------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88802685fc90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 6417 at lib/debugobjects.c:615 debug_print_object lib/debugobjects.c:612 [inline]
WARNING: CPU: 1 PID: 6417 at lib/debugobjects.c:615 __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
WARNING: CPU: 1 PID: 6417 at lib/debugobjects.c:615 debug_check_no_obj_freed+0x447/0x540 lib/debugobjects.c:1129
Modules linked in:
CPU: 1 UID: 0 PID: 6417 Comm: kworker/1:2H Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events_highpri snd_vmidi_output_work
RIP: 0010:debug_print_object lib/debugobjects.c:612 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
RIP: 0010:debug_check_no_obj_freed+0x447/0x540 lib/debugobjects.c:1129
Code: 4c 8b 4d 00 48 c7 c7 00 72 7f 8b 48 c7 c6 80 6e 7f 8b 48 c7 c2 80 73 7f 8b 8b 0c 24 4d 89 f8 41 55 e8 dd d0 f2 fc 48 83 c4 08 <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 de 74 a6
RSP: 0018:ffffc90000a08a70 EFLAGS: 00010292
RAX: 022b2fdf83391100 RBX: ffffffff994c9208 RCX: ffff88802c7e8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8b2cfa40 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1b3a128 R12: ffff88802685fe00
R13: ffffffff8a116330 R14: ffff88802685f000 R15: ffff88802685fc90
FS:  0000000000000000(0000) GS:ffff888126778000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 0000000032742000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:2474 [inline]
 slab_free mm/slub.c:6638 [inline]
 kfree+0x10d/0x6b0 mm/slub.c:6845
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4c7/0x5f0 net/rose/rose_timer.c:183
 call_timer_fn+0x17a/0x5d0 kernel/time/timer.c:1747
 expire_timers kernel/time/timer.c:1798 [inline]
 __run_timers kernel/time/timer.c:2372 [inline]
 __run_timer_base+0x616/0x860 kernel/time/timer.c:2384
 run_timer_base kernel/time/timer.c:2393 [inline]
 run_timer_softirq+0xb3/0x170 kernel/time/timer.c:2403
 handle_softirqs+0x282/0x850 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xc6/0x1e0 kernel/softirq.c:723
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa4/0x100 kernel/locking/spinlock.c:194
Code: 74 05 e8 ff f9 af f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> b7 b7 78 f6 65 8b 05 e0 ee 03 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900038df620 EFLAGS: 00000206
RAX: 022b2fdf83391100 RBX: 0000000000000a02 RCX: 022b2fdf83391100
RDX: 0000000000000007 RSI: ffffffff8d2d07b4 RDI: 0000000000000001
RBP: ffffc900038df6b0 R08: ffffffff8f35f777 R09: 1ffffffff1e6beee
R10: dffffc0000000000 R11: fffffbfff1e6beef R12: dffffc0000000000
R13: ffff88802edd6800 R14: ffffffff8edcf460 R15: 1ffff9200071bec4
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 class_spinlock_irqsave_destructor include/linux/spinlock.h:585 [inline]
 client_use_ptr sound/core/seq/seq_clientmgr.c:118 [inline]
 snd_seq_client_use_ptr sound/core/seq/seq_clientmgr.c:166 [inline]
 get_event_dest_client sound/core/seq/seq_clientmgr.c:499 [inline]
 _snd_seq_deliver_single_event sound/core/seq/seq_clientmgr.c:615 [inline]
 snd_seq_deliver_single_event+0x16b/0xc90 sound/core/seq/seq_clientmgr.c:660
 __deliver_to_subscribers sound/core/seq/seq_clientmgr.c:707 [inline]
 deliver_to_subscribers sound/core/seq/seq_clientmgr.c:735 [inline]
 snd_seq_deliver_event+0x534/0x9b0 sound/core/seq/seq_clientmgr.c:785
 snd_seq_kernel_client_dispatch+0x2bc/0x3f0 sound/core/seq/seq_clientmgr.c:2407
 snd_vmidi_output_work+0x24a/0x410 sound/core/seq/seq_virmidi.c:157
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xadd/0x1780 kernel/workqueue.c:3346
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3427
 kthread+0x70d/0x890 kernel/kthread.c:463
 ret_from_fork+0x4b4/0x840 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:	74 05                	je     0x7
   2:	e8 ff f9 af f6       	call   0xf6affa06
   7:	48 c7 44 24 20 00 00 	movq   $0x0,0x20(%rsp)
   e:	00 00
  10:	9c                   	pushf
  11:	8f 44 24 20          	pop    0x20(%rsp)
  15:	f6 44 24 21 02       	testb  $0x2,0x21(%rsp)
  1a:	75 4f                	jne    0x6b
  1c:	f7 c3 00 02 00 00    	test   $0x200,%ebx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 b7 b7 78 f6       	call   0xf678b7e6 <-- trapping instruction
  2f:	65 8b 05 e0 ee 03 07 	mov    %gs:0x703eee0(%rip),%eax        # 0x703ef16
  36:	85 c0                	test   %eax,%eax
  38:	74 40                	je     0x7a
  3a:	48                   	rex.W
  3b:	c7                   	.byte 0xc7
  3c:	04 24                	add    $0x24,%al
  3e:	0e                   	(bad)
  3f:	36                   	ss