------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88806be28890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 3158 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 3158 Comm: syz.4.8530 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 87 9e 8d fd 4d 8b 0f 48 c7 c7 00 45 c0 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 0a 11 ec fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 67 57 07 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a10 EFLAGS: 00010292
RAX: cf96d7919670e000 RBX: dffffc0000000000 RCX: ffff888048a30000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa138 R12: ffffffff8a37b1e0
R13: ffffffff8bc04680 R14: ffff88806be28890 R15: ffffffff8b6ce100
FS:  00007fa852d6f6c0(0000) GS:ffff888125e3b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa852d6ef98 CR3: 0000000075b0a000 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:2353 [inline]
 slab_free mm/slub.c:4695 [inline]
 kfree+0x112/0x440 mm/slub.c:4894
 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:queued_spin_trylock include/asm-generic/qspinlock.h:92 [inline]
RIP: 0010:do_raw_spin_trylock+0x80/0x180 kernel/locking/spinlock_debug.c:123
Code: f1 f1 04 f3 f3 f3 4b 89 04 3c be 04 00 00 00 e8 36 be 86 00 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 c4 00 00 00 8b 03 <89> 44 24 20 85 c0 0f 85 b2 00 00 00 4c 8d 74 24 20 48 89 df be 04
RSP: 0018:ffffc900052af0c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b873fd40 RCX: ffffffff819d09aa
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b873fd40
RBP: ffffc900052af158 R08: ffff8880b873fd43 R09: 1ffff110170e7fa8
R10: dffffc0000000000 R11: ffffed10170e7fa9 R12: 1ffff92000a55e18
R13: ffff88813fffd998 R14: ffff8880b873fd40 R15: dffffc0000000000
 __raw_spin_trylock include/linux/spinlock_api_smp.h:89 [inline]
 _raw_spin_trylock+0x21/0x80 kernel/locking/spinlock.c:138
 spin_trylock include/linux/spinlock.h:361 [inline]
 rmqueue_pcplist mm/page_alloc.c:3285 [inline]
 rmqueue mm/page_alloc.c:3329 [inline]
 get_page_from_freelist+0x63b/0x22c0 mm/page_alloc.c:3855
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
 folio_alloc_mpol_noprof+0x39/0x70 mm/mempolicy.c:2435
 shmem_alloc_folio mm/shmem.c:1908 [inline]
 shmem_alloc_and_add_folio+0x447/0xf60 mm/shmem.c:1947
 shmem_get_folio_gfp+0x59d/0x1660 mm/shmem.c:2597
 shmem_fault+0x179/0x390 mm/shmem.c:2798
 __do_fault+0x138/0x390 mm/memory.c:5152
 do_read_fault mm/memory.c:5573 [inline]
 do_fault mm/memory.c:5707 [inline]
 do_pte_missing mm/memory.c:4234 [inline]
 handle_pte_fault mm/memory.c:6052 [inline]
 __handle_mm_fault+0x3611/0x5440 mm/memory.c:6195
 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6364
 faultin_page mm/gup.c:1144 [inline]
 __get_user_pages+0x1699/0x2ce0 mm/gup.c:1446
 populate_vma_page_range+0x29f/0x3a0 mm/gup.c:1880
 __mm_populate+0x24c/0x380 mm/gup.c:1983
 mm_populate include/linux/mm.h:3367 [inline]
 vm_mmap_pgoff+0x387/0x4d0 mm/util.c:585
 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: 0033:0x7fa851f8eec9
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:00007fa852d6f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fa8521e6180 RCX: 00007fa851f8eec9
RDX: b635773f05ebbee1 RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007fa852011f91 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa8521e6218 R14: 00007fa8521e6180 R15: 00007fff0d0b49a8
 </TASK>
----------------
Code disassembly (best guess):
   0:	f1                   	int1
   1:	f1                   	int1
   2:	04 f3                	add    $0xf3,%al
   4:	f3 f3 4b 89 04 3c    	repz xrelease mov %rax,(%r12,%r15,1)
   a:	be 04 00 00 00       	mov    $0x4,%esi
   f:	e8 36 be 86 00       	call   0x86be4a
  14:	48 89 d8             	mov    %rbx,%rax
  17:	48 c1 e8 03          	shr    $0x3,%rax
  1b:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax
  20:	84 c0                	test   %al,%al
  22:	0f 85 c4 00 00 00    	jne    0xec
  28:	8b 03                	mov    (%rbx),%eax
* 2a:	89 44 24 20          	mov    %eax,0x20(%rsp) <-- trapping instruction
  2e:	85 c0                	test   %eax,%eax
  30:	0f 85 b2 00 00 00    	jne    0xe8
  36:	4c 8d 74 24 20       	lea    0x20(%rsp),%r14
  3b:	48 89 df             	mov    %rbx,%rdi
  3e:	be                   	.byte 0xbe
  3f:	04                   	.byte 0x4