INFO: task kworker/u8:1:13 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1    state:D stack:0     pid:13    tgid:13    ppid:2      task_flags:0x4208060 flags:0x00000000
Workqueue: netns cleanup_net
Call Trace:
[<ffffffff8632de30>] context_switch kernel/sched/core.c:5396 [inline]
[<ffffffff8632de30>] __schedule+0x1022/0x4094 kernel/sched/core.c:6785
[<ffffffff86330f66>] __schedule_loop kernel/sched/core.c:6863 [inline]
[<ffffffff86330f66>] schedule+0xc4/0x35e kernel/sched/core.c:6878
[<ffffffff863454fa>] schedule_timeout+0x1c6/0x2ae kernel/time/sleep_timeout.c:75
[<ffffffff86332aee>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff86332aee>] __wait_for_common+0x1d2/0x3e8 kernel/sched/completion.c:116
[<ffffffff86332d1e>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff86332d1e>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:148
[<ffffffff80375b84>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:3850
[<ffffffff8321d280>] wg_destruct+0x26c/0x3ca drivers/net/wireguard/device.c:261
[<ffffffff8512e552>] netdev_run_todo+0x652/0x10b4 net/core/dev.c:11405
[<ffffffff8515e36c>] rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:157
[<ffffffff851344de>] default_device_exit_batch+0x67c/0x8b0 net/core/dev.c:12645
[<ffffffff850c4a6e>] ops_exit_list net/core/net_namespace.c:206 [inline]
[<ffffffff850c4a6e>] ops_undo_list+0x3e8/0x9dc net/core/net_namespace.c:253
[<ffffffff850c969c>] cleanup_net+0x3e0/0x7ce net/core/net_namespace.c:686
[<ffffffff801bd390>] process_one_work+0x96a/0x1f32 kernel/workqueue.c:3238
[<ffffffff801c04a0>] process_scheduled_works kernel/workqueue.c:3321 [inline]
[<ffffffff801c04a0>] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3402
[<ffffffff801ddcbc>] kthread+0x39c/0x7d4 kernel/kthread.c:464
[<ffffffff8006977a>] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214
[<ffffffff8634b8fa>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327

Showing all locks held in the system:
5 locks held by kworker/u8:1/13:
 #0: ffffaf80126e2148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3213
 #1: ffff8f80000e7b70 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3213
 #2: ffffffff89855570 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xcc/0x7ce net/core/net_namespace.c:662
 #3: ffffaf80190154e8 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_destruct+0x150/0x3ca drivers/net/wireguard/device.c:249
 #4: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
2 locks held by ksoftirqd/1/24:
1 lock held by khungtaskd/39:
 #0: ffffffff883dc420 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766
1 lock held by syslogd/3003:
2 locks held by getty/3160:
 #0: ffffaf80730180a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ffff8f800008e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e4/0x12b6 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/3183:
3 locks held by kworker/u9:0/3280:
3 locks held by kworker/u9:1/4829:
2 locks held by kworker/1:0/5268:
1 lock held by syz-executor/5342:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
2 locks held by kworker/1:6/5385:
1 lock held by syz.1.531/5389:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
2 locks held by kworker/1:7/5399:
2 locks held by kworker/1:8/5465:
1 lock held by syz-executor/5543:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
2 locks held by kworker/1:9/5689:
2 locks held by kworker/1:11/6122:
4 locks held by kworker/1:12/6151:
2 locks held by kworker/u9:3/6278:
 #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3213
 #1: ffff8f8001dc7b70 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3213
3 locks held by kworker/0:3/6553:
1 lock held by modprobe/6564:
1 lock held by kworker/u9:0/6567:

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 39 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80078bbe>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000327a>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff8006103e>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff8006103e>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff800610d2>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff862e5a74>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff862e5d2c>] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62
[<ffffffff800863dc>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:350
[<ffffffff804edb80>] trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
[<ffffffff804edb80>] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
[<ffffffff804edb80>] watchdog+0xcf2/0x11de kernel/hung_task.c:470
[<ffffffff801ddcbc>] kthread+0x39c/0x7d4 kernel/kthread.c:464
[<ffffffff8006977a>] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214
[<ffffffff8634b8fa>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5399 Comm: kworker/1:7 Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: wg-crypt-wg0 wg_packet_tx_worker
epc : is_kmalloc_cache mm/slab.h:450 [inline]
epc : unpoison_slab_object mm/kasan/common.c:318 [inline]
epc : __kasan_slab_alloc+0x3c/0x82 mm/kasan/common.c:345
 ra : unpoison_slab_object mm/kasan/common.c:315 [inline]
 ra : __kasan_slab_alloc+0x3c/0x82 mm/kasan/common.c:345
epc : ffffffff80af2d7e ra : ffffffff80af2d7e sp : ffff8f8000016a50
 gp : ffffffff89c83ca0 tp : ffffaf8012bab480 t0 : fffff5ef08af6437
 t1 : 0000000000000001 t2 : fffffffff2f20000 s0 : ffff8f8000016a90
 s1 : ffffaf80457b2100 a0 : fffff5ef08af6420 a1 : 0000000000000000
 a2 : 0000000000000007 a3 : fffff5ef08af6437 a4 : 0000000000000000
 a5 : ffffffff86322574 a6 : ffffffff80a53b9a a7 : ffffffff85750f4a
 s2 : ffffaf807307ef00 s3 : 0000000000000820 s4 : ffffffff8513e10a
 s5 : 00000000000000b8 s6 : 00000000000000b8 s7 : ffffaf80457b2100
 s8 : ffffaf80457b2258 s9 : 0000000000000002 s10: ffffffff9103c3c0
 s11: 0000000000000007 t3 : 81987a7b00000000 t4 : 0000000000001fff
 t5 : 00000000000000c8 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff80af2d7e>] unpoison_slab_object mm/kasan/common.c:315 [inline]
[<ffffffff80af2d7e>] __kasan_slab_alloc+0x3c/0x82 mm/kasan/common.c:345
[<ffffffff80a53c52>] kasan_slab_alloc include/linux/kasan.h:250 [inline]
[<ffffffff80a53c52>] slab_post_alloc_hook mm/slub.c:4148 [inline]
[<ffffffff80a53c52>] slab_alloc_node mm/slub.c:4197 [inline]
[<ffffffff80a53c52>] kmem_cache_alloc_noprof+0x104/0x3d0 mm/slub.c:4204
[<ffffffff8513e10a>] dst_alloc+0x94/0x174 net/core/dst.c:89
[<ffffffff857356b0>] rt_dst_alloc+0x3a/0x340 net/ipv4/route.c:1642
[<ffffffff8574ec8a>] __mkroute_output net/ipv4/route.c:2643 [inline]
[<ffffffff8574ec8a>] ip_route_output_key_hash_rcu+0x822/0x29f8 net/ipv4/route.c:2864
[<ffffffff85750fb8>] ip_route_output_key_hash+0x158/0x31c net/ipv4/route.c:2694
[<ffffffff85751b78>] __ip_route_output_key include/net/route.h:169 [inline]
[<ffffffff85751b78>] ip_route_output_flow+0x2a/0x142 net/ipv4/route.c:2921
[<ffffffff859fa2ae>] ip_route_output_key include/net/route.h:179 [inline]
[<ffffffff859fa2ae>] ip_route_me_harder+0x52e/0x11a6 net/ipv4/netfilter.c:53
[<ffffffff855f6c10>] synproxy_send_tcp.isra.0+0x2be/0x5d2 net/netfilter/nf_synproxy_core.c:431
[<ffffffff855f8b5c>] synproxy_send_client_synack+0x6dc/0x8be net/netfilter/nf_synproxy_core.c:484
[<ffffffff856d2494>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline]
[<ffffffff856d2494>] nft_synproxy_do_eval+0x8ac/0xa52 net/netfilter/nft_synproxy.c:141
[<ffffffff856d2698>] nft_synproxy_eval+0x28/0x36 net/netfilter/nft_synproxy.c:247
[<ffffffff85603fc2>] expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
[<ffffffff85603fc2>] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:285
[<ffffffff85660180>] nft_do_chain_inet+0x180/0x316 net/netfilter/nft_chain_filter.c:161
[<ffffffff855393e0>] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
[<ffffffff855393e0>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff8575e242>] nf_hook include/linux/netfilter.h:272 [inline]
[<ffffffff8575e242>] NF_HOOK include/linux/netfilter.h:315 [inline]
[<ffffffff8575e242>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff8575c2f8>] dst_input include/net/dst.h:469 [inline]
[<ffffffff8575c2f8>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:447
[<ffffffff8575e596>] NF_HOOK include/linux/netfilter.h:317 [inline]
[<ffffffff8575e596>] NF_HOOK include/linux/netfilter.h:311 [inline]
[<ffffffff8575e596>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:567
[<ffffffff8511db78>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5977
[<ffffffff8511ddf8>] __netif_receive_skb+0x2c/0x144 net/core/dev.c:6090
[<ffffffff8511eff8>] process_backlog+0x4f6/0x1cb0 net/core/dev.c:6442
[<ffffffff85123992>] __napi_poll.constprop.0+0xaa/0x4ba net/core/dev.c:7414
[<ffffffff85124876>] napi_poll net/core/dev.c:7478 [inline]
[<ffffffff85124876>] net_rx_action+0xad4/0xefc net/core/dev.c:7605
[<ffffffff8015e7ae>] handle_softirqs+0x4b2/0x132e kernel/softirq.c:579
[<ffffffff8015f8fa>] __do_softirq kernel/softirq.c:613 [inline]
[<ffffffff8015f8fa>] invoke_softirq kernel/softirq.c:453 [inline]
[<ffffffff8015f8fa>] __irq_exit_rcu+0x18c/0x550 kernel/softirq.c:680
[<ffffffff80161300>] irq_exit_rcu+0x10/0xf8 kernel/softirq.c:696
[<ffffffff86322b04>] handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:388
[<ffffffff8634b942>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:360