BTRFS info (device loop0): relocating block group 1048576 flags system ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4585 at fs/btrfs/volumes.c:3265 btrfs_remove_chunk+0x1288/0x1900 fs/btrfs/volumes.c:3265 Modules linked in: CPU: 0 PID: 4585 Comm: syz.0.56 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : btrfs_remove_chunk+0x1288/0x1900 fs/btrfs/volumes.c:3265 lr : btrfs_remove_chunk+0x1288/0x1900 fs/btrfs/volumes.c:3265 sp : ffff8000215a7740 x29: ffff8000215a78a0 x28: dfff800000000000 x27: ffff0000dfbfbdc8 x26: ffff0000f6ca8028 x25: ffff0000f5d04000 x24: ffffffffffffffe4 x23: 1fffe0001ed95004 x22: ffff0000f5d05a10 x21: ffff0000f788ff00 x20: 0000000000000000 x19: 0000000000000000 x18: 1fffe00033e7ff7e x17: 0000000000000000 x16: ffff800011b3e320 x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe00033e7ffa3 x12: 0000000000080000 x11: 000000000007ffff x10: ffff800021fd9000 x9 : a456cba74dc68d00 x8 : a456cba74dc68d00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000215a71d8 x4 : ffff800015414e60 x3 : ffff8000085404d8 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: btrfs_remove_chunk+0x1288/0x1900 fs/btrfs/volumes.c:3265 btrfs_relocate_chunk+0x254/0x36c fs/btrfs/volumes.c:3395 __btrfs_balance+0x13e0/0x1b84 fs/btrfs/volumes.c:4104 btrfs_balance+0x9f8/0xdd4 fs/btrfs/volumes.c:4480 btrfs_ioctl_balance+0x3c8/0x600 fs/btrfs/ioctl.c:4537 btrfs_ioctl+0x95c/0xb38 fs/btrfs/ioctl.c:5594 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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: 79986 hardirqs last enabled at (79985): [] __up_console_sem+0xb4/0xfc kernel/printk/printk.c:261 hardirqs last disabled at (79986): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (79792): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (79792): [] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624 softirqs last disabled at (79787): [] __do_softirq+0x14/0x20 kernel/softirq.c:630 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop0: state A): dumping space info: BTRFS info (device loop0: state A): space_info DATA+METADATA (sub-group id 0) has 1343488 free, is not full BTRFS info (device loop0: state A): space_info total=3276800, used=61440, pinned=0, reserved=8192, may_use=1863680, readonly=0 zone_unusable=0 BTRFS info (device loop0: state A): space_info SYSTEM (sub-group id 0) has 8253440 free, is not full BTRFS info (device loop0: state A): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=0, readonly=4194304 zone_unusable=0 BTRFS info (device loop0: state A): global_block_rsv: size 1441792 reserved 1437696 BTRFS info (device loop0: state A): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop0: state A): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0: state A): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0: state A): delayed_refs_rsv: size 524288 reserved 163840 BTRFS: error (device loop0: state A) in btrfs_remove_chunk:3265: errno=-28 No space left BTRFS info (device loop0: state EA): forced readonly BTRFS info (device loop0: state EA): 1 enospc errors during balance BTRFS info (device loop0: state EA): balance: ended with status: -28