------------[ cut here ]------------
WARNING: CPU: 0 PID: 144 at fs/btrfs/extent-tree.c:3082 __btrfs_free_extent+0x882/0x2100 fs/btrfs/extent-tree.c:3082
Modules linked in:
CPU: 0 PID: 144 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Workqueue: events_unbound btrfs_async_reclaim_metadata_space
RIP: 0010:__btrfs_free_extent+0x882/0x2100 fs/btrfs/extent-tree.c:3082
Code: fe e9 38 02 00 00 e8 7d e5 38 fe 0f 1f 44 00 00 e8 73 e5 38 fe eb 15 e8 6c e5 38 fe 48 c7 c7 60 8e 6a 8a 89 de e8 7e ec 70 06 <0f> 0b 4c 89 f7 48 c7 c6 e0 9b 6a 8a ba 0a 0c 00 00 89 d9 e8 06 1d
RSP: 0018:ffffc9000156f5c0 EFLAGS: 00010246
RAX: f7007a567e3bf100 RBX: 00000000ffffffe4 RCX: ffff88801bd1bb80
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000156f720 R08: ffff8880b902795b R09: 1ffff11017204f2b
R10: dffffc0000000000 R11: ffffed1017204f2c R12: 00000000ffffffe4
R13: 00000000ffffffe4 R14: ffff888075214580 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056430928b828 CR3: 000000007a892000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 run_delayed_tree_ref fs/btrfs/extent-tree.c:1707 [inline]
 run_one_delayed_ref fs/btrfs/extent-tree.c:1731 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1977 [inline]
 __btrfs_run_delayed_refs+0xf66/0x3910 fs/btrfs/extent-tree.c:2040
 btrfs_run_delayed_refs+0x140/0x480 fs/btrfs/extent-tree.c:2171
 flush_space+0x91d/0xc70 fs/btrfs/space-info.c:660
 btrfs_async_reclaim_metadata_space+0x26f/0x330 fs/btrfs/space-info.c:953
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>