------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88802f7c4890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:615 at 0x0, CPU#0: syz-executor/16576
Modules linked in:
CPU: 0 UID: 0 PID: 16576 Comm: syz-executor 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 lib/debugobjects.c:612 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1129
Code: 89 44 24 20 e8 37 6a 87 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 a0 ed e1 8b 48 c7 c2 c0 f2 e1 8b 8b 0c 24 4d 89 f8 50 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc
RSP: 0000:ffffc90000007a70 EFLAGS: 00010246
RAX: ffffffff8a53bf10 RBX: ffffffff99ecad68 RCX: 0000000000000000
RDX: ffffffff8be1f2c0 RSI: ffffffff8be1eda0 RDI: ffffffff8fcd2fb0
RBP: ffffffff8b8d2480 R08: ffff88802f7c4890 R09: ffffffff8b8d35e0
R10: dffffc0000000000 R11: ffffffff81aef970 R12: ffff88802f7c4a00
R13: ffffffff8fcd2fb0 R14: ffff88802f7c4000 R15: ffff88802f7c4890
FS:  000055558ff92500(0000) GS:ffff888125a03000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f73f23572c0 CR3: 000000007ad8c000 CR4: 00000000003526f0
DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000404
DR3: ffffffffefffff14 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:2471 [inline]
 slab_free mm/slub.c:6663 [inline]
 kfree+0x13b/0x660 mm/slub.c:6871
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x16e/0x590 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+0x27d/0x850 kernel/softirq.c:626
 __do_softirq kernel/softirq.c:660 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:727
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:743
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x11/0x70 kernel/kcov.c:217
Code: 5b e9 73 25 5b 00 cc cc cc 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 d0 c1 92 <65> 8b 15 e8 dc ff 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75
RSP: 0000:ffffc9000256f818 EFLAGS: 00000246
RAX: ffffffff8233f01e RBX: 000000000007ed59 RCX: ffff888032583d00
RDX: 0000000000000000 RSI: 000000000007ed59 RDI: 0000000400000000
RBP: ffffea0001fb5640 R08: ffffea0001fb5647 R09: 1ffffd40003f6ac8
R10: dffffc0000000000 R11: fffff940003f6ac9 R12: dffffc0000000000
R13: 000000007ed59025 R14: 000000000007ed59 R15: 0000000000000001
 pfn_valid+0x42e/0x490 include/linux/mmzone.h:2180
 page_table_check_set+0x25/0x610 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]
 set_pte_range+0x848/0x8a0 mm/memory.c:5483
 filemap_map_order0_folio mm/filemap.c:3856 [inline]
 filemap_map_pages+0xfcd/0x1fd0 mm/filemap.c:3921
 do_fault_around mm/memory.c:5713 [inline]
 do_read_fault mm/memory.c:5746 [inline]
 do_fault mm/memory.c:5889 [inline]
 do_pte_missing+0x20b0/0x3330 mm/memory.c:4401
 handle_pte_fault mm/memory.c:6273 [inline]
 __handle_mm_fault mm/memory.c:6411 [inline]
 handle_mm_fault+0x1b26/0x32b0 mm/memory.c:6580
 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f73f23572c0
Code: 20 0f 82 a3 00 00 00 c5 fe 6f 06 48 83 fa 40 0f 87 32 01 00 00 c5 fe 6f 4c 16 e0 c5 fe 7f 07 c5 fe 7f 4c 17 e0 eb 6a 0f 1f 00 <48> 89 f8 48 01 d0 eb 3b 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 2e
RSP: 002b:00007ffeb0ddd9f8 EFLAGS: 00010212
RAX: 00000000000003c0 RBX: 0000000000000016 RCX: 0000000000000000
RDX: 0000000000000016 RSI: 00007f73f24157ac RDI: 00007ffeb0dde290
RBP: 0000000000000016 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f73f24157c2
R13: 0000000000000016 R14: 00007ffeb0dddfa0 R15: 00007ffeb0dddfa0
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 44 24 20          	mov    %eax,0x20(%rsp)
   4:	e8 37 6a 87 fd       	call   0xfd876a40
   9:	48 8b 44 24 20       	mov    0x20(%rsp),%rax
   e:	4c 8b 4d 00          	mov    0x0(%rbp),%r9
  12:	4c 89 ef             	mov    %r13,%rdi
  15:	48 c7 c6 a0 ed e1 8b 	mov    $0xffffffff8be1eda0,%rsi
  1c:	48 c7 c2 c0 f2 e1 8b 	mov    $0xffffffff8be1f2c0,%rdx
  23:	8b 0c 24             	mov    (%rsp),%ecx
  26:	4d 89 f8             	mov    %r15,%r8
  29:	50                   	push   %rax
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 83 c4 08          	add    $0x8,%rsp
  33:	4c 8b 6c 24 18       	mov    0x18(%rsp),%r13
  38:	48                   	rex.W
  39:	b9 00 00 00 00       	mov    $0x0,%ecx
  3e:	00 fc                	add    %bh,%ah