------------[ cut here ]------------
fs_info->delayed_refs_rsv.reserved > 0
WARNING: fs/btrfs/block-rsv.c:472 at btrfs_release_global_block_rsv+0x2e4/0x300, CPU#1: syz-executor/5820
Modules linked in:
CPU: 1 UID: 0 PID: 5820 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:btrfs_release_global_block_rsv+0x2e4/0x300
Code: 0f 0b 90 e9 c1 fe ff ff e8 d9 78 b4 fd 90 0f 0b 90 e9 eb fe ff ff e8 cb 78 b4 fd 90 0f 0b 90 e9 15 ff ff ff e8 bd 78 b4 fd 90 <0f> 0b 90 e9 46 ff ff ff e8 af 78 b4 fd 90 0f 0b 90 e9 69 ff ff ff
RSP: 0018:ffffc900065efaa8 EFLAGS: 00010293
RAX: ffffffff84112843 RBX: ffff88816aa34478 RCX: ffff888113241d40
RDX: 0000000000000000 RSI: 0000000000044000 RDI: 0000000000000000
RBP: ffff88816aa34188 R08: ffff88816c4f9023 R09: 1ffff1102d89f204
R10: dffffc0000000000 R11: ffffed102d89f205 R12: dead000000000100
R13: 0000000000000000 R14: 0000000000044000 R15: dffffc0000000000
FS:  00005555884d9500(0000) GS:ffff8882a945d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056128a5bf000 CR3: 000000010b1cc000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xe04/0x1110
 close_ctree+0x809/0x1380
 generic_shutdown_super+0x13d/0x2d0
 kill_anon_super+0x3b/0x70
 btrfs_kill_super+0x41/0x50
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc6e039d9d7
Code: a2 c7 05 1c fd 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:00007ffd57f0db88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc6e0432050 RCX: 00007fc6e039d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd57f0dc40
RBP: 00007ffd57f0dc40 R08: 00007ffd57f0ec40 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd57f0ecd0
R13: 00007fc6e0432050 R14: 000000000001a2ac R15: 00007ffd57f0ed10
 </TASK>
