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ODEBUG: activate active (active state 0) object: ffff88814945cb18 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+0x33b/0x580 lib/debugobjects.c:842, CPU#1: swapper/1/0
Modules linked in:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:debug_print_object lib/debugobjects.c:612 [inline]
RIP: 0010:debug_object_activate+0x39c/0x580 lib/debugobjects.c:842
Code: 30 00 74 08 4c 89 ef e8 32 11 76 fd 4d 8b 4d 00 4c 89 e7 48 c7 c6 e0 65 29 8c 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 ec 09 7a 0b b8 ea
RSP: 0018:ffffc90000a08bf0 EFLAGS: 00010246
RAX: 1ffffffff179c3bc RBX: ffff88814945cb18 RCX: 0000000000000000
RDX: ffffffff8c296bc0 RSI: ffffffff8c2965e0 RDI: ffffffff903cb640
RBP: 0000000000000003 R08: ffff88814945cb18 R09: ffffffff8bce1e40
R10: dffffc0000000000 R11: 0000000000000000 R12: ffffffff903cb640
R13: ffffffff8bce1de0 R14: dffffc0000000000 R15: ffffffff8c296bc0
FS:  0000000000000000(0000) GS:ffff88812516c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000069b84000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 __call_rcu_common kernel/rcu/tree.c:3116 [inline]
 call_rcu+0x43/0x890 kernel/rcu/tree.c:3251
 radix_tree_node_free lib/radix-tree.c:310 [inline]
 delete_node+0x1b6/0xa50 lib/radix-tree.c:573
 radix_tree_delete_item+0x2e9/0x400 lib/radix-tree.c:1430
 afs_cell_destroy+0x16f/0x2c0 fs/afs/cell.c:580
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869
 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:626
 __do_softirq kernel/softirq.c:660 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:727
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:743
 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+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: 47 82 02 e9 83 e7 02 00 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 a3 ce 20 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc90000197e20 EFLAGS: 00000242
RAX: 00000000000b70b5 RBX: ffffffff819a2aad RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8dff714e RDI: ffffffff8c296000
RBP: ffffc90000197f10 R08: ffff8880b853375b R09: 1ffff110170a66eb
R10: dffffc0000000000 R11: ffffed10170a66ec R12: ffffffff903200b0
R13: 1ffff11003bd4000 R14: 0000000000000001 R15: 0000000000000001
 arch_safe_halt arch/x86/kernel/process.c:766 [inline]
 default_idle+0x9/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1bd/0x500 kernel/sched/idle.c:332
 cpu_startup_entry+0x43/0x60 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:	4c 89 ef             	mov    %r13,%rdi
   7:	e8 32 11 76 fd       	call   0xfd76113e
   c:	4d 8b 4d 00          	mov    0x0(%r13),%r9
  10:	4c 89 e7             	mov    %r12,%rdi
  13:	48 c7 c6 e0 65 29 8c 	mov    $0xffffffff8c2965e0,%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 ec 09 7a 0b    	incl   0xb7a09ec(%rip)        # 0xb7a0a2a
  3e:	b8                   	.byte 0xb8
  3f:	ea                   	(bad)