------------[ cut here ]------------
WARNING: CPU: 1 PID: 5825 at fs/btrfs/block-rsv.c:465 btrfs_release_global_block_rsv+0x254/0x270 fs/btrfs/block-rsv.c:465
Modules linked in:
CPU: 1 UID: 0 PID: 5825 Comm: syz-executor Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:btrfs_release_global_block_rsv+0x254/0x270 fs/btrfs/block-rsv.c:465
Code: 0f 0b 90 e9 e1 fe ff ff e8 79 fa db fd 90 0f 0b 90 e9 0b ff ff ff e8 6b fa db fd 90 0f 0b 90 e9 35 ff ff ff e8 5d fa db fd 90 <0f> 0b 90 e9 66 ff ff ff e8 4f fa db fd 90 0f 0b 90 eb 88 66 0f 1f
RSP: 0018:ffffc900042dfad0 EFLAGS: 00010293
RAX: ffffffff83e45333 RBX: ffff8880299b8400 RCX: ffff8880276dbc00
RDX: 0000000000000000 RSI: 0000000000018000 RDI: 0000000000000000
RBP: ffff8880299b8188 R08: ffff88804e328023 R09: 1ffff11009c65004
R10: dffffc0000000000 R11: ffffed1009c65005 R12: ffff8880299b8180
R13: ffff88805825f318 R14: 0000000000018000 R15: dffffc0000000000
FS:  0000555576325500(0000) GS:ffff888125d84000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f6937685f8 CR3: 000000005fbac000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xc2c/0xf40 fs/btrfs/block-group.c:4557
 close_ctree+0x7f0/0xd60 fs/btrfs/disk-io.c:4426
 generic_shutdown_super+0x135/0x2c0 fs/super.c:643
 kill_anon_super+0x3b/0x70 fs/super.c:1282
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2095
 deactivate_locked_super+0xb9/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1417
 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+0xec/0x110 kernel/entry/common.c:114
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc4a378fc57
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:00007ffd2c152958 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000064 RCX: 00007fc4a378fc57
RDX: 0000000000000200 RSI: 0000000000000009 RDI: 00007ffd2c153b00
RBP: 00007fc4a3810925 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000202 R12: 00007ffd2c153b00
R13: 00007fc4a3810925 R14: 00005555763254a8 R15: 00007ffd2c154bd0
 </TASK>