Kernel bug: WARNING: ODEBUG bug in handle_softirqs
Subsystem: hams
Status: open

Crash report:
------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888075566090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:615 at debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612, CPU#1: kworker/1:2H/6077
Modules linked in:
CPU: 1 UID: 0 PID: 6077 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+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 57 da 85 fd 4d 8b 0f 48 c7 c7 80 3b e1 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 aa b7 e1 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 07 ae 1d 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a00 EFLAGS: 00010296
RAX: 5542735ed4cac000 RBX: dffffc0000000000 RCX: ffff888034443d00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffffffff8fbf8c77 R09: 1ffffffff1f7f18e
R10: dffffc0000000000 R11: fffffbfff1f7f18f R12: ffffffff8a543fe0
R13: ffffffff8be13d00 R14: ffff888075566090 R15: ffffffff8b8cf880
FS:  0000000000000000(0000) GS:ffff888125b76000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000000e138000 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:6665 [inline]
 kfree+0x10c/0x6e0 mm/slub.c:6873
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x16e/0x600 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+0x27d/0x880 kernel/softirq.c:626
 __do_softirq kernel/softirq.c:660 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:727
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:743
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1055 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1055
 </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:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 3b e4 62 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> f3 74 2a f6 65 8b 05 bc 2f 54 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc90003e7f8c0 EFLAGS: 00000206
RAX: 5542735ed4cac000 RBX: 0000000000000a06 RCX: 5542735ed4cac000
RDX: 0000000000000006 RSI: ffffffff8da8bedc RDI: 0000000000000001
RBP: ffffc90003e7f958 R08: ffffffff8fbf8c77 R09: 1ffffffff1f7f18e
R10: dffffc0000000000 R11: fffffbfff1f7f18f R12: dffffc0000000000
R13: ffff88802f729418 R14: ffff88802f729438 R15: 1ffff920007cff18
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 class_spinlock_irqsave_destructor include/linux/spinlock.h:585 [inline]
 snd_rawmidi_transmit+0xc9/0x100 sound/core/rawmidi.c:1493
 snd_vmidi_output_work+0x1a3/0x410 sound/core/seq/seq_virmidi.c:151
 process_one_work+0x93a/0x15e0 kernel/workqueue.c:3261
 process_scheduled_works kernel/workqueue.c:3344 [inline]
 worker_thread+0x9b0/0xee0 kernel/workqueue.c:3425
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 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 3b e4 62 f6       	call   0xf662e442
   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 f3 74 2a f6       	call   0xf62a7522 <-- trapping instruction
  2f:	65 8b 05 bc 2f 54 07 	mov    %gs:0x7542fbc(%rip),%eax        # 0x7542ff2
  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