------------[ cut here ]------------
ODEBUG: activate active (active state 0) object: ffff888025958858 object type: rcu_head hint: 0x0
WARNING: lib/debugobjects.c:615 at debug_print_object lib/debugobjects.c:612 [inline], CPU#1: swapper/1/0
WARNING: lib/debugobjects.c:615 at debug_object_activate+0x333/0x540 lib/debugobjects.c:842, CPU#1: swapper/1/0
Modules linked in:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:debug_print_object lib/debugobjects.c:612 [inline]
RIP: 0010:debug_object_activate+0x38b/0x540 lib/debugobjects.c:842
Code: 30 00 74 08 48 89 ef e8 b3 4b 8f fd 4c 8b 4d 00 4c 89 e7 48 c7 c6 c0 89 c0 8b 4c 89 fa 8b 4c 24 04 4c 8b 44 24 10 ff 74 24 08 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 7c 24 18 ff 05 3d 89 ea 0a b8 ea
RSP: 0018:ffffc90000a08bd0 EFLAGS: 00010246
RAX: 1ffffffff16d824c RBX: ffff888025958858 RCX: 0000000000000000
RDX: ffffffff8bc08f40 RSI: ffffffff8bc089c0 RDI: ffffffff8f8c8610
RBP: ffffffff8b6c1260 R08: ffff888025958858 R09: ffffffff8b6c12c0
R10: dffffc0000000000 R11: 0000000000000000 R12: ffffffff8f8c8610
R13: 0000000000000003 R14: dffffc0000000000 R15: ffffffff8bc08f40
FS:  0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f241b05df98 CR3: 0000000075c6c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000ffd7 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 __call_rcu_common kernel/rcu/tree.c:3104 [inline]
 call_rcu+0x43/0x890 kernel/rcu/tree.c:3239
 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
 afs_cell_destroy+0x16f/0x2c0 fs/afs/cell.c:580
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0xc8e/0x1720 kernel/rcu/tree.c:2857
 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 53 b1 0e 00 f3 0f 1e fa fb f4 <e9> 08 e3 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197e20 EFLAGS: 000002c6
RAX: 0000000000bd2623 RBX: ffffffff819713ee RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d792134 RDI: ffffffff8bc083e0
RBP: ffffc90000197f10 R08: ffff8880b87336db R09: 1ffff110170e66db
R10: dffffc0000000000 R11: ffffed10170e66dc R12: ffffffff8f822570
R13: 1ffff110038d4b70 R14: 0000000000000001 R15: 0000000000000001
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1be/0x4d0 kernel/sched/idle.c:332
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x147
 </TASK>
----------------
Code disassembly (best guess):
   0:	30 00                	xor    %al,(%rax)
   2:	74 08                	je     0xc
   4:	48 89 ef             	mov    %rbp,%rdi
   7:	e8 b3 4b 8f fd       	call   0xfd8f4bbf
   c:	4c 8b 4d 00          	mov    0x0(%rbp),%r9
  10:	4c 89 e7             	mov    %r12,%rdi
  13:	48 c7 c6 c0 89 c0 8b 	mov    $0xffffffff8bc089c0,%rsi
  1a:	4c 89 fa             	mov    %r15,%rdx
  1d:	8b 4c 24 04          	mov    0x4(%rsp),%ecx
  21:	4c 8b 44 24 10       	mov    0x10(%rsp),%r8
  26:	ff 74 24 08          	push   0x8(%rsp)
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 83 c4 08          	add    $0x8,%rsp
  33:	4c 8b 7c 24 18       	mov    0x18(%rsp),%r15
  38:	ff 05 3d 89 ea 0a    	incl   0xaea893d(%rip)        # 0xaea897b
  3e:	b8                   	.byte 0xb8
  3f:	ea                   	(bad)