BTRFS info (device loop4): balance: start -susage=34359738372,drange=7..526336,limit=0..6 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4661 at fs/btrfs/block-group.c:2441 btrfs_create_pending_block_groups+0x9e8/0xca8 fs/btrfs/block-group.c:2441 Modules linked in: CPU: 0 PID: 4661 Comm: syz.4.197 Not tainted 5.15.185-syzkaller #0 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_create_pending_block_groups+0x9e8/0xca8 fs/btrfs/block-group.c:2441 lr : btrfs_create_pending_block_groups+0x9e8/0xca8 fs/btrfs/block-group.c:2441 sp : ffff80001fbc7540 x29: ffff80001fbc7710 x28: ffff0000ed39b858 x27: ffff0000e9e621c0 x26: ffff0000e9e621b8 x25: ffff0000ed39b850 x24: dfff800000000000 x23: ffff0000ed39b9b0 x22: 1fffe0001da7370b x21: 1fffe0001da7370a x20: 00000000ffffffe4 x19: ffff0000d44559d0 x18: 0000000000000001 x17: 0000000000000002 x16: ffff8000111a97c4 x15: 00000000ffffffff x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000080000 x11: 0000000000060f28 x10: ffff800023b09000 x9 : efb3aec15beaf600 x8 : efb3aec15beaf600 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80001fbc6e38 x4 : ffff80001423f280 x3 : ffff800008503958 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 Call trace: btrfs_create_pending_block_groups+0x9e8/0xca8 fs/btrfs/block-group.c:2441 __btrfs_end_transaction+0x13c/0x608 fs/btrfs/transaction.c:1016 btrfs_end_transaction+0x24/0x34 fs/btrfs/transaction.c:1052 btrfs_inc_block_group_ro+0x4ec/0x558 fs/btrfs/block-group.c:2664 btrfs_relocate_block_group+0x2b8/0x8a4 fs/btrfs/relocation.c:4041 btrfs_relocate_chunk+0xb8/0x280 fs/btrfs/volumes.c:3332 __btrfs_balance+0x1170/0x1ba4 fs/btrfs/volumes.c:4073 btrfs_balance+0xac4/0x1138 fs/btrfs/volumes.c:4463 btrfs_ioctl_balance+0x4cc/0x658 fs/btrfs/ioctl.c:4152 btrfs_ioctl+0x8d0/0xb38 fs/btrfs/ioctl.c:5012 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 84016 hardirqs last enabled at (84015): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257 hardirqs last disabled at (84016): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (83306): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (83304): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 ---[ end trace 040d14851f6b0d93 ]--- BTRFS: error (device loop4) in btrfs_create_pending_block_groups:2441: errno=-28 No space left BTRFS info (device loop4): forced readonly BTRFS: error (device loop4) in btrfs_create_pending_block_groups:2452: errno=-28 No space left BTRFS info (device loop4): balance: ended with status: -30