------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88806fd47c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#1: syz.3.6570/447
WARNING: lib/debugobjects.c:632 at __debug_check_no_obj_freed lib/debugobjects.c:1116 [inline], CPU#1: syz.3.6570/447
WARNING: lib/debugobjects.c:632 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1146, CPU#1: syz.3.6570/447
Modules linked in:
CPU: 1 UID: 0 PID: 447 Comm: syz.3.6570 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:debug_print_object lib/debugobjects.c:629 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1116 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1146
Code: 89 44 24 20 e8 f7 bf 74 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 a0 a5 28 8c 48 c7 c2 20 ab 28 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: ffffffff8a9f6db0 RBX: ffffffff9a6d02b8 RCX: 0000000000000000
RDX: ffffffff8c28ab20 RSI: ffffffff8c28a5a0 RDI: ffffffff903e6a40
RBP: ffffffff8bcf39a0 R08: ffff88806fd47c90 R09: ffffffff8bcf4d00
R10: dffffc0000000000 R11: ffffffff81b236d0 R12: ffff88806fd47e00
R13: ffffffff903e6a40 R14: ffff88806fd47000 R15: ffff88806fd47c90
FS:  0000555571e62500(0000) GS:ffff888125313000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30c23ffc CR3: 000000007b0b0000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:2620 [inline]
 slab_free mm/slub.c:6246 [inline]
 kfree+0x13e/0x640 mm/slub.c:6561
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x22a/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198
Code: f7 e8 8d e4 e6 f5 f7 c3 00 02 00 00 74 05 e8 90 6f 12 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> d4 66 d8 f5 65 8b 05 1d 43 85 07 85 c0 74 18 5b 41 5e e9 41 48
RSP: 0018:ffffc9000db2fb78 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000292 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8dfd8f45 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff903386f7 R09: 1ffffffff20670de
R10: dffffc0000000000 R11: fffffbfff20670df R12: dffffc0000000000
R13: 0000000000000002 R14: ffffffff9a71d4e0 R15: ffffc9000db2fe40
 debug_hrtimer_init_on_stack kernel/time/hrtimer.c:480 [inline]
 debug_setup_on_stack kernel/time/hrtimer.c:522 [inline]
 hrtimer_setup_sleeper_on_stack+0x24/0x80 kernel/time/hrtimer.c:2260
 futex_setup_timer+0x48/0xd0 kernel/futex/core.c:469
 futex_wait+0x105/0x390 kernel/futex/waitwake.c:716
 do_futex+0x333/0x420 kernel/futex/syscalls.c:130
 __do_sys_futex kernel/futex/syscalls.c:207 [inline]
 __se_sys_futex+0x3a8/0x450 kernel/futex/syscalls.c:188
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f956f19cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff4d9abaf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000000dd431 RCX: 00007f956f19cdd9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f956f41609c
RBP: 0000000000000032 R08: 3fffffffffffffff R09: 0000000000000000
R10: 00007fff4d9abc00 R11: 0000000000000246 R12: 00007fff4d9abc20
R13: 00007f956f41609c R14: 00000000000dd463 R15: 00007fff4d9abc00
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 44 24 20          	mov    %eax,0x20(%rsp)
   4:	e8 f7 bf 74 fd       	call   0xfd74c000
   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 a5 28 8c 	mov    $0xffffffff8c28a5a0,%rsi
  1c:	48 c7 c2 20 ab 28 8c 	mov    $0xffffffff8c28ab20,%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