------------[ cut here ]------------
ODEBUG: activate active (active state 0) object: ffff888062689358 object type: rcu_head hint: 0x0
WARNING: CPU: 0 PID: 20 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 20 Comm: rcuc/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 b7 c8 96 fd 4d 8b 0f 48 c7 c7 00 55 3f 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 ba 6e f9 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 c7 4d 6e 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0000:ffffc90000197720 EFLAGS: 00010292
RAX: 95dc588234bdb700 RBX: dffffc0000000000 RCX: ffff88801beada00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed101710487b R12: 0000000000000000
R13: ffffffff8b3f5680 R14: ffff888062689358 R15: ffffffff8aebe980
FS:  0000000000000000(0000) GS:ffff888126bcd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f08c1a8f000 CR3: 000000004f1de000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 debug_object_activate+0x257/0x3a0 lib/debugobjects.c:842
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 __call_rcu_common kernel/rcu/tree.c:3108 [inline]
 call_rcu+0xaa/0x9c0 kernel/rcu/tree.c:3243
 radix_tree_node_free lib/radix-tree.c:310 [inline]
 delete_node+0x1bc/0xa60 lib/radix-tree.c:573
 radix_tree_delete_item+0x2b9/0x410 lib/radix-tree.c:1430
 afs_cell_destroy+0x16f/0x2c0 fs/afs/cell.c:523
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core kernel/rcu/tree.c:2861 [inline]
 rcu_cpu_kthread+0xbf3/0x1b50 kernel/rcu/tree.c:2949
 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4b9/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>