------------[ cut here ]------------
ODEBUG: activate active (active state 0) object: ffff888148f758d8 object type: rcu_head hint: 0x0
WARNING: CPU: 0 PID: 5845 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 5845 Comm: syz-executor Not tainted 6.16.0-rc1-syzkaller-00236-g8c6bc74c7f89 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 b7 1c 61 fd 4d 8b 0f 48 c7 c7 a0 c0 e1 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 2a 74 c3 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 27 82 df 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc9000483f940 EFLAGS: 00010292
RAX: 1a39f8f03894a000 RBX: dffffc0000000000 RCX: ffff888035dc5a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffffffff8f9fe2f7 R09: 1ffffffff1f3fc5e
R10: dffffc0000000000 R11: fffffbfff1f3fc5f R12: 0000000000000000
R13: ffffffff8be1c220 R14: ffff888148f758d8 R15: ffffffff8b8bd680
FS:  0000555581e38500(0000) GS:ffff888125c85000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f7e1bfc4e0 CR3: 0000000029ac6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 debug_object_activate+0x26a/0x420 lib/debugobjects.c:842
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 __call_rcu_common kernel/rcu/tree.c:3075 [inline]
 call_rcu+0x95/0x990 kernel/rcu/tree.c:3210
 radix_tree_node_free lib/radix-tree.c:310 [inline]
 delete_node+0x1b6/0xa50 lib/radix-tree.c:573
 radix_tree_delete_item+0x2b6/0x400 lib/radix-tree.c:1430
 __bch2_fs_stop+0x5d3/0x900 fs/bcachefs/super.c:694
 generic_shutdown_super+0x132/0x2c0 fs/super.c:643
 bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2618
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1417
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3ef3b8fc57
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:00007ffcefbde9a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3ef3c10925 RCX: 00007f3ef3b8fc57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcefbdea60
RBP: 00007ffcefbdea60 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcefbdfaf0
R13: 00007f3ef3c10925 R14: 000000000001f53c R15: 00007ffcefbdfb30
 </TASK>