BTRFS info (device loop7): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
------------[ cut here ]------------
fs_info->delayed_refs_rsv.reserved > 0
WARNING: fs/btrfs/block-rsv.c:472 at btrfs_release_global_block_rsv+0x2e4/0x300 fs/btrfs/block-rsv.c:472, CPU#1: syz-executor/6525
Modules linked in:
CPU: 1 UID: 0 PID: 6525 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:btrfs_release_global_block_rsv+0x2e4/0x300 fs/btrfs/block-rsv.c:472
Code: 0f 0b 90 e9 c1 fe ff ff e8 39 ec b4 fd 90 0f 0b 90 e9 eb fe ff ff e8 2b ec b4 fd 90 0f 0b 90 e9 15 ff ff ff e8 1d ec b4 fd 90 <0f> 0b 90 e9 46 ff ff ff e8 0f ec b4 fd 90 0f 0b 90 e9 69 ff ff ff
RSP: 0018:ffffc90006bbfaa8 EFLAGS: 00010293
RAX: ffffffff8410b193 RBX: ffff88807a948478 RCX: ffff88802f1d5b80
RDX: 0000000000000000 RSI: 0000000000090000 RDI: 0000000000000000
RBP: ffff88807a948188 R08: ffff88807bc6a823 R09: 1ffff1100f78d504
R10: dffffc0000000000 R11: ffffed100f78d505 R12: dead000000000100
R13: 0000000000000000 R14: 0000000000090000 R15: dffffc0000000000
FS:  000055559467f500(0000) GS:ffff888125563000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000020000 CR3: 000000005ceb6000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xe04/0x1110 fs/btrfs/block-group.c:4679
 close_ctree+0x809/0x1380 fs/btrfs/disk-io.c:4462
 generic_shutdown_super+0x13d/0x2d0 fs/super.c:646
 kill_anon_super+0x3b/0x70 fs/super.c:1292
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2127
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 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:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __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 include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c2eb9d9d7
Code: a2 c7 05 1c ed 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffee8742af8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000064 RCX: 00007f1c2eb9d9d7
RDX: 0000000000000200 RSI: 0000000000000009 RDI: 00007ffee8743ca0
RBP: 00007f1c2ec31f90 R08: 00000000000105a0 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000202 R12: 00007ffee8743ca0
R13: 00007f1c2ec31f90 R14: 000055559467f4e8 R15: 00007ffee8744d70
 </TASK>