------------[ cut here ]------------
ODEBUG: activate active (active state 0) object: ffff8880242ba118 object type: rcu_head hint: 0x0
WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#0: swapper/0/0
WARNING: lib/debugobjects.c:632 at debug_object_activate+0x33b/0x580 lib/debugobjects.c:859, CPU#0: swapper/0/0
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:debug_print_object lib/debugobjects.c:629 [inline]
RIP: 0010:debug_object_activate+0x39c/0x580 lib/debugobjects.c:859
Code: 30 00 74 08 4c 89 ef e8 92 c1 69 fd 4d 8b 4d 00 4c 89 e7 48 c7 c6 c0 5d 4a 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 5c 5b 8c 0b b8 ea
RSP: 0018:ffffc90000007bd0 EFLAGS: 00010246
RAX: 1ffffffff17dc138 RBX: ffff8880242ba118 RCX: 0000000000000000
RDX: ffffffff8c4a63a0 RSI: ffffffff8c4a5dc0 RDI: ffffffff905ec750
RBP: 0000000000000003 R08: ffff8880242ba118 R09: ffffffff8bee0a20
R10: dffffc0000000000 R11: 0000000000000000 R12: ffffffff905ec750
R13: ffffffff8bee09c0 R14: dffffc0000000000 R15: ffffffff8c4a63a0
FS:  0000000000000000(0000) GS:ffff888124de6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000c18000 CR3: 00000000268b2000 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/0x870 kernel/softirq.c:626
 __do_softirq kernel/softirq.c:660 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:739
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:756
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
 </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: cd 8e 02 e9 93 ed 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 73 93 29 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:ffffffff8e807dc0 EFLAGS: 00000242
RAX: 00000000003f2383 RBX: ffffffff819bd79d RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8e22d498 RDI: ffffffff8c4a57e0
RBP: ffffffff8e807eb0 R08: ffff8880b843399b R09: 1ffff11017086733
R10: dffffc0000000000 R11: ffffed1017086734 R12: ffffffff9053fbf0
R13: 1ffffffff1d129d8 R14: 0000000000000000 R15: 0000000000000000
 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
 rest_init+0x2de/0x300 init/main.c:761
 start_kernel+0x38a/0x3e0 init/main.c:1212
 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
 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 92 c1 69 fd       	call   0xfd69c19e
   c:	4d 8b 4d 00          	mov    0x0(%r13),%r9
  10:	4c 89 e7             	mov    %r12,%rdi
  13:	48 c7 c6 c0 5d 4a 8c 	mov    $0xffffffff8c4a5dc0,%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 5c 5b 8c 0b    	incl   0xb8c5b5c(%rip)        # 0xb8c5b9a
  3e:	b8                   	.byte 0xb8
  3f:	ea                   	(bad)