INFO: task kworker/u8:3:3495 blocked for more than 430 seconds.
      Not tainted 6.12.0-rc1-syzkaller-00012-g5f153a692bac #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:3    state:D stack:0     pid:3495  tgid:3495  ppid:2      flags:0x00000000
Workqueue: netns cleanup_net
Call Trace:
[<ffffffff85fe3a74>] context_switch kernel/sched/core.c:5315 [inline]
[<ffffffff85fe3a74>] __schedule+0xd5a/0x3886 kernel/sched/core.c:6675
[<ffffffff85fe6664>] __schedule_loop kernel/sched/core.c:6752 [inline]
[<ffffffff85fe6664>] schedule+0xc4/0x324 kernel/sched/core.c:6767
[<ffffffff85ff9412>] schedule_timeout+0x1e2/0x296 kernel/time/timer.c:2591
[<ffffffff85fe8042>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff85fe8042>] __wait_for_common+0x1ca/0x4b6 kernel/sched/completion.c:116
[<ffffffff85fe8348>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff85fe8348>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:148
[<ffffffff802d83b6>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:4629
[<ffffffff84d323f6>] netdev_run_todo+0x294/0x105e net/core/dev.c:10778
[<ffffffff84d5e85e>] rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:152
[<ffffffff83317408>] nsim_destroy+0x178/0x5fe drivers/net/netdevsim/netdev.c:785
[<ffffffff83318646>] __nsim_dev_port_del+0x168/0x236 drivers/net/netdevsim/dev.c:1425
[<ffffffff8331c69c>] nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1437 [inline]
[<ffffffff8331c69c>] nsim_dev_reload_destroy+0x11c/0x452 drivers/net/netdevsim/dev.c:1658
[<ffffffff8331ca44>] nsim_dev_reload_down+0x72/0xec drivers/net/netdevsim/dev.c:965
[<ffffffff859ba936>] devlink_reload+0x162/0x6a2 net/devlink/dev.c:461
[<ffffffff859b44de>] devlink_pernet_pre_exit+0x1a0/0x29a net/devlink/core.c:509
[<ffffffff84cd88c6>] ops_pre_exit_list net/core/net_namespace.c:163 [inline]
[<ffffffff84cd88c6>] cleanup_net+0x444/0x984 net/core/net_namespace.c:606
[<ffffffff80135b72>] process_one_work+0x956/0x1dae kernel/workqueue.c:3229
[<ffffffff80137588>] process_scheduled_works kernel/workqueue.c:3310 [inline]
[<ffffffff80137588>] worker_thread+0x5be/0xdc6 kernel/workqueue.c:3391
[<ffffffff80154e14>] kthread+0x28c/0x3a6 kernel/kthread.c:389
[<ffffffff85ffcbde>] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326

Showing all locks held in the system:
1 lock held by khungtaskd/36:
 #0: ffffffff87fcc100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6716
1 lock held by klogd/2971:
2 locks held by getty/3140:
 #0: ff6000001b5190a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ff2000000008b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211
2 locks held by syz-executor/3168:
6 locks held by kworker/u8:3/3495:
 #0: ff60000011e81948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff2000000bf17c90 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x870/0x1dae kernel/workqueue.c:3204
 #2: ffffffff89397670 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xda/0x984 net/core/net_namespace.c:580
 #3: ff60000011b890e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #3: ff60000011b890e8 (&dev->mutex){....}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
 #3: ff60000011b890e8 (&dev->mutex){....}-{3:3}, at: devlink_pernet_pre_exit+0x138/0x29a net/devlink/core.c:506
 #4: ff6000002be5e250 (&devlink->lock_key#4){+.+.}-{3:3}, at: devl_lock net/devlink/core.c:276 [inline]
 #4: ff6000002be5e250 (&devlink->lock_key#4){+.+.}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
 #4: ff6000002be5e250 (&devlink->lock_key#4){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x144/0x29a net/devlink/core.c:506
 #5: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
2 locks held by kworker/1:1/3787:
2 locks held by kworker/1:5/3864:
2 locks held by kworker/1:6/4156:
2 locks held by kworker/1:3/5196:
3 locks held by kworker/1:4/5283:
2 locks held by kworker/1:8/5292:
2 locks held by kworker/1:9/5300:
2 locks held by kworker/1:11/5358:
2 locks held by kworker/u9:1/5465:
 #0: ff60000011071148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff20000004e07c90 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1dae kernel/workqueue.c:3204
2 locks held by kworker/1:12/5470:
2 locks held by kworker/1:13/5654:
3 locks held by kworker/0:5/6045:
2 locks held by kworker/1:17/6070:
2 locks held by kworker/1:18/6082:
1 lock held by syz-executor/6085:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
2 locks held by kworker/1:19/6176:
3 locks held by kworker/1:20/6237:
2 locks held by kworker/1:24/6453:
1 lock held by syz.5.212/6481:
1 lock held by syz-executor/6495:
2 locks held by kworker/1:25/6976:
4 locks held by modprobe/7026:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00012-g5f153a692bac #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80010a14>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130
[<ffffffff85f7c3cc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:136
[<ffffffff85fd797a>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff85fd797a>] dump_stack_lvl+0x122/0x196 lib/dump_stack.c:120
[<ffffffff85fd7a0a>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff85f3faae>] nmi_cpu_backtrace+0x39c/0x39e lib/nmi_backtrace.c:113
[<ffffffff85f3fd66>] nmi_trigger_cpumask_backtrace+0x2b6/0x456 lib/nmi_backtrace.c:62
[<ffffffff80019974>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:347
[<ffffffff80432c3c>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff80432c3c>] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
[<ffffffff80432c3c>] watchdog+0xcfa/0x1178 kernel/hung_task.c:379
[<ffffffff80154e14>] kthread+0x28c/0x3a6 kernel/kthread.c:389
[<ffffffff85ffcbde>] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.12.0-rc1-syzkaller-00012-g5f153a692bac #0
Hardware name: riscv-virtio,qemu (DT)
epc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
epc : _raw_spin_unlock_irqrestore+0x36/0xd6 kernel/locking/spinlock.c:194
 ra : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
 ra : _raw_spin_unlock_irqrestore+0x86/0xd6 kernel/locking/spinlock.c:194
epc : ffffffff85ffb7aa ra : ffffffff85ffb7fa sp : ff200000001a6d40
 gp : ffffffff897bea80 tp : ff60000012aa0000 t0 : ff60000012aa0b20
 t1 : fffffffef21560e6 t2 : 0000000000000001 s0 : ff200000001a6d60
 s1 : 0000000000000002 a0 : 0000000000000001 a1 : ffffffff8643e620
 a2 : 0000000000000003 a3 : 0000000000000101 a4 : 0000000000000001
 a5 : 0000000000000000 a6 : 0000000000f00000 a7 : ffffffff90ab0733
 s2 : ffffffff90ab0730 s3 : dfffffff00000000 s4 : 0000000000000001
 s5 : 0000000000000001 s6 : ff60000036b6e350 s7 : 1fe4000000034db0
 s8 : 0000000000000000 s9 : ffffffff90ab0730 s10: 0000000200000022
 s11: ff6000002e135914 t3 : 1fec000002554163 t4 : fffffffef21560e6
 t5 : fffffffef21560e7 t6 : 1fec000002554172
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff85ffb7aa>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff85ffb7aa>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
[<ffffffff85ffb7aa>] _raw_spin_unlock_irqrestore+0x36/0xd6 kernel/locking/spinlock.c:194
[<ffffffff814ab592>] debug_object_active_state+0x274/0x2c4 lib/debugobjects.c:945
[<ffffffff802e1f2c>] debug_rcu_head_queue kernel/rcu/rcu.h:225 [inline]
[<ffffffff802e1f2c>] __call_rcu_common.constprop.0+0x54/0x934 kernel/rcu/tree.c:3071
[<ffffffff802e282c>] call_rcu+0xc/0x14 kernel/rcu/tree.c:3190
[<ffffffff84d3d66c>] call_rcu_hurry include/linux/rcupdate.h:115 [inline]
[<ffffffff84d3d66c>] dst_release net/core/dst.c:165 [inline]
[<ffffffff84d3d66c>] dst_release+0x29a/0x364 net/core/dst.c:162
[<ffffffff84ca1d80>] refdst_drop include/net/dst.h:263 [inline]
[<ffffffff84ca1d80>] skb_dst_drop include/net/dst.h:275 [inline]
[<ffffffff84ca1d80>] skb_release_head_state+0x25a/0x2b6 net/core/skbuff.c:1174
[<ffffffff84cb03f2>] skb_release_all net/core/skbuff.c:1188 [inline]
[<ffffffff84cb03f2>] __kfree_skb net/core/skbuff.c:1204 [inline]
[<ffffffff84cb03f2>] consume_skb net/core/skbuff.c:1436 [inline]
[<ffffffff84cb03f2>] consume_skb+0x9e/0xfa net/core/skbuff.c:1430
[<ffffffff852a7176>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:60 [inline]
[<ffffffff852a7176>] nft_synproxy_do_eval+0x8b6/0xa52 net/netfilter/nft_synproxy.c:141
[<ffffffff852a7370>] nft_synproxy_eval+0x28/0x36 net/netfilter/nft_synproxy.c:247
[<ffffffff851dd7c2>] expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
[<ffffffff851dd7c2>] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:288
[<ffffffff8523729c>] nft_do_chain_inet+0x180/0x316 net/netfilter/nft_chain_filter.c:161
[<ffffffff85112730>] nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
[<ffffffff85112730>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:626
[<ffffffff8533038a>] nf_hook include/linux/netfilter.h:269 [inline]
[<ffffffff8533038a>] NF_HOOK include/linux/netfilter.h:312 [inline]
[<ffffffff8533038a>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff8532ee32>] dst_input include/net/dst.h:460 [inline]
[<ffffffff8532ee32>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:449
[<ffffffff853306de>] NF_HOOK include/linux/netfilter.h:314 [inline]
[<ffffffff853306de>] NF_HOOK include/linux/netfilter.h:308 [inline]
[<ffffffff853306de>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:569
[<ffffffff84d21a54>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5662
[<ffffffff84d21cd4>] __netif_receive_skb+0x2c/0x144 net/core/dev.c:5775
[<ffffffff84d22d58>] process_backlog+0x4fc/0x1cbc net/core/dev.c:6107
[<ffffffff84d2760a>] __napi_poll.constprop.0+0xaa/0x4b8 net/core/dev.c:6771
[<ffffffff84d2842a>] napi_poll net/core/dev.c:6840 [inline]
[<ffffffff84d2842a>] net_rx_action+0xa12/0xf10 net/core/dev.c:6962
[<ffffffff800e0fba>] handle_softirqs+0x4a6/0x10de kernel/softirq.c:554
[<ffffffff800e1cc0>] run_ksoftirqd kernel/softirq.c:927 [inline]
[<ffffffff800e1cc0>] run_ksoftirqd+0xce/0x144 kernel/softirq.c:919
[<ffffffff8016af16>] smpboot_thread_fn+0x654/0xb98 kernel/smpboot.c:164
[<ffffffff80154e14>] kthread+0x28c/0x3a6 kernel/kthread.c:389
[<ffffffff85ffcbde>] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326