------------[ cut here ]------------
WARNING: CPU: 0 PID: 136 at fs/btrfs/block-group.c:3509 do_chunk_alloc fs/btrfs/block-group.c:3509 [inline]
WARNING: CPU: 0 PID: 136 at fs/btrfs/block-group.c:3509 btrfs_chunk_alloc+0xa70/0xeb4 fs/btrfs/block-group.c:3732
Modules linked in:
CPU: 0 PID: 136 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Workqueue: events_unbound btrfs_async_reclaim_metadata_space
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : do_chunk_alloc fs/btrfs/block-group.c:3509 [inline]
pc : btrfs_chunk_alloc+0xa70/0xeb4 fs/btrfs/block-group.c:3732
lr : do_chunk_alloc fs/btrfs/block-group.c:3509 [inline]
lr : btrfs_chunk_alloc+0xa70/0xeb4 fs/btrfs/block-group.c:3732
sp : ffff80001bdc6950
x29: ffff80001bdc69a0 x28: 1fffe0001bd19a61 x27: ffff0000de8cd30b
x26: ffffffffffffffe4 x25: dfff800000000000 x24: ffff0000de8cd2c0
x23: ffff0000e48a0000 x22: ffff0000c1ed0084 x21: ffff0000e36cf800
x20: ffff0000c1ed0000 x19: ffff0000c1ed0088 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000111ceed0 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : 414b5744366ded00
x8 : 414b5744366ded00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001bdc6238 x4 : ffff80001426f5a0 x3 : ffff8000085043fc
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026
Call trace:
 do_chunk_alloc fs/btrfs/block-group.c:3509 [inline]
 btrfs_chunk_alloc+0xa70/0xeb4 fs/btrfs/block-group.c:3732
 find_free_extent_update_loop fs/btrfs/extent-tree.c:4054 [inline]
 find_free_extent+0x23ec/0x316c fs/btrfs/extent-tree.c:4417
 btrfs_reserve_extent+0x194/0x428 fs/btrfs/extent-tree.c:4498
 cow_file_range+0x50c/0x9cc fs/btrfs/inode.c:1181
 btrfs_run_delalloc_range+0x318/0x119c fs/btrfs/inode.c:2018
 writepage_delalloc+0x124/0x320 fs/btrfs/extent_io.c:3809
 __extent_writepage+0x60c/0xbfc fs/btrfs/extent_io.c:4115
 extent_write_cache_pages fs/btrfs/extent_io.c:5037 [inline]
 extent_writepages+0x8f4/0x10b4 fs/btrfs/extent_io.c:5164
 btrfs_writepages+0x28/0x38 fs/btrfs/inode.c:8646
 do_writepages+0x36c/0x578 mm/page-writeback.c:2386
 filemap_fdatawrite_wbc+0x1d4/0x234 mm/filemap.c:400
 start_delalloc_inodes+0x588/0x91c fs/btrfs/inode.c:10142
 btrfs_start_delalloc_roots+0x494/0x680 fs/btrfs/inode.c:10221
 shrink_delalloc fs/btrfs/space-info.c:538 [inline]
 flush_space+0x52c/0xbd8 fs/btrfs/space-info.c:646
 btrfs_async_reclaim_metadata_space+0x678/0x7b0 fs/btrfs/space-info.c:953
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:856
irq event stamp: 9542846
hardirqs last  enabled at (9542845): [<ffff8000082f8fcc>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257
hardirqs last disabled at (9542846): [<ffff8000111ca730>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (9542712): [<ffff800010f4d300>] spin_unlock_bh include/linux/spinlock.h:409 [inline]
softirqs last  enabled at (9542712): [<ffff800010f4d300>] batadv_nc_purge_paths+0x308/0x390 net/batman-adv/network-coding.c:475
softirqs last disabled at (9542710): [<ffff800010f4d0c8>] spin_lock_bh include/linux/spinlock.h:369 [inline]
softirqs last disabled at (9542710): [<ffff800010f4d0c8>] batadv_nc_purge_paths+0xd0/0x390 net/batman-adv/network-coding.c:446
---[ end trace 04cbd2a332653852 ]---
BTRFS: error (device loop3) in do_chunk_alloc:3509: errno=-28 No space left
BTRFS info (device loop3): forced readonly