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: 1 PID: 1054 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: 1 PID: 1054 Comm: kworker/u8:1 Not tainted 6.8.0-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: netns cleanup_net
Backtrace: 
[<81863324>] (dump_backtrace) from [<81863420>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:82622e44 r5:00000000 r4:81fc0df8
[<81863408>] (show_stack) from [<81880b84>] (__dump_stack lib/dump_stack.c:88 [inline])
[<81863408>] (show_stack) from [<81880b84>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:114)
[<81880b30>] (dump_stack_lvl) from [<81880bc4>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
 r5:00000000 r4:82858d18
[<81880bac>] (dump_stack) from [<81863ec8>] (panic+0x120/0x358 kernel/panic.c:348)
[<81863da8>] (panic) from [<8024388c>] (check_panic_on_warn kernel/panic.c:241 [inline])
[<81863da8>] (panic) from [<8024388c>] (print_tainted+0x0/0xa0 kernel/panic.c:236)
 r3:8260c584 r2:00000001 r1:81fa9b44 r0:81fb16ec
 r7:8089f874
[<80243818>] (check_panic_on_warn) from [<80243a80>] (__warn+0x7c/0x180 kernel/panic.c:694)
[<80243a04>] (__warn) from [<80243cfc>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:719)
 r8:00000009 r7:820101dc r6:e4a59dfc r5:834b4800 r4:00000000
[<80243b88>] (warn_slowpath_fmt) from [<8089f874>] (ref_tracker_dir_exit+0x224/0x22c lib/ref_tracker.c:179)
 r10:00000100 r9:60000113 r8:00000122 r7:84c066b4 r6:84c066a0 r5:84c066b4
 r4:84c066b4
[<8089f650>] (ref_tracker_dir_exit) from [<813894c0>] (net_free net/core/net_namespace.c:462 [inline])
[<8089f650>] (ref_tracker_dir_exit) from [<813894c0>] (net_free+0x5c/0x74 net/core/net_namespace.c:456)
 r10:ffffffd8 r9:84c03300 r8:827c0a80 r7:e4a59ea8 r6:e4a59e88 r5:e4a59e88
 r4:84c06600
[<81389464>] (net_free) from [<81389838>] (cleanup_net+0x360/0x438 net/core/net_namespace.c:658)
 r5:e4a59e88 r4:84c06600
[<813894d8>] (cleanup_net) from [<802662fc>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
 r10:82c21215 r9:834b4800 r8:00000200 r7:82c0e600 r6:82c21200 r5:827c09d8
 r4:83a4a700
[<80266144>] (process_one_work) from [<80267020>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
[<80266144>] (process_one_work) from [<80267020>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
 r10:834b4800 r9:83a4a72c r8:61c88647 r7:82c0e620 r6:82604d40 r5:82c0e600
 r4:83a4a700
[<80266e34>] (worker_thread) from [<8026fd30>] (kthread+0x104/0x134 kernel/kthread.c:388)
 r10:00000000 r9:df841e90 r8:83e04800 r7:83a4a700 r6:80266e34 r5:834b4800
 r4:83e04740
[<8026fc2c>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
Exception stack(0xe4a59fb0 to 0xe4a59ff8)
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 r5:8026fc2c r4:83e04740
Rebooting in 86400 seconds..