------------[ cut here ]------------
WARNING: CPU: 0 PID: 5085 at fs/btrfs/block-group.c:159 btrfs_put_block_group+0x216/0x260 fs/btrfs/block-group.c:159
Modules linked in:
CPU: 0 PID: 5085 Comm: syz-executor.2 Not tainted 6.7.0-syzkaller-01727-gab27740f7665 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:btrfs_put_block_group+0x216/0x260 fs/btrfs/block-group.c:159
Code: e8 ef 10 d5 fd 90 0f 0b 90 e9 87 fe ff ff e8 e1 10 d5 fd 48 89 df be 03 00 00 00 5b 41 5e 5d e9 c0 82 cb 00 e8 cb 10 d5 fd 90 <0f> 0b 90 e9 4b ff ff ff e8 bd 10 d5 fd 90 0f 0b 90 4c 89 f0 48 c1
RSP: 0018:ffffc90003c6fad8 EFLAGS: 00010293
RAX: ffffffff83b9e245 RBX: 0000000000006000 RCX: ffff888028ef5940
RDX: 0000000000000000 RSI: 0000000000006000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff83b9e18b R09: 1ffff1100945bb3e
R10: dffffc0000000000 R11: ffffed100945bb3f R12: ffff88804b85d800
R13: 1ffff1100970bb2e R14: ffff88804b85d800 R15: ffff88804a2dc188
FS:  0000555555e88480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6ae7968000 CR3: 0000000051b86000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xb77/0x1070 fs/btrfs/block-group.c:4360
 close_ctree+0x75a/0xd40 fs/btrfs/disk-io.c:4390
 generic_shutdown_super+0x13a/0x2c0 fs/super.c:652
 kill_anon_super+0x3b/0x70 fs/super.c:1230
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2102
 deactivate_locked_super+0xc1/0x130 fs/super.c:477
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267
 task_work_run+0x24a/0x300 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x167/0x370 kernel/entry/common.c:212
 do_syscall_64+0x102/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f5922c7e057
Code: b0 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 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffddbc35128 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f5922c7e057
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffddbc351e0
RBP: 00007ffddbc351e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffddbc362a0
R13: 00007f5922cc83b9 R14: 000000000005c27d R15: 0000000000000012
 </TASK>