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ODEBUG: free active (active state 0) object: ffff8880303c9c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 12233 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 12233 Comm: syz.3.1682 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 67 cb 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 9a 23 f0 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 77 52 ea 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a00 EFLAGS: 00010296
RAX: 348aa68d401c8200 RBX: dffffc0000000000 RCX: ffff88804d730000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba684 R12: ffffffff8a3ada40
R13: ffffffff8bbf1400 R14: ffff8880303c9c90 R15: ffffffff8b6cf7e0
FS:  00007f1e47f446c0(0000) GS:ffff888126231000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc0af7156c0 CR3: 00000000339e8000 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:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x61a/0x860 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404
 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:check_preemption_disabled+0x17/0x120 lib/smp_processor_id.c:14
Code: 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 48 83 ec 10 65 48 8b 05 de 64 26 07 48 89 44 24 08 <65> 8b 05 e6 64 26 07 65 8b 0d db 64 26 07 f7 c1 ff ff ff 7f 74 23
RSP: 0018:ffffc90003987550 EFLAGS: 00000286
RAX: 348aa68d401c8200 RBX: 0000200000840000 RCX: 0000000000000002
RDX: ffff88804d730000 RSI: ffffffff8bbf08c0 RDI: ffffffff8bbf0880
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8211e049
R10: dffffc0000000000 R11: fffff940003ab659 R12: 1ffffd40003ab658
R13: 00000000487a2007 R14: ffff88804b1bc020 R15: ffffc90003987618
 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
 rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:751
 rcu_read_lock include/linux/rcupdate.h:868 [inline]
 ___pte_offset_map+0x62/0x250 mm/pgtable-generic.c:286
 __pte_offset_map include/linux/mm.h:3125 [inline]
 __pte_offset_map_lock+0x46/0x210 mm/pgtable-generic.c:397
 pte_offset_map_lock include/linux/mm.h:3140 [inline]
 filemap_map_pages+0x8ac/0x2000 mm/filemap.c:3843
 do_fault_around mm/memory.c:5674 [inline]
 do_read_fault mm/memory.c:5707 [inline]
 do_fault mm/memory.c:5850 [inline]
 do_pte_missing mm/memory.c:4362 [inline]
 handle_pte_fault mm/memory.c:6195 [inline]
 __handle_mm_fault+0x347e/0x5400 mm/memory.c:6336
 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6505
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x165c/0x2a00 mm/gup.c:1428
 populate_vma_page_range+0x29f/0x3a0 mm/gup.c:1860
 __mm_populate+0x24c/0x380 mm/gup.c:1963
 mm_populate include/linux/mm.h:3478 [inline]
 vm_mmap_pgoff+0x387/0x4d0 mm/util.c:586
 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: 0033:0x7f1e4718f749
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:00007f1e47f44038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f1e473e5fa0 RCX: 00007f1e4718f749
RDX: b635773f05ebbee1 RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f1e47213f91 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1e473e6038 R14: 00007f1e473e5fa0 R15: 00007ffcc916af88
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	55                   	push   %rbp
  14:	41 57                	push   %r15
  16:	41 56                	push   %r14
  18:	53                   	push   %rbx
  19:	48 83 ec 10          	sub    $0x10,%rsp
  1d:	65 48 8b 05 de 64 26 	mov    %gs:0x72664de(%rip),%rax        # 0x7266503
  24:	07
  25:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
* 2a:	65 8b 05 e6 64 26 07 	mov    %gs:0x72664e6(%rip),%eax        # 0x7266517 <-- trapping instruction
  31:	65 8b 0d db 64 26 07 	mov    %gs:0x72664db(%rip),%ecx        # 0x7266513
  38:	f7 c1 ff ff ff 7f    	test   $0x7fffffff,%ecx
  3e:	74 23                	je     0x63