------------[ cut here ]------------
WARNING: fs/btrfs/block-rsv.c:465 at btrfs_release_global_block_rsv+0x254/0x270 fs/btrfs/block-rsv.c:465, CPU#1: syz-executor/5803
Modules linked in:
CPU: 1 UID: 0 PID: 5803 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_release_global_block_rsv+0x254/0x270 fs/btrfs/block-rsv.c:465
Code: 0f 0b 90 e9 e1 fe ff ff e8 c9 77 d7 fd 90 0f 0b 90 e9 0b ff ff ff e8 bb 77 d7 fd 90 0f 0b 90 e9 35 ff ff ff e8 ad 77 d7 fd 90 <0f> 0b 90 e9 66 ff ff ff e8 9f 77 d7 fd 90 0f 0b 90 eb 88 66 0f 1f
RSP: 0018:ffffc90004c47a90 EFLAGS: 00010293
RAX: ffffffff83e884c3 RBX: ffff88804e0a06b0 RCX: ffff888026c08000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88804e0a02a8 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1db31af R12: ffff88804e0a02a0
R13: ffff88805b6eb33c R14: 0000000000008000 R15: dffffc0000000000
FS:  000055556a0aa500(0000) GS:ffff888126e71000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f914ff8 CR3: 000000002837c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xc2c/0xf40 fs/btrfs/block-group.c:4570
 close_ctree+0x7bc/0x1380 fs/btrfs/disk-io.c:4426
 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:2134
 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+0xff/0x4f0 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+0x2e3/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f489d830a77
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:00007ffdd40c21d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f489d8b3d7d RCX: 00007f489d830a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdd40c2290
RBP: 00007ffdd40c2290 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdd40c3320
R13: 00007f489d8b3d7d R14: 0000000000019122 R15: 00007ffdd40c3360
 </TASK>