------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888055b07490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 4174 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 4174 Comm: syz.5.8386 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 56 07 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a10 EFLAGS: 00010292
RAX: 049cc4bf136f0e00 RBX: dffffc0000000000 RCX: ffff88802b653c80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa138 R12: ffffffff8a37af80
R13: ffffffff8bc04680 R14: ffff888055b07490 R15: ffffffff8b6ce100
FS:  00007f403db936c0(0000) GS:ffff888125e3b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002ed2c000 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:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 89 fb e8 23 00 00 00 48 8b 3d a4 da e0 0b 48 89 de 5b e9 e3 d8 59 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 50 8e 92 65 8b 15 a8 34
RSP: 0018:ffffc900107b7ab8 EFLAGS: 00000246
RAX: ffffffff82081f7e RBX: ffff88802ed2c000 RCX: 0000000000080000
RDX: ffffc9000d821000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: dffffc0000000000 R08: ffff88802b653c87 R09: 1ffff110056ca790
R10: dffffc0000000000 R11: ffffed10056ca791 R12: 0000200000945000
R13: 1ffff11005da5840 R14: 1ffff110111cf22a R15: ffff88802ed2c200
 _static_cpu_has arch/x86/include/asm/cpufeature.h:101 [inline]
 p4d_offset arch/x86/include/asm/pgtable.h:1137 [inline]
 follow_p4d_mask mm/gup.c:991 [inline]
 follow_page_mask mm/gup.c:1041 [inline]
 __get_user_pages+0x1a86/0x2ce0 mm/gup.c:1444
 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: 0033:0x7f403cd8eec9
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:00007f403db93038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f403cfe6180 RCX: 00007f403cd8eec9
RDX: 0000000003000002 RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f403ce11f91 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f403cfe6218 R14: 00007f403cfe6180 R15: 00007ffed584f7b8
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 fb                	mov    %edi,%ebx
   2:	e8 23 00 00 00       	call   0x2a
   7:	48 8b 3d a4 da e0 0b 	mov    0xbe0daa4(%rip),%rdi        # 0xbe0dab2
   e:	48 89 de             	mov    %rbx,%rsi
  11:	5b                   	pop    %rbx
  12:	e9 e3 d8 59 00       	jmp    0x59d8fa
  17:	cc                   	int3
  18:	cc                   	int3
  19:	cc                   	int3
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	90                   	nop
  26:	90                   	nop
  27:	90                   	nop
  28:	90                   	nop
  29:	90                   	nop
* 2a:	f3 0f 1e fa          	endbr64 <-- trapping instruction
  2e:	48 8b 04 24          	mov    (%rsp),%rax
  32:	65 48 8b 0c 25 08 50 	mov    %gs:0xffffffff928e5008,%rcx
  39:	8e 92
  3b:	65                   	gs
  3c:	8b                   	.byte 0x8b
  3d:	15                   	.byte 0x15
  3e:	a8 34                	test   $0x34,%al