ref_tracker: reference already released.
ref_tracker: freed in:
------------[ cut here ]------------
pool index 24767 out of bounds (1592) for stack id 285860c0
WARNING: CPU: 0 PID: 16860 at lib/stackdepot.c:452 depot_fetch_stack+0x86/0xc0 lib/stackdepot.c:451
Modules linked in:
CPU: 0 UID: 0 PID: 16860 Comm: kworker/u8:17 Not tainted 6.15.0-rc7-syzkaller-00112-geccf6f2f6ab9 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
RIP: 0010:depot_fetch_stack+0x86/0xc0 lib/stackdepot.c:451
Code: 83 7c 18 1c 00 74 39 48 01 d8 eb 24 90 0f 0b 90 44 39 f5 72 ca 90 48 c7 c7 a2 1b 79 8d 89 ee 44 89 f2 89 d9 e8 2b 7f 96 fc 90 <0f> 0b 90 90 31 c0 5b 41 5e 5d e9 c6 71 22 fc cc 90 0f 0b 90 eb ee
RSP: 0018:ffffc90000007a18 EFLAGS: 00010046
RAX: 4ba22efe08238600 RBX: 00000000285860c0 RCX: ffff888026f11e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 00000000000060bf R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba984 R12: 1ffff1100e57aa83
R13: dffffc0000000000 R14: 0000000000000638 R15: ffff888072bd5418
FS:  0000000000000000(0000) GS:ffff8881260c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30f13ff8 CR3: 00000000497a2000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 stack_depot_fetch lib/stackdepot.c:718 [inline]
 stack_depot_print+0x16/0x50 lib/stackdepot.c:756
 ref_tracker_free+0x5e4/0x7d0 lib/ref_tracker.c:252
 netdev_tracker_free include/linux/netdevice.h:4351 [inline]
 netdev_put include/linux/netdevice.h:4368 [inline]
 in_dev_finish_destroy+0x9b/0x190 net/ipv4/devinet.c:258
 in_dev_put include/linux/inetdevice.h:290 [inline]
 inet_rcu_free_ifa+0x72/0xb0 net/ipv4/devinet.c:228
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xca8/0x1710 kernel/rcu/tree.c:2824
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7090
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 5b 37 39 f6 e8 f6 b6 6f f6 fb bf 01 00 00 00 <e8> 4b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc90019f4f500 EFLAGS: 00000286
RAX: 4ba22efe08238600 RBX: 0000000000000000 RCX: 4ba22efe08238600
RDX: 0000000000000006 RSI: ffffffff8d74e2cc RDI: 0000000000000001
RBP: ffffc90019f4f5b0 R08: ffffffff8f7f3577 R09: 1ffffffff1efe6ae
R10: dffffc0000000000 R11: fffffbfff1efe6af R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920033e9ea0
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lockdep_unregister_key+0x2ba/0x310 kernel/locking/lockdep.c:6613
Code: 00 65 48 8b 05 67 7b d7 10 48 3b 44 24 10 0f 84 30 fe ff ff e8 97 31 b8 09 e8 c2 32 b8 09 41 f7 c7 00 02 00 00 74 be fb 84 db <75> bd eb ce 90 0f 0b 90 31 db eb 89 90 0f 0b 90 e9 36 ff ff ff 48
RSP: 0018:ffffc90019f4f678 EFLAGS: 00000246
RAX: 4ba22efe08238600 RBX: 0000000000000000 RCX: 4ba22efe08238600
RDX: ffffffff93397708 RSI: ffffffff8d7617c4 RDI: ffffffff8bc1f640
RBP: ffff888027228a99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff81ab2c08 R12: 0000000000000000
R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000216
 __qdisc_destroy+0x166/0x3f0 net/sched/sch_generic.c:1080
 qdisc_put net/sched/sch_generic.c:1106 [inline]
 dev_shutdown+0x34c/0x440 net/sched/sch_generic.c:1494
 unregister_netdevice_many_notify+0xea7/0x2330 net/core/dev.c:11960
 unregister_netdevice_many net/core/dev.c:12036 [inline]
 default_device_exit_batch+0x819/0x890 net/core/dev.c:12530
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x7ac/0xbd0 net/core/net_namespace.c:654
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4e/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	24 20                	and    $0x20,%al
   2:	f6 44 24 21 02       	testb  $0x2,0x21(%rsp)
   7:	74 0c                	je     0x15
   9:	90                   	nop
   a:	0f 0b                	ud2
   c:	48 f7 03 08 00 00 00 	testq  $0x8,(%rbx)
  13:	74 64                	je     0x79
  15:	bf 01 00 00 00       	mov    $0x1,%edi
  1a:	e8 5b 37 39 f6       	call   0xf639377a
  1f:	e8 f6 b6 6f f6       	call   0xf66fb71a
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 4b ab ff ff       	call   0xffffab7a <-- trapping instruction
  2f:	48 c7 44 24 40 00 00 	movq   $0x0,0x40(%rsp)
  36:	00 00
  38:	9c                   	pushf
  39:	8f 44 24 40          	pop    0x40(%rsp)
  3d:	8b                   	.byte 0x8b
  3e:	44                   	rex.R
  3f:	24                   	.byte 0x24