BTRFS info (device loop2): at unmount dio bytes count 65536
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WARNING: CPU: 1 PID: 5055 at fs/btrfs/block-group.c:159 btrfs_put_block_group+0x22b/0x270
Modules linked in:
CPU: 1 PID: 5055 Comm: syz-executor.2 Not tainted 6.4.0-syzkaller-01312-gb19edac5992d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:btrfs_put_block_group+0x22b/0x270 fs/btrfs/block-group.c:159
Code: fe e8 e9 2a df fd 0f 0b e9 76 fe ff ff e8 dd 2a df fd 48 89 df be 03 00 00 00 5b 41 5e 41 5f 5d e9 5a 46 88 00 e8 c5 2a df fd <0f> 0b e9 48 ff ff ff e8 b9 2a df fd 0f 0b 4c 89 f0 48 c1 e8 03 42
RSP: 0018:ffffc9000462fab0 EFLAGS: 00010293
RAX: ffffffff83ac7f1b RBX: 0000000000010000 RCX: ffff88801fcf1dc0
RDX: 0000000000000000 RSI: 0000000000010000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff83ac7e5c R09: ffffed100537333d
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110076eb52c
R13: dffffc0000000000 R14: ffff88803b75a800 R15: dffffc0000000000
FS:  0000555556214400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020006000 CR3: 0000000038a26000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_free_block_groups+0x96a/0xe60 fs/btrfs/block-group.c:4301
 close_ctree+0x72c/0xd00 fs/btrfs/disk-io.c:4401
 generic_shutdown_super+0x134/0x340 fs/super.c:500
 kill_anon_super+0x3b/0x60 fs/super.c:1111
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2138
 deactivate_locked_super+0xa4/0x110 fs/super.c:331
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f946f08d7f7
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 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 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd247105b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f946f08d7f7
RDX: 00007ffd24710689 RSI: 000000000000000a RDI: 00007ffd24710680
RBP: 00007ffd24710680 R08: 00000000ffffffff R09: 00007ffd24710450
R10: 0000555556215873 R11: 0000000000000246 R12: 00007f946f0d643b
R13: 00007ffd24711740 R14: 0000555556215810 R15: 00007ffd24711780
 </TASK>