BTRFS info (device loop0): has skinny extents
BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): balance: start -s
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4723 at fs/btrfs/block-group.c:2441 btrfs_create_pending_block_groups+0xa8c/0xd1c fs/btrfs/block-group.c:2441
Modules linked in:
CPU: 1 PID: 4723 Comm: syz.0.16 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : btrfs_create_pending_block_groups+0xa8c/0xd1c fs/btrfs/block-group.c:2441
lr : btrfs_create_pending_block_groups+0xa8c/0xd1c fs/btrfs/block-group.c:2441
sp : ffff80001ff17560
x29: ffff80001ff17720 x28: dfff800000000000 x27: ffff0000dea9d000
x26: 1fffe00019a69d0b x25: ffff0000cd34e858 x24: 1fffe00019a69d0a
x23: ffff0000cd34e850 x22: 00000000ffffffe4 x21: ffff0000cd34e9b0
x20: ffff0000ee0a19d0 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80001135f958 x15: 0000000000000000
x14: 0000000000000001 x13: 1fffe000341d09ab x12: 0000000000000000
x11: ff80800008300a38 x10: 0000000000000000 x9 : 72933e8f8a8f8c00
x8 : 72933e8f8a8f8c00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001ff16e78 x4 : ffff80001447f520 x3 : ffff80000850fcd0
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026
Call trace:
 btrfs_create_pending_block_groups+0xa8c/0xd1c fs/btrfs/block-group.c:2441
 __btrfs_end_transaction+0x148/0x5fc fs/btrfs/transaction.c:1017
 btrfs_end_transaction+0x24/0x34 fs/btrfs/transaction.c:1053
 btrfs_inc_block_group_ro+0x4f0/0x568 fs/btrfs/block-group.c:2664
 btrfs_relocate_block_group+0x2c8/0x89c fs/btrfs/relocation.c:4074
 btrfs_relocate_chunk+0xb8/0x284 fs/btrfs/volumes.c:3338
 __btrfs_balance+0x1214/0x1c44 fs/btrfs/volumes.c:4085
 btrfs_balance+0xad0/0x10f8 fs/btrfs/volumes.c:4475
 btrfs_ioctl_balance+0x4d4/0x660 fs/btrfs/ioctl.c:4151
 btrfs_ioctl+0x20c/0xa8c 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+0x98/0x28c arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1d0 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: 81358
hardirqs last  enabled at (81357): [<ffff8000082feda8>] __up_console_sem+0xb4/0xfc kernel/printk/printk.c:257
hardirqs last disabled at (81358): [<ffff80001135b320>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (80730): [<ffff80000803206c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (80728): [<ffff800008032038>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace a5c2d28934b2c9ce ]---
BTRFS: error (device loop0) in btrfs_create_pending_block_groups:2441: errno=-28 No space left
BTRFS info (device loop0): forced readonly
BTRFS: error (device loop0) in btrfs_create_pending_block_groups:2452: errno=-28 No space left
BTRFS: error (device loop0) in add_block_group_free_space:1315: errno=-28 No space left
BTRFS info (device loop0): balance: ended with status: -30