BTRFS info (device loop5): 1 blocks of free space at or bigger than bytes is ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4985 at fs/btrfs/block-group.c:2441 btrfs_create_pending_block_groups+0x9e8/0xca8 fs/btrfs/block-group.c:2441 Modules linked in: CPU: 1 PID: 4985 Comm: syz.5.244 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 : ffff8000203a7540 x29: ffff8000203a7710 x28: ffff0000d27b9858 x27: ffff0000c530d270 x26: ffff0000c530d268 x25: ffff0000d27b9850 x24: dfff800000000000 x23: ffff0000d27b99b0 x22: 1fffe0001a4f730b x21: 1fffe0001a4f730a x20: 00000000ffffffe4 x19: ffff0000da9559d0 x18: 0000000000000001 x17: 0000000000000002 x16: ffff8000111a97c4 x15: 00000000ffffffff x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000080000 x11: 000000000007ffff x10: ffff80002c001000 x9 : 65d7d2cf046c6100 x8 : 65d7d2cf046c6100 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000203a6e38 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: 90190 hardirqs last enabled at (90189): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257 hardirqs last disabled at (90190): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (90122): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (90122): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (90099): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (90099): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (90099): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (90099): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace d38493cfe996241f ]--- BTRFS: error (device loop5) in btrfs_create_pending_block_groups:2441: errno=-28 No space left BTRFS info (device loop5): forced readonly BTRFS error (device loop5): allocation failed flags 12, wanted 4096 tree-log 0, relocation: 0 BTRFS info (device loop5): space_info 5 has 2371584 free, is full BTRFS info (device loop5): space_info total=3276800, used=49152, pinned=0, reserved=0, may_use=856064, readonly=0 zone_unusable=0 BTRFS info (device loop5): global_block_rsv: size 851968 reserved 847872 BTRFS info (device loop5): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop5): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop5): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop5): delayed_refs_rsv: size 196608 reserved 4096 BTRFS info (device loop5): block group 5242880 has 1638400 bytes, 49152 used 0 pinned 0 reserved 0 zone_unusable BTRFS critical (device loop5): entry offset 5242880, bytes 8192, bitmap no BTRFS critical (device loop5): entry offset 5271552, bytes 16384, bitmap no BTRFS critical (device loop5): entry offset 5316608, bytes 1564672, bitmap no BTRFS info (device loop5): block group has cluster?: no BTRFS info (device loop5): 3 blocks of free space at or bigger than bytes is BTRFS info (device loop5): block group 6881280 has 1638400 bytes, 0 used 0 pinned 0 reserved 0 zone_unusable BTRFS critical (device loop5): entry offset 6881280, bytes 1638400, bitmap no BTRFS info (device loop5): block group has cluster?: no BTRFS info (device loop5): 1 blocks of free space at or bigger than bytes is BTRFS: error (device loop5) in btrfs_create_pending_block_groups:2452: errno=-28 No space left BTRFS info (device loop5): balance: ended with status: -30