BTRFS error (device loop5): qgroup reserved space leaked
BTRFS info (device loop5): at unmount dio[  371.247155][ T6091] BTRFS info (device loop5): at unmount dio bytes count 36864
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WARNING: fs/btrfs/block-group.c:172 at btrfs_put_block_group+0x305/0x360 fs/btrfs/block-group.c:172, CPU#0: syz-executor/6091
Modules linked in:
CPU: 0 UID: 0 PID: 6091 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 e6 2b 37 fe bf 10 1f 00 00 48 03 3b 48 89 de e8 b6 a6 01 00 e9 c0 fe ff ff e8 3c f2 d4 fd 90 <0f> 0b 90 e9 84 fe ff ff e8 2e f2 d4 fd e9 7a fe ff ff e8 24 f2 d4
RSP: 0018:ffffc900065d7a98 EFLAGS: 00010293
RAX: ffffffff83eaba84 RBX: ffff8880276a6000 RCX: ffff88802f91bc80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10050d5470 R12: dffffc0000000000
R13: ffff8880276a633c R14: 0000000000009000 R15: dffffc0000000000
FS:  00005555758c7500(0000) GS:ffff888126cee000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa8ea828020 CR3: 000000001c370000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xbf1/0xfd0 fs/btrfs/block-group.c:4573
 close_ctree+0x7bc/0x1380 fs/btrfs/disk-io.c:4411
 generic_shutdown_super+0x135/0x2c0 fs/super.c:643
 kill_anon_super+0x3b/0x70 fs/super.c:1289
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2127
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318
 task_work_run+0x1d4/0x260 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
 exit_to_user_mode_loop+0xef/0x4e0 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2c1/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa68d400a77
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:00007ffc921061e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fa68d483d7d RCX: 00007fa68d400a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc921062a0
RBP: 00007ffc921062a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc92107330
R13: 00007fa68d483d7d R14: 000000000005a786 R15: 00007ffc92107370
 </TASK>