space info: BTRFS info (device loop4 state A): space_info DATA+METADATA has 7340032 free, is not full BTRFS info (device loop4 state A): space_info total=11534336, used=61440, pinned=0, reserved=8192, may_use=2486272, readonly=1638400 zone_unusable=0 BTRFS info (device loop4 state A): space_info SYSTEM has -98304 free, is not full BTRFS info (device loop4 state A): space_info total=4194304, used=4096, pinned=0, reserved=0, may_use=98304, readonly=4190208 zone_unusable=0 BTRFS info (device loop4 state A): global_block_rsv: size 1441792 reserved 1437696 BTRFS info (device loop4 state A): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop4 state A): chunk_block_rsv: size 98304 reserved 98304 BTRFS info (device loop4 state A): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop4 state A): delayed_refs_rsv: size 524288 reserved 524288 BTRFS: error (device loop4 state A) in btrfs_remove_chunk:3337: errno=-28 No space left BTRFS info (device loop4 state EA): forced readonly BTRFS info (device loop4 state EA): 1 enospc errors during balance BTRFS info (device loop4 state EA): balance: ended with status: -30