BTRFS error (device loop0): allocation failed flags 2, wanted 4096 tree-log 0, relocation: 0 BTRFS critical (device loop0): entry offset 1048576, bytes 4194304, bitmap no ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: CPU: 0 PID: 7507 at fs/btrfs/volumes.c:3365 btrfs_remove_chunk+0x14a8/0x1e0c fs/btrfs/volumes.c:3365 Modules linked in: CPU: 0 UID: 0 PID: 7507 Comm: syz.0.32 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_remove_chunk+0x14a8/0x1e0c fs/btrfs/volumes.c:3365 lr : btrfs_remove_chunk+0x14a8/0x1e0c fs/btrfs/volumes.c:3365 sp : ffff80009bbc7700 x29: ffff80009bbc7880 x28: dfff800000000000 x27: ffff80009bbc7780 x26: ffff700013778ef0 x25: dfff800000000000 x24: ffff0000c5bf6c00 x23: ffffffffffffffe4 x22: dfff800000000000 x21: ffff0000dd34c000 x20: 0000000000000000 x19: 0000000000000000 x18: 1fffe000337db690 x17: 3334393134207365 x16: ffff800082deb6c0 x15: 0000000000000001 x14: 1fffe000337db6fa x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000337db6fb x10: 0000000000ff0100 x9 : c8beb852ee48bf00 x8 : c8beb852ee48bf00 x7 : ffff800080564a40 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807d5f04 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: btrfs_remove_chunk+0x14a8/0x1e0c fs/btrfs/volumes.c:3365 (P) btrfs_relocate_chunk+0x258/0x54c fs/btrfs/volumes.c:3496 __btrfs_balance+0x1358/0x1d30 fs/btrfs/volumes.c:4227 btrfs_balance+0x8cc/0xf58 fs/btrfs/volumes.c:4604 btrfs_ioctl_balance+0x350/0x550 fs/btrfs/ioctl.c:3577 btrfs_ioctl+0xb04/0xc3c fs/btrfs/ioctl.c:5313 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+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 49810 hardirqs last enabled at (49809): [] vprintk_store+0x898/0xac8 kernel/printk/printk.c:2329 hardirqs last disabled at (49810): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (49544): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (49542): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- BTRFS: error (device loop0 state A) in btrfs_remove_chunk:3365: errno=-28 No space left