------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88802821ec90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:643 at debug_print_object lib/debugobjects.c:640 [inline], CPU#1: syz-executor/5832
WARNING: lib/debugobjects.c:643 at __debug_check_no_obj_freed lib/debugobjects.c:1127 [inline], CPU#1: syz-executor/5832
WARNING: lib/debugobjects.c:643 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1157, CPU#1: syz-executor/5832
Modules linked in:
CPU: 1 UID: 0 PID: 5832 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:debug_print_object lib/debugobjects.c:640 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1127 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1157
Code: 89 44 24 20 e8 57 45 6a fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 c0 62 4a 8c 48 c7 c2 40 68 4a 8c 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: 0018:ffffc90000a08b48 EFLAGS: 00010246
RAX: ffffffff8aa6dc10 RBX: ffffffff9a8e47e0 RCX: 0000000000000000
RDX: ffffffff8c4a6840 RSI: ffffffff8c4a62c0 RDI: ffffffff905f2b00
RBP: ffffffff8bef42e0 R08: ffff88802821ec90 R09: ffffffff8bef5640
R10: dffffc0000000000 R11: ffffffff81b34c70 R12: ffff88802821ee00
R13: ffffffff905f2b00 R14: ffff88802821e000 R15: ffff88802821ec90
FS:  000055557155a500(0000) GS:ffff888124ee0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8a2b3456b8 CR3: 0000000031d1a000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:2620 [inline]
 slab_free mm/slub.c:6242 [inline]
 kfree+0x13e/0x650 mm/slub.c:6557
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404
 handle_softirqs+0x22a/0x870 kernel/softirq.c:626
 __do_softirq kernel/softirq.c:660 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:739
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:756
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872
Code: e9 30 ff ff ff e8 55 2f 1c 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 01 1c c1 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d be c0 b4
RSP: 0018:ffffc90003bc71f0 EFLAGS: 00000296
RAX: 862c223afa387e00 RBX: 0000000000000246 RCX: 0000000080000003
RDX: 000000008f102169 RSI: ffffffff8e4a660a RDI: ffffffff8c4a5c80
RBP: 0000000000000000 R08: ffffffff823c02ca R09: ffffffff8eb5d760
R10: dffffc0000000000 R11: fffff9400031c5d1 R12: 0000000000000002
R13: ffffffff8eb5d760 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock_sched include/linux/rcupdate.h:948 [inline]
 pfn_valid+0xd6/0x480 include/linux/mmzone.h:2289
 page_table_check_set+0x25/0x510 mm/page_table_check.c:105
 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
 set_ptes include/linux/pgtable.h:413 [inline]
 __copy_present_ptes mm/memory.c:1102 [inline]
 copy_present_ptes mm/memory.c:1181 [inline]
 copy_pte_range mm/memory.c:1304 [inline]
 copy_pmd_range+0x49ec/0x5be0 mm/memory.c:1392
 copy_pud_range mm/memory.c:1429 [inline]
 copy_p4d_range mm/memory.c:1453 [inline]
 copy_page_range+0xbd3/0x11f0 mm/memory.c:1539
 dup_mmap+0xf2b/0x1d90 mm/mmap.c:1841
 dup_mm kernel/fork.c:1536 [inline]
 copy_mm+0x14d/0x690 kernel/fork.c:1588
 copy_process+0x1efd/0x4430 kernel/fork.c:2263
 kernel_clone+0x248/0x8e0 kernel/fork.c:2711
 __do_sys_clone kernel/fork.c:2853 [inline]
 __se_sys_clone kernel/fork.c:2836 [inline]
 __x64_sys_clone+0x1e4/0x260 kernel/fork.c:2836
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8a2a5c5212
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 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 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007fff894562a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fff894562a0 RCX: 00007f8a2a5c5212
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fff8945642c R08: 0000000000000000 R09: 0000000000000001
R10: 000055557155a7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 0000000000044b03 R15: 00007fff89456480
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 44 24 20          	mov    %eax,0x20(%rsp)
   4:	e8 57 45 6a fd       	call   0xfd6a4560
   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 c0 62 4a 8c 	mov    $0xffffffff8c4a62c0,%rsi
  1c:	48 c7 c2 40 68 4a 8c 	mov    $0xffffffff8c4a6840,%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