------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff8880564eda78 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-executor/4496
WARNING: lib/debugobjects.c:632 at __debug_check_no_obj_freed lib/debugobjects.c:1116 [inline], CPU#1: syz-executor/4496
WARNING: lib/debugobjects.c:632 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1146, CPU#1: syz-executor/4496
Modules linked in:
CPU: 1 UID: 0 PID: 4496 Comm: syz-executor 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 47 58 74 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 20 b2 28 8c 48 c7 c2 a0 b7 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:ffffc90000a08c70 EFLAGS: 00010246
RAX: ffffffff8a7da740 RBX: ffffffff9a65def8 RCX: 0000000000000000
RDX: ffffffff8c28b7a0 RSI: ffffffff8c28b220 RDI: ffffffff903b85e0
RBP: ffffffff8bcf3a20 R08: ffff8880564eda78 R09: ffffffff8bcf4d80
R10: dffffc0000000000 R11: ffffffff81b20990 R12: ffff8880564edc00
R13: ffffffff903b85e0 R14: ffff8880564ed000 R15: ffff8880564eda78
FS:  0000555584fd7500(0000) GS:ffff888125390000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f253bdada40 CR3: 000000004ae6a000 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
 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/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:generic_permission+0x7/0x690 fs/namei.c:518
Code: c1 7c b9 4c 89 f7 e8 68 5b eb ff eb af 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 <41> 56 41 55 41 54 53 48 83 ec 30 41 89 d4 49 89 f5 48 89 7c 24 08
RSP: 0018:ffffc900038579b8 EFLAGS: 00000293
RAX: ffffffff82459483 RBX: 1ffff11007b5b6f1 RCX: ffff88802f7dbd80
RDX: 0000000000000081 RSI: ffff88803dadb788 RDI: ffffffff8eae9ac0
RBP: 0000000000000001 R08: ffff88802f7dbd80 R09: 0000000000000002
R10: 000000000000002f R11: 0000000000000000 R12: ffff88803dadb78a
R13: ffff8880a432a000 R14: ffff88803dadb788 R15: 0000000000000081
 do_inode_permission fs/namei.c:585 [inline]
 inode_permission+0x243/0x5f0 fs/namei.c:648
 lookup_inode_permission_may_exec fs/namei.c:691 [inline]
 may_lookup fs/namei.c:1957 [inline]
 link_path_walk+0xc2d/0x18d0 fs/namei.c:2600
 path_parentat fs/namei.c:2856 [inline]
 __filename_parentat+0x27f/0x6f0 fs/namei.c:2880
 filename_parentat fs/namei.c:2898 [inline]
 filename_create+0xd9/0x370 fs/namei.c:4931
 filename_symlinkat+0xf7/0x410 fs/namei.c:5662
 __do_sys_symlinkat fs/namei.c:5688 [inline]
 __se_sys_symlinkat+0x4e/0x2b0 fs/namei.c:5683
 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: 0033:0x7f253bd9be97
Code: 44 00 00 48 89 f2 31 c9 48 89 fe bf 9c ff ff ff e9 8e f5 ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 0a 01 00 00 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:00007ffe75c8c5d8 EFLAGS: 00000206 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f253bd9be97
RDX: 00007f253be33d22 RSI: 00000000ffffff9c RDI: 00007ffe75c8c670
RBP: 00007ffe75c8c61c R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000023f
R13: 00000000000927c0 R14: 000000000010a41d R15: 00007ffe75c8c670
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 44 24 20          	mov    %eax,0x20(%rsp)
   4:	e8 47 58 74 fd       	call   0xfd745850
   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 20 b2 28 8c 	mov    $0xffffffff8c28b220,%rsi
  1c:	48 c7 c2 a0 b7 28 8c 	mov    $0xffffffff8c28b7a0,%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