------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff8880207db090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 0 PID: 14512 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 14512 Comm: syz.4.2536 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:ffffc90000007a00 EFLAGS: 00010296
RAX: 0008fc06fa4dbb00 RBX: dffffc0000000000 RCX: ffff8880246d3c80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa658 R12: ffffffff8a3e0c00
R13: ffffffff8bc08000 R14: ffff8880207db090 R15: ffffffff8b6cf600
FS:  0000000000000000(0000) GS:ffff888125d0f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3131cff8 CR3: 0000000075a5c000 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:is_huge_zero_pfn include/linux/huge_mm.h:511 [inline]
RIP: 0010:__vm_normal_page mm/memory.c:734 [inline]
RIP: 0010:vm_normal_page+0xdc/0x240 mm/memory.c:753
Code: 89 df 4c 89 f6 e8 c4 34 b5 ff 4c 39 f3 75 0b e8 5a 32 b5 ff 90 0f 0b 90 eb 41 48 c7 c0 80 17 9e 8f 48 c1 e8 03 42 80 3c 20 00 <74> 0c 48 c7 c7 80 17 9e 8f e8 66 d0 1a 00 4c 8b 35 af b5 93 0d 4d
RSP: 0018:ffffc90003dbf360 EFLAGS: 00000246
RAX: 1ffffffff1f3c2f0 RBX: 00000000000652d5 RCX: ffff8880246d3c80
RDX: 0000000000000000 RSI: 0000000000012950 RDI: 00000000000652d5
RBP: 000000000023ffff R08: ffffea000194b533 R09: 1ffffd40003296a6
R10: dffffc0000000000 R11: fffff940003296a7 R12: dffffc0000000000
R13: 00080000000652d5 R14: 0000000000012950 R15: 000000fffffffe00
 zap_present_ptes mm/memory.c:1679 [inline]
 do_zap_pte_range mm/memory.c:1810 [inline]
 zap_pte_range mm/memory.c:1854 [inline]
 zap_pmd_range mm/memory.c:1946 [inline]
 zap_pud_range mm/memory.c:1975 [inline]
 zap_p4d_range mm/memory.c:1996 [inline]
 unmap_page_range+0xf12/0x4370 mm/memory.c:2017
 unmap_single_vma mm/memory.c:2060 [inline]
 unmap_vmas+0x399/0x580 mm/memory.c:2104
 exit_mmap+0x240/0xb40 mm/mmap.c:1280
 __mmput+0x118/0x430 kernel/fork.c:1133
 exit_mm+0x1da/0x2c0 kernel/exit.c:582
 do_exit+0x648/0x2300 kernel/exit.c:954
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbb4138eec9
Code: Unable to access opcode bytes at 0x7fbb4138ee9f.
RSP: 002b:00007fbb421480e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fbb415e5fa8 RCX: 00007fbb4138eec9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fbb415e5fac
RBP: 00007fbb415e5fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbb415e6038 R14: 00007ffc8b2daca0 R15: 00007ffc8b2dad88
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 df                	mov    %ebx,%edi
   2:	4c 89 f6             	mov    %r14,%rsi
   5:	e8 c4 34 b5 ff       	call   0xffb534ce
   a:	4c 39 f3             	cmp    %r14,%rbx
   d:	75 0b                	jne    0x1a
   f:	e8 5a 32 b5 ff       	call   0xffb5326e
  14:	90                   	nop
  15:	0f 0b                	ud2
  17:	90                   	nop
  18:	eb 41                	jmp    0x5b
  1a:	48 c7 c0 80 17 9e 8f 	mov    $0xffffffff8f9e1780,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
* 2a:	74 0c                	je     0x38 <-- trapping instruction
  2c:	48 c7 c7 80 17 9e 8f 	mov    $0xffffffff8f9e1780,%rdi
  33:	e8 66 d0 1a 00       	call   0x1ad09e
  38:	4c 8b 35 af b5 93 0d 	mov    0xd93b5af(%rip),%r14        # 0xd93b5ee
  3f:	4d                   	rex.WRB