BTRFS info (device loop0): balance: start -d -m
BTRFS info (device loop0): relocating block group 6881280 flags data|metadata
BTRFS info (device loop0): relocating block group 5242880 flags data|metadata
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5356 at fs/btrfs/extent-tree.c:3230 __btrfs_free_extent+0x28a4/0x4250 fs/btrfs/extent-tree.c:3230
Modules linked in:
CPU: 0 UID: 0 PID: 5356 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-11129-geacf91b0c78a #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
RIP: 0010:__btrfs_free_extent+0x28a4/0x4250 fs/btrfs/extent-tree.c:3230
Code: 0b 01 0f 85 a6 01 00 00 e8 39 b9 fc fd e9 c0 01 00 00 80 3d 9c 17 ca 0b 01 0f 85 29 02 00 00 e8 22 b9 fc fd e9 43 02 00 00 90 <0f> 0b 90 48 8b 44 24 20 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00
RSP: 0018:ffffc9000d3c6ca0 EFLAGS: 00010246
RAX: 0000000000000002 RBX: ffff888042df7eb0 RCX: 0000000000000005
RDX: ffffffff83c2d1c9 RSI: ffffffff8e6c6fa0 RDI: 00000000fffffffe
RBP: ffffc9000d3c6e50 R08: ffff88801c65c880 R09: 0000000000000002
R10: 00000000fffffffe R11: 0000000000000000 R12: 00000000fffffffe
R13: 0000000000000345 R14: ffff88803fae24d0 R15: 00000000fffffffe
FS:  00007fbf1e1756c0(0000) GS:ffff88808d21f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003000 CR3: 0000000042e19000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 run_delayed_tree_ref fs/btrfs/extent-tree.c:1749 [inline]
 run_one_delayed_ref fs/btrfs/extent-tree.c:1775 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1972 [inline]
 __btrfs_run_delayed_refs+0xe7f/0x4130 fs/btrfs/extent-tree.c:2047
 btrfs_run_delayed_refs+0xe6/0x3b0 fs/btrfs/extent-tree.c:2159
 btrfs_start_dirty_block_groups+0xd3d/0x10a0 fs/btrfs/block-group.c:3527
 btrfs_commit_transaction+0x674/0x3950 fs/btrfs/transaction.c:2244
 prepare_to_merge+0x929/0x1a10 fs/btrfs/relocation.c:1786
 relocate_block_group+0xb06/0xd90 fs/btrfs/relocation.c:3641
 btrfs_relocate_block_group+0x6bc/0xc60 fs/btrfs/relocation.c:3978
 btrfs_relocate_chunk+0x12f/0x5c0 fs/btrfs/volumes.c:3446
 __btrfs_balance+0x1860/0x23f0 fs/btrfs/volumes.c:4222
 btrfs_balance+0xac2/0x11b0 fs/btrfs/volumes.c:4599
 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3577
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbf1d38eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbf1e175038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fbf1d5b6080 RCX: 00007fbf1d38eb69
RDX: 0000200000000180 RSI: 00000000c4009420 RDI: 0000000000000005
RBP: 00007fbf1d411df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbf1d5b6080 R15: 00007fffa6469a28
 </TASK>