ref_tracker: reference already released.
ref_tracker: freed in:
------------[ cut here ]------------
pool index 57087 out of bounds (1086) for stack id 33ccdf00
WARNING: CPU: 1 PID: 5917 at lib/stackdepot.c:451 depot_fetch_stack+0x95/0xc0 lib/stackdepot.c:451
Modules linked in:
CPU: 1 UID: 0 PID: 5917 Comm: kworker/u8:8 Not tainted 6.15.0-syzkaller-02443-g015a99fa7665 #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+0x95/0xc0 lib/stackdepot.c:451
Code: c7 d8 b9 fa 8e e8 5b 64 6c 06 83 f8 01 75 b9 90 0f 0b 90 eb b3 90 48 c7 c7 f8 14 b0 8d 89 e9 44 89 ea 89 de e8 dc 36 74 fc 90 <0f> 0b 90 90 31 c0 eb bc 90 0f 0b 90 31 c0 eb b4 90 0f 0b 90 31 c0
RSP: 0018:ffffc9000435f5b0 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 000000000000deff RCX: ffffffff817aa8e8
RDX: ffff888031da5a00 RSI: ffffffff817aa8f5 RDI: 0000000000000001
RBP: 0000000033ccdf00 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001e60
R13: 000000000000043e R14: 0000000033ccdf00 R15: ffff888033ab5018
FS:  0000000000000000(0000) GS:ffff888124aaa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdeb67d4f98 CR3: 0000000029674000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 stack_depot_fetch+0x28/0x60 lib/stackdepot.c:718
 stack_depot_print+0x1f/0x60 lib/stackdepot.c:756
 ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
 netdev_tracker_free include/linux/netdevice.h:4351 [inline]
 netdev_put include/linux/netdevice.h:4368 [inline]
 netdev_put include/linux/netdevice.h:4364 [inline]
 in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
 in_dev_put include/linux/inetdevice.h:290 [inline]
 inetdev_destroy net/ipv4/devinet.c:338 [inline]
 inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
 notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2176
 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]
 call_netdevice_notifiers net/core/dev.c:2228 [inline]
 unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:11972
 unregister_netdevice_many net/core/dev.c:12036 [inline]
 default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12530
 ops_exit_list+0x12b/0x180 net/core/net_namespace.c:177
 cleanup_net+0x5c1/0xb30 net/core/net_namespace.c:654
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>