syzbot

------------[ cut here ]------------
online_reserved not 0 at shutdown: 8064
WARNING: CPU: 1 PID: 5832 at fs/bcachefs/super.c:585 __bch2_fs_free fs/bcachefs/super.c:585 [inline]
WARNING: CPU: 1 PID: 5832 at fs/bcachefs/super.c:585 bch2_fs_release+0x413/0x8f0 fs/bcachefs/super.c:624
Modules linked in:
CPU: 1 UID: 0 PID: 5832 Comm: syz-executor Not tainted 6.14.0-syzkaller-05877-g1a9239bb4253 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__bch2_fs_free fs/bcachefs/super.c:585 [inline]
RIP: 0010:bch2_fs_release+0x413/0x8f0 fs/bcachefs/super.c:624
Code: 74 24 10 31 ff 4c 89 f6 e8 fa 4a 64 fd 4d 85 f6 74 3e e8 90 4f 64 fd 90 48 8b 74 24 10 48 c7 c7 c0 b3 e5 8b e8 6e f9 23 fd 90 <0f> 0b 90 90 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80
RSP: 0018:ffffc90003d1fd48 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888049200068 RCX: ffffffff817abe18
RDX: ffff888031728000 RSI: ffffffff817abe25 RDI: 0000000000000001
RBP: ffff888049200000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000607edb233070
R13: ffff8880492048a0 R14: 0000000000001f80 R15: 0000000000000000
FS:  000055557c9fb500(0000) GS:ffff888124b41000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30416ff8 CR3: 000000005ca00000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1e7/0x5a0 lib/kobject.c:737
 deactivate_locked_super+0xc1/0x1a0 fs/super.c:473
 deactivate_super fs/super.c:506 [inline]
 deactivate_super+0xde/0x100 fs/super.c:502
 cleanup_mnt+0x225/0x450 fs/namespace.c:1435
 task_work_run+0x150/0x240 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb50a98e497
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:00007ffeebf03948 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fb50aa0e08c RCX: 00007fb50a98e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeebf03a00
RBP: 00007ffeebf03a00 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffeebf04a90
R13: 00007fb50aa0e08c R14: 000000000002c799 R15: 00007ffeebf04ad0
 </TASK>