------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888027695890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 8289 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 8289 Comm: kworker/u8:15 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: netns cleanup_net
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 67 e4 92 fd 4d 8b 0f 48 c7 c7 00 11 bf 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 1a 49 f0 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 17 3f ea 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a00 EFLAGS: 00010296
RAX: 26f3e38baf6f8c00 RBX: dffffc0000000000 RCX: ffff88804cd58000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba680 R12: ffffffff8a396860
R13: ffffffff8bbf1280 R14: ffff888027695890 R15: ffffffff8b6cf7a0
FS:  0000000000000000(0000) GS:ffff88812623b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c39df31 CR3: 0000000025532000 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:2470 [inline]
 slab_free mm/slub.c:6630 [inline]
 kfree+0x115/0x6d0 mm/slub.c:6837
 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+0x286/0x870 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:697
RIP: 0010:lockdep_unregister_key+0x2c5/0x310 kernel/locking/lockdep.c:6616
Code: 65 48 8b 05 7d d8 d0 10 48 3b 44 24 10 0f 84 26 fe ff ff e8 2d 39 a9 09 e8 58 3a a9 09 41 f7 c7 00 02 00 00 74 bd fb 40 84 ed <75> bc eb cd 90 0f 0b 90 e9 19 ff ff ff 90 0f 0b 90 e9 2a ff ff ff
RSP: 0018:ffffc9000b727678 EFLAGS: 00000246
RAX: 26f3e38baf6f8c00 RBX: ffff888029122228 RCX: 26f3e38baf6f8c00
RDX: ffffffff93320358 RSI: ffffffff8d7230c9 RDI: ffffffff8bbf0760
RBP: ffff888029122200 R08: 0000000000000000 R09: ffffffff81aa7618
R10: dffffc0000000000 R11: fffffbfff1ef9ccf R12: 0000000000000000
R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000a07
 __qdisc_destroy+0x166/0x420 net/sched/sch_generic.c:1076
 netdev_for_each_tx_queue include/linux/netdevice.h:2667 [inline]
 dev_shutdown+0x93/0x440 net/sched/sch_generic.c:1487
 unregister_netdevice_many_notify+0x118c/0x2390 net/core/dev.c:12361
 ops_exit_rtnl_list net/core/net_namespace.c:187 [inline]
 ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:248
 cleanup_net+0x4d8/0x820 net/core/net_namespace.c:696
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	65 48 8b 05 7d d8 d0 	mov    %gs:0x10d0d87d(%rip),%rax        # 0x10d0d885
   7:	10
   8:	48 3b 44 24 10       	cmp    0x10(%rsp),%rax
   d:	0f 84 26 fe ff ff    	je     0xfffffe39
  13:	e8 2d 39 a9 09       	call   0x9a93945
  18:	e8 58 3a a9 09       	call   0x9a93a75
  1d:	41 f7 c7 00 02 00 00 	test   $0x200,%r15d
  24:	74 bd                	je     0xffffffe3
  26:	fb                   	sti
  27:	40 84 ed             	test   %bpl,%bpl
* 2a:	75 bc                	jne    0xffffffe8 <-- trapping instruction
  2c:	eb cd                	jmp    0xfffffffb
  2e:	90                   	nop
  2f:	0f 0b                	ud2
  31:	90                   	nop
  32:	e9 19 ff ff ff       	jmp    0xffffff50
  37:	90                   	nop
  38:	0f 0b                	ud2
  3a:	90                   	nop
  3b:	e9 2a ff ff ff       	jmp    0xffffff6a