------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888066df8490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 5847 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 5847 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 37 f9 8b fd 4d 8b 0f 48 c7 c7 80 7e c0 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 fa 77 e9 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 77 06 05 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a00 EFLAGS: 00010296
RAX: 86dbdc1cde681a00 RBX: dffffc0000000000 RCX: ffff88802aa88000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa658 R12: ffffffff8a3e1250
R13: ffffffff8bc08000 R14: ffff888066df8490 R15: ffffffff8b6cf600
FS:  000055557ab1d500(0000) GS:ffff888125e12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fca251156c0 CR3: 0000000072a26000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
 debug_check_no_obj_freed+0x3a2/0x470 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2446 [inline]
 slab_free mm/slub.c:6574 [inline]
 kfree+0x115/0x6d0 mm/slub.c:6781
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
 expire_timers kernel/time/timer.c:1798 [inline]
 __run_timers kernel/time/timer.c:2372 [inline]
 __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
 run_timer_base kernel/time/timer.c:2393 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
 handle_softirqs+0x283/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x4/0x90 kernel/kcov.c:322
Code: 89 74 11 18 48 89 44 11 20 e9 d8 8b 8e 09 cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <48> 8b 04 24 65 48 8b 0c 25 08 e0 90 92 65 8b 15 38 47 d1 10 81 e2
RSP: 0018:ffffc90003f4f308 EFLAGS: 00000246
RAX: ffffffff8230635c RBX: ffffffff8230631a RCX: ffff88802aa88000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffea000000000f R08: 0000000000000000 R09: ffffffff8230631a
R10: dffffc0000000000 R11: fffff9400031f111 R12: dffffc0000000000
R13: 1ffff11027fff4b0 R14: 0000000000063e22 R15: ffff88813fffa580
 pfn_valid+0x13a/0x490 include/linux/mmzone.h:2188
 page_table_check_set+0x25/0x730 mm/page_table_check.c:105
 page_table_check_ptes_set include/linux/page_table_check.h:76 [inline]
 set_ptes include/linux/pgtable.h:292 [inline]
 __copy_present_ptes mm/memory.c:1100 [inline]
 copy_present_ptes mm/memory.c:1179 [inline]
 copy_pte_range mm/memory.c:1302 [inline]
 copy_pmd_range+0x4b9b/0x7f00 mm/memory.c:1389
 copy_pud_range mm/memory.c:1426 [inline]
 copy_p4d_range mm/memory.c:1450 [inline]
 copy_page_range+0xc14/0x1270 mm/memory.c:1538
 dup_mmap+0xf4c/0x1b10 mm/mmap.c:1834
 dup_mm kernel/fork.c:1489 [inline]
 copy_mm+0x13c/0x4b0 kernel/fork.c:1541
 copy_process+0x1706/0x3c00 kernel/fork.c:2181
 kernel_clone+0x21e/0x840 kernel/fork.c:2609
 __do_sys_clone kernel/fork.c:2750 [inline]
 __se_sys_clone kernel/fork.c:2734 [inline]
 __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2734
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fca24385613
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffdc6661008 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fca24385613
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055557ab1d7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000007ba73 R15: 00007ffdc66611a0
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 74 11 18          	mov    %esi,0x18(%rcx,%rdx,1)
   4:	48 89 44 11 20       	mov    %rax,0x20(%rcx,%rdx,1)
   9:	e9 d8 8b 8e 09       	jmp    0x98e8be6
   e:	cc                   	int3
   f:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  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:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	90                   	nop
  26:	f3 0f 1e fa          	endbr64
* 2a:	48 8b 04 24          	mov    (%rsp),%rax <-- trapping instruction
  2e:	65 48 8b 0c 25 08 e0 	mov    %gs:0xffffffff9290e008,%rcx
  35:	90 92
  37:	65 8b 15 38 47 d1 10 	mov    %gs:0x10d14738(%rip),%edx        # 0x10d14776
  3e:	81                   	.byte 0x81
  3f:	e2                   	.byte 0xe2