------------[ cut here ]------------
ODEBUG: activate active (active state 0) object: ffff88805a0ee698 object type: rcu_head hint: 0x0
WARNING: CPU: 1 PID: 7769 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 7769 Comm: syz.4.397 Not tainted 6.15.0-rc5-syzkaller-00022-g01f95500a162 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
RIP: 0010:debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 41 56 48 8b 14 dd c0 93 f4 8b 4c 89 e6 48 c7 c7 40 88 f4 8b e8 8f 88 a4 fc 90 <0f> 0b 90 90 58 83 05 c6 fe ae 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000a08ad8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817ac018
RDX: ffff888028730000 RSI: ffffffff817ac025 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8bf48e60
R13: ffffffff8b8e9540 R14: 0000000000000000 R15: ffffc90000a08b98
FS:  00007f4d8cdfd6c0(0000) GS:ffff888124adf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c39be1d CR3: 00000000527d3000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 debug_object_activate+0x2bc/0x4c0 lib/debugobjects.c:842
 debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline]
 __call_rcu_common.constprop.0+0x2c/0x9f0 kernel/rcu/tree.c:3067
 radix_tree_node_free lib/radix-tree.c:310 [inline]
 delete_node+0x1fc/0x8d0 lib/radix-tree.c:573
 __radix_tree_delete+0x193/0x3d0 lib/radix-tree.c:1379
 radix_tree_delete_item+0xea/0x230 lib/radix-tree.c:1430
 afs_cell_destroy+0x1db/0x310 fs/afs/cell.c:522
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0x799/0x14e0 kernel/rcu/tree.c:2824
 handle_softirqs+0x216/0x8e0 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: e9 ad b7 5a 00 be 03 00 00 00 5b e9 f2 ad 15 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <65> 48 8b 15 18 dd e8 11 65 8b 05 29 dd e8 11 a9 00 01 ff 00 74 1d
RSP: 0018:ffffc90003fff760 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffffffff8207dcb5
RDX: ffff888028730000 RSI: ffffffff8207dcf8 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffc90003fff9a8 R14: ffffc90003fff9d8 R15: ffffea0001b41c80
 finish_fault+0x2f8/0x1120 mm/memory.c:5339
 do_read_fault mm/memory.c:5522 [inline]
 do_fault mm/memory.c:5652 [inline]
 do_pte_missing+0x105a/0x3fb0 mm/memory.c:4160
 handle_pte_fault mm/memory.c:5997 [inline]
 __handle_mm_fault+0x103d/0x2a40 mm/memory.c:6140
 handle_mm_fault+0x3fe/0xad0 mm/memory.c:6309
 faultin_page mm/gup.c:1193 [inline]
 __get_user_pages+0x771/0x36f0 mm/gup.c:1491
 populate_vma_page_range+0x278/0x3a0 mm/gup.c:1929
 __mm_populate+0x1d8/0x380 mm/gup.c:2032
 mm_populate include/linux/mm.h:3487 [inline]
 vm_mmap_pgoff+0x362/0x450 mm/util.c:584
 ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:607
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4d8bf8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4d8cdfd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f4d8c1b5fa0 RCX: 00007f4d8bf8e969
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f4d8c010ab1 R08: ffffffffffffffff R09: 0000000079902000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4d8c1b5fa0 R15: 00007ffc99fd3bb8
 </TASK>
----------------
Code disassembly (best guess):
   0:	e9 ad b7 5a 00       	jmp    0x5ab7b2
   5:	be 03 00 00 00       	mov    $0x3,%esi
   a:	5b                   	pop    %rbx
   b:	e9 f2 ad 15 03       	jmp    0x315ae02
  10:	66 90                	xchg   %ax,%ax
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	f3 0f 1e fa          	endbr64
  26:	48 8b 34 24          	mov    (%rsp),%rsi
* 2a:	65 48 8b 15 18 dd e8 	mov    %gs:0x11e8dd18(%rip),%rdx        # 0x11e8dd4a <-- trapping instruction
  31:	11
  32:	65 8b 05 29 dd e8 11 	mov    %gs:0x11e8dd29(%rip),%eax        # 0x11e8dd62
  39:	a9 00 01 ff 00       	test   $0xff0100,%eax
  3e:	74 1d                	je     0x5d