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ODEBUG: free active (active state 0) object: ffff888053e4a490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 26227 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 26227 Comm: syz.2.21825 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 17 e0 92 fd 4d 8b 0f 48 c7 c7 80 12 bf 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 5a 3a f0 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 37 4f ea 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a00 EFLAGS: 00010296
RAX: 0871227dcd886600 RBX: dffffc0000000000 RCX: ffff88802f2b1e40
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba684 R12: ffffffff8a39d970
R13: ffffffff8bbf1400 R14: ffff888053e4a490 R15: ffffffff8b6cf7e0
FS:  0000000000000000(0000) GS:ffff888126235000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f68201fc044 CR3: 0000000076c9e000 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:2474 [inline]
 slab_free mm/slub.c:6642 [inline]
 kfree+0x115/0x6d0 mm/slub.c:6849
 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+0x286/0x870 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:697
RIP: 0010:pfn_valid+0x262/0x490 include/linux/mmzone.h:2196
Code: ff e9 a3 00 00 00 e8 fd 4e 16 09 89 c5 31 ff 89 c6 e8 22 0e 8f ff 85 ed 74 64 80 3d d9 f6 35 0d 01 75 62 e8 d0 09 8f ff eb 7f <e8> c9 09 8f ff bd 01 00 00 00 e9 b4 00 00 00 e8 ba 09 8f ff 4d 85
RSP: 0018:ffffc90011caf318 EFLAGS: 00000202
RAX: ffffffff8230f95d RBX: ffffffff8230f84a RCX: ffff88802f2b1e40
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
RBP: 0000000000000002 R08: 0000000000000000 R09: ffffffff8230f84a
R10: dffffc0000000000 R11: fffff94000356231 R12: dffffc0000000000
R13: 0000000000000008 R14: 000000000006ac46 R15: ffff88813fffa5a0
 page_table_check_clear+0x21/0x700 mm/page_table_check.c:70
 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
 get_and_clear_full_ptes include/linux/pgtable.h:725 [inline]
 zap_present_folio_ptes mm/memory.c:1628 [inline]
 zap_present_ptes mm/memory.c:1710 [inline]
 do_zap_pte_range mm/memory.c:1811 [inline]
 zap_pte_range mm/memory.c:1855 [inline]
 zap_pmd_range mm/memory.c:1947 [inline]
 zap_pud_range mm/memory.c:1976 [inline]
 zap_p4d_range mm/memory.c:1997 [inline]
 unmap_page_range+0x344b/0x4370 mm/memory.c:2018
 unmap_single_vma mm/memory.c:2061 [inline]
 unmap_vmas+0x399/0x580 mm/memory.c:2105
 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: 0033:0x7f3b88d8f749
Code: Unable to access opcode bytes at 0x7f3b88d8f71f.
RSP: 002b:00007f3b86fb40e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f3b88fe6188 RCX: 00007f3b88d8f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3b88fe6188
RBP: 00007f3b88fe6180 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3b88fe6218 R14: 00007ffcea41f8e0 R15: 00007ffcea41f9c8
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	e9 a3 00 00 00       	jmp    0xa8
   5:	e8 fd 4e 16 09       	call   0x9164f07
   a:	89 c5                	mov    %eax,%ebp
   c:	31 ff                	xor    %edi,%edi
   e:	89 c6                	mov    %eax,%esi
  10:	e8 22 0e 8f ff       	call   0xff8f0e37
  15:	85 ed                	test   %ebp,%ebp
  17:	74 64                	je     0x7d
  19:	80 3d d9 f6 35 0d 01 	cmpb   $0x1,0xd35f6d9(%rip)        # 0xd35f6f9
  20:	75 62                	jne    0x84
  22:	e8 d0 09 8f ff       	call   0xff8f09f7
  27:	eb 7f                	jmp    0xa8
* 29:	e8 c9 09 8f ff       	call   0xff8f09f7 <-- trapping instruction
  2e:	bd 01 00 00 00       	mov    $0x1,%ebp
  33:	e9 b4 00 00 00       	jmp    0xec
  38:	e8 ba 09 8f ff       	call   0xff8f09f7
  3d:	4d                   	rex.WRB
  3e:	85                   	.byte 0x85