------------[ cut here ]------------
WARNING: CPU: 1 PID: 4278 at fs/btrfs/block-group.c:3509 do_chunk_alloc fs/btrfs/block-group.c:3509 [inline]
WARNING: CPU: 1 PID: 4278 at fs/btrfs/block-group.c:3509 btrfs_chunk_alloc+0xb2e/0xf40 fs/btrfs/block-group.c:3732
Modules linked in:
CPU: 1 PID: 4278 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound btrfs_async_reclaim_data_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:ffffc900033af9a0 EFLAGS: 00010246
RAX: cfc756ce837df400 RBX: ffff888061a64800 RCX: ffff88802aded940
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000005 R08: dffffc0000000000 R09: ffffed1017224f2c
R10: ffffed1017224f2c R11: 1ffff11017224f2b R12: dffffc0000000000
R13: ffffffffffffffe4 R14: ffff888061a64800 R15: ffff888073d3b790
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f43aba79198 CR3: 000000007b3ad000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 flush_space+0x433/0xc50 fs/btrfs/space-info.c:670
 btrfs_async_reclaim_data_space+0x113/0x440 fs/btrfs/space-info.c:1169
 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>