------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88802a69e278 object type: timer_list hint: br_ip6_multicast_port_query_expired+0x0/0x380 net/bridge/br_multicast.c:-1
WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#1: syz.5.7264/32733
WARNING: lib/debugobjects.c:632 at __debug_check_no_obj_freed lib/debugobjects.c:1116 [inline], CPU#1: syz.5.7264/32733
WARNING: lib/debugobjects.c:632 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1146, CPU#1: syz.5.7264/32733
Modules linked in:
CPU: 1 UID: 0 PID: 32733 Comm: syz.5.7264 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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 17 9d 75 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 c0 12 28 8c 48 c7 c2 40 18 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:ffffc90000a08c90 EFLAGS: 00010246
RAX: ffffffff8a7ea7e0 RBX: ffffffff9a4940a8 RCX: 0000000000000000
RDX: ffffffff8c281840 RSI: ffffffff8c2812c0 RDI: ffffffff901cc280
RBP: ffffffff8bcf3e20 R08: ffff88802a69e278 R09: ffffffff8bcf5140
R10: dffffc0000000000 R11: ffffffff81b1d530 R12: ffff88802a69e400
R13: ffffffff901cc280 R14: ffff88802a69e000 R15: ffff88802a69e278
FS:  00007f2aecb286c0(0000) GS:ffff88812554b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000003a9030 CR3: 0000000046be6000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:2616 [inline]
 slab_free mm/slub.c:6165 [inline]
 kfree+0x13a/0x630 mm/slub.c:6483
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x228/0x560 lib/kobject.c:737
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
 sysvec_call_function_single+0xa3/0xc0 arch/x86/kernel/smp.c:266
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:704
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:194
Code: f7 e8 bd ae ee f5 f7 c3 00 02 00 00 74 05 e8 90 1f 1a 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> c4 68 e0 f5 65 8b 05 2d ef 69 07 85 c0 74 18 5b 41 5e e9 91 48
RSP: 0018:ffffc90003d37968 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8df01660 RDI: 0000000000000001
RBP: 1ffff11006318384 R08: ffffffff9011fab7 R09: 1ffffffff2023f56
R10: dffffc0000000000 R11: fffffbfff2023f57 R12: ffff88802b1d8b10
R13: dffffc0000000000 R14: ffff88802b1d8b18 R15: ffff88802b1d8b18
 spin_unlock_irqrestore include/linux/spinlock.h:407 [inline]
 class_spinlock_irqsave_destructor include/linux/spinlock.h:618 [inline]
 snd_seq_prioq_cell_in+0x65e/0x7f0 sound/core/seq/seq_prioq.c:196
 snd_seq_enqueue_event+0x38d/0x5c0 sound/core/seq/seq_queue.c:-1
 snd_seq_client_enqueue_event+0x354/0x4e0 sound/core/seq/seq_clientmgr.c:917
 snd_seq_write+0x5cb/0x820 sound/core/seq/seq_clientmgr.c:1055
 vfs_write+0x29a/0xb90 fs/read_write.c:686
 ksys_write+0x150/0x270 fs/read_write.c:740
 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: 0033:0x7f2aef99c819
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:00007f2aecb28028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2aefc16540 RCX: 00007f2aef99c819
RDX: 000000000000ffc8 RSI: 0000200000000000 RDI: 000000000000000a
RBP: 00007f2aefa32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2aefc165d8 R14: 00007f2aefc16540 R15: 00007f2aefd3fa48
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 44 24 20          	mov    %eax,0x20(%rsp)
   4:	e8 17 9d 75 fd       	call   0xfd759d20
   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 c0 12 28 8c 	mov    $0xffffffff8c2812c0,%rsi
  1c:	48 c7 c2 40 18 28 8c 	mov    $0xffffffff8c281840,%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