------------[ cut here ]------------
WARNING: CPU: 0 PID: 1274 at fs/btrfs/block-group.c:3509 do_chunk_alloc fs/btrfs/block-group.c:3509 [inline]
WARNING: CPU: 0 PID: 1274 at fs/btrfs/block-group.c:3509 btrfs_chunk_alloc+0xb2e/0xf40 fs/btrfs/block-group.c:3732
Modules linked in:
CPU: 0 PID: 1274 Comm: kworker/u4:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound btrfs_async_reclaim_metadata_space
RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:3509 [inline]
RIP: 0010:btrfs_chunk_alloc+0xb2e/0xf40 fs/btrfs/block-group.c:3732
Code: 00 00 e8 25 cd 19 fe 4c 89 f3 0f 1f 44 00 00 e8 18 cd 19 fe eb 16 e8 11 cd 19 fe 48 c7 c7 60 0d 4d 8a 44 89 ee e8 e2 28 39 06 <0f> 0b 4c 89 ff 48 c7 c6 60 1b 4d 8a ba b5 0d 00 00 eb 74 e8 ea cc
RSP: 0018:ffffc90005256b80 EFLAGS: 00010246
RAX: fc697c752df55300 RBX: ffff888079d25000 RCX: ffff888022a08000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000005 R08: dffffc0000000000 R09: ffffed1017204f2c
R10: ffffed1017204f2c R11: 1ffff11017204f2b R12: dffffc0000000000
R13: ffffffffffffffe4 R14: ffff888079d25000 R15: ffff888075bec0b0
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f02dc2eb000 CR3: 0000000076a0b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 find_free_extent_update_loop fs/btrfs/extent-tree.c:4054 [inline]
 find_free_extent+0x2ba5/0x3560 fs/btrfs/extent-tree.c:4417
 btrfs_reserve_extent+0x20a/0x530 fs/btrfs/extent-tree.c:4498
 cow_file_range+0x57f/0xb50 fs/btrfs/inode.c:1181
 btrfs_run_delalloc_range+0x292/0x1490 fs/btrfs/inode.c:2018
 writepage_delalloc+0x14c/0x360 fs/btrfs/extent_io.c:3809
 __extent_writepage+0x51f/0xb00 fs/btrfs/extent_io.c:4115
 extent_write_cache_pages fs/btrfs/extent_io.c:5037 [inline]
 extent_writepages+0x9c4/0x13b0 fs/btrfs/extent_io.c:5164
 do_writepages+0x48d/0x6d0 mm/page-writeback.c:2386
 filemap_fdatawrite_wbc+0x1eb/0x240 mm/filemap.c:400
 start_delalloc_inodes+0x718/0xb20 fs/btrfs/inode.c:10142
 btrfs_start_delalloc_roots+0x596/0x800 fs/btrfs/inode.c:10221
 shrink_delalloc fs/btrfs/space-info.c:538 [inline]
 flush_space+0x58e/0xc50 fs/btrfs/space-info.c:646
 btrfs_async_reclaim_metadata_space+0x26f/0x330 fs/btrfs/space-info.c:953
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>