BTRFS warning (device loop1): qgroup 0/5 has unreleased space, type 0 rsv 65536
BTRFS error (device loop1): qgroup reserved space leaked
BTRFS info (device loop1): at unmount dio bytes count 65536
-[  501.596600][ T7066] ------------[ cut here ]------------
WARNING: CPU: 0 PID: 7066 at fs/btrfs/block-group.c:172 btrfs_put_block_group+0x305/0x360 fs/btrfs/block-group.c:172
Modules linked in:
CPU: 0 UID: 0 PID: 7066 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:btrfs_put_block_group+0x305/0x360 fs/btrfs/block-group.c:172
Code: 42 80 3c 20 00 74 08 48 89 df e8 f6 3a 39 fe bf 18 1f 00 00 48 03 3b 48 89 de e8 96 a2 01 00 e9 c0 fe ff ff e8 ac 7b d7 fd 90 <0f> 0b 90 e9 84 fe ff ff e8 9e 7b d7 fd e9 7a fe ff ff e8 94 7b d7
RSP: 0018:ffffc90003aefac0 EFLAGS: 00010293
RAX: ffffffff83e731c4 RBX: ffff88805f748800 RCX: ffff88802763bc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10047a6c71 R12: dffffc0000000000
R13: ffff88805f748b3c R14: 0000000000010000 R15: dffffc0000000000
FS:  00005555790a1500(0000) GS:ffff888126df7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f023715df9c CR3: 000000004d418000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xb6b/0xf40 fs/btrfs/block-group.c:4568
 close_ctree+0x7bc/0x1380 fs/btrfs/disk-io.c:4426
 generic_shutdown_super+0x135/0x2c0 fs/super.c:642
 kill_anon_super+0x3b/0x70 fs/super.c:1281
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2134
 deactivate_locked_super+0xbc/0x130 fs/super.c:473
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1327
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6d1a8f09f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe6cf77618 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f6d1a971d7d RCX: 00007f6d1a8f09f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe6cf776d0
RBP: 00007ffe6cf776d0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe6cf78760
R13: 00007f6d1a971d7d R14: 000000000007a43d R15: 00007ffe6cf787a0
 </TASK>