------------[ cut here ]------------
WARNING: CPU: 0 PID: 1080 at fs/btrfs/extent-tree.c:3228 __btrfs_free_extent+0x2178/0x2eb0 fs/btrfs/extent-tree.c:3228
Modules linked in:
CPU: 0 UID: 0 PID: 1080 Comm: kworker/u4:9 Not tainted 6.16.0-rc2-syzkaller-00378-gb67ec639010f #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events_unbound btrfs_async_reclaim_metadata_space
RIP: 0010:__btrfs_free_extent+0x2178/0x2eb0 fs/btrfs/extent-tree.c:3228
Code: 40 42 0f b6 04 28 84 c0 0f 85 b7 0c 00 00 41 8b 14 24 48 c7 c6 e0 15 cd 8b e8 14 2f 69 fd 41 be 8b ff ff ff e9 aa f5 ff ff 90 <0f> 0b 90 48 8b 44 24 28 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00
RSP: 0018:ffffc90002567280 EFLAGS: 00010246
RAX: 0000000000000002 RBX: ffff88804409cbf0 RCX: 0000000000000005
RDX: ffff8880451a02b0 RSI: ffffffff8e6ce530 RDI: 00000000fffffffe
RBP: ffffc90002567430 R08: ffff888035b1a440 R09: 0000000000000002
R10: 00000000fffffffe R11: 0000000000000000 R12: 00000000fffffffe
R13: dffffc0000000000 R14: 0000000000000104 R15: 00000000fffffffe
FS:  0000000000000000(0000) GS:ffff88808d251000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005601113a2630 CR3: 0000000043ff3000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 run_delayed_data_ref fs/btrfs/extent-tree.c:1597 [inline]
 run_one_delayed_ref fs/btrfs/extent-tree.c:1777 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1970 [inline]
 __btrfs_run_delayed_refs+0xc2f/0x3a50 fs/btrfs/extent-tree.c:2045
 btrfs_run_delayed_refs+0xe6/0x300 fs/btrfs/extent-tree.c:2157
 flush_space+0x24b/0xcd0 fs/btrfs/space-info.c:-1
 do_async_reclaim_metadata_space+0x144/0x390 fs/btrfs/space-info.c:1158
 btrfs_async_reclaim_metadata_space+0x89/0xe0 fs/btrfs/space-info.c:1226
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>