------------[ cut here ]------------
WARNING: CPU: 0 PID: 1765 at fs/btrfs/block-group.c:3494 do_chunk_alloc fs/btrfs/block-group.c:3494 [inline]
WARNING: CPU: 0 PID: 1765 at fs/btrfs/block-group.c:3494 btrfs_chunk_alloc+0x8f8/0xcdc fs/btrfs/block-group.c:3717
Modules linked in:
CPU: 0 PID: 1765 Comm: kworker/u4:7 Not tainted 5.15.162-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: events_unbound btrfs_async_reclaim_metadata_space
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : do_chunk_alloc fs/btrfs/block-group.c:3494 [inline]
pc : btrfs_chunk_alloc+0x8f8/0xcdc fs/btrfs/block-group.c:3717
lr : do_chunk_alloc fs/btrfs/block-group.c:3494 [inline]
lr : btrfs_chunk_alloc+0x8f8/0xcdc fs/btrfs/block-group.c:3717
sp : ffff800021756660
x29: ffff8000217566c0 x28: ffff0000dc0872c0 x27: 0000000000000005
x26: ffffffffffffffe4 x25: ffff0000dc08730b x24: ffff0000d5f90868
x23: 00000000ffffffe4 x22: 1fffe0001b810e63 x21: ffff0000d0fb7000
x20: dfff800000000000 x19: ffff0000c85e4800 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000119a6548 x15: 00000000ffffffff
x14: ffff0000ce0a8000 x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : 0bcf8cd24317a300
x8 : 0bcf8cd24317a300 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800021755dd8 x4 : ffff800014a2f7e0 x3 : ffff8000085504d8
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026
Call trace:
 do_chunk_alloc fs/btrfs/block-group.c:3494 [inline]
 btrfs_chunk_alloc+0x8f8/0xcdc fs/btrfs/block-group.c:3717
 find_free_extent_update_loop fs/btrfs/extent-tree.c:4039 [inline]
 find_free_extent+0x324c/0x44e8 fs/btrfs/extent-tree.c:4402
 btrfs_reserve_extent+0x1b4/0x43c fs/btrfs/extent-tree.c:4483
 cow_file_range+0x4f0/0xb74 fs/btrfs/inode.c:1181
 btrfs_run_delalloc_range+0x314/0x12cc fs/btrfs/inode.c:2018
 writepage_delalloc+0x1d4/0x434 fs/btrfs/extent_io.c:3802
 __extent_writepage+0x624/0xcbc fs/btrfs/extent_io.c:4108
 extent_write_cache_pages fs/btrfs/extent_io.c:5030 [inline]
 extent_writepages+0x9b0/0x1268 fs/btrfs/extent_io.c:5157
 btrfs_writepages+0x28/0x38 fs/btrfs/inode.c:8623
 do_writepages+0x39c/0x5ec mm/page-writeback.c:2364
 filemap_fdatawrite_wbc+0x1c8/0x228 mm/filemap.c:400
 start_delalloc_inodes+0x630/0xa30 fs/btrfs/inode.c:10119
 btrfs_start_delalloc_roots+0x5e4/0x898 fs/btrfs/inode.c:10198
 shrink_delalloc fs/btrfs/space-info.c:538 [inline]
 flush_space+0x5b0/0xc94 fs/btrfs/space-info.c:646
 btrfs_async_reclaim_metadata_space+0x6c8/0x80c fs/btrfs/space-info.c:953
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
irq event stamp: 426858
hardirqs last  enabled at (426857): [<ffff80000832b6a8>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257
hardirqs last disabled at (426858): [<ffff8000119a1bd4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (426622): [<ffff8000117c9854>] spin_unlock_bh include/linux/spinlock.h:408 [inline]
softirqs last  enabled at (426622): [<ffff8000117c9854>] batadv_nc_purge_paths+0x308/0x38c net/batman-adv/network-coding.c:475
softirqs last disabled at (426620): [<ffff8000117c961c>] spin_lock_bh include/linux/spinlock.h:368 [inline]
softirqs last disabled at (426620): [<ffff8000117c961c>] batadv_nc_purge_paths+0xd0/0x38c net/batman-adv/network-coding.c:446
---[ end trace 8d55de1dcc84df47 ]---
BTRFS: error (device loop4) in do_chunk_alloc:3494: errno=-28 No space left
BTRFS info (device loop4): forced readonly