unshare_nsproxy_namespaces+0x70/0x8c kernel/nsproxy.c:228
     ksys_unshare+0x180/0x358 kernel/fork.c:3322
     __do_sys_unshare kernel/fork.c:3393 [inline]
     sys_unshare+0x10/0x14 kernel/fork.c:3391
     ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2852 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x224/0x22c lib/ref_tracker.c:179
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 PID: 2852 Comm: kworker/u8:2 Not tainted 6.8.0-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: netns cleanup_net
Backtrace: 
[<81873764>] (dump_backtrace) from [<81873860>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:82622e44 r5:00000000 r4:81fc2e3c
[<81873848>] (show_stack) from [<81891004>] (__dump_stack lib/dump_stack.c:88 [inline])
[<81873848>] (show_stack) from [<81891004>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:114)
[<81890fb0>] (dump_stack_lvl) from [<81891044>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
 r5:00000000 r4:82857d18
[<8189102c>] (dump_stack) from [<81874308>] (panic+0x120/0x358 kernel/panic.c:348)
[<818741e8>] (panic) from [<802438cc>] (check_panic_on_warn kernel/panic.c:241 [inline])
[<818741e8>] (panic) from [<802438cc>] (print_tainted+0x0/0xa0 kernel/panic.c:236)
 r3:8260c584 r2:00000001 r1:81fabac4 r0:81fb366c
 r7:808a3994
[<80243858>] (check_panic_on_warn) from [<80243ac0>] (__warn+0x7c/0x180 kernel/panic.c:694)
[<80243a44>] (__warn) from [<80243d3c>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:719)
 r8:00000009 r7:82012320 r6:ec509dfc r5:83740c00 r4:00000000
[<80243bc8>] (warn_slowpath_fmt) from [<808a3994>] (ref_tracker_dir_exit+0x224/0x22c lib/ref_tracker.c:179)
 r10:00000100 r9:60000013 r8:00000122 r7:844c00b4 r6:844c00a0 r5:844c00b4
 r4:844c00b4
[<808a3770>] (ref_tracker_dir_exit) from [<81393db8>] (net_free net/core/net_namespace.c:462 [inline])
[<808a3770>] (ref_tracker_dir_exit) from [<81393db8>] (net_free+0x5c/0x74 net/core/net_namespace.c:456)
 r10:ffffffd8 r9:844c8000 r8:827c0800 r7:ec509ea8 r6:ec509e88 r5:ec509e88
 r4:844c0000
[<81393d5c>] (net_free) from [<81394130>] (cleanup_net+0x360/0x438 net/core/net_namespace.c:658)
 r5:ec509e88 r4:844c0000
[<81393dd0>] (cleanup_net) from [<802665bc>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
 r10:82c19215 r9:83740c00 r8:00000200 r7:82c0e600 r6:82c19200 r5:827c0758
 r4:83fd9700
[<80266404>] (process_one_work) from [<802672e0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
[<80266404>] (process_one_work) from [<802672e0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
 r10:83740c00 r9:83fd972c r8:61c88647 r7:82c0e620 r6:82604d40 r5:82c0e600
 r4:83fd9700
[<802670f4>] (worker_thread) from [<8026fff0>] (kthread+0x104/0x134 kernel/kthread.c:388)
 r10:00000000 r9:e4af1e90 r8:84363c80 r7:83fd9700 r6:802670f4 r5:83740c00
 r4:84363c00
[<8026feec>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
Exception stack(0xec509fb0 to 0xec509ff8)
9fa0:                                     00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026feec r4:84363c00
Rebooting in 86400 seconds..