INFO: task syz-executor:3159 blocked for more than 432 seconds.
      Not tainted 6.12.0-rc6-syzkaller-g57f7c7dc78cd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:0     pid:3159  tgid:3159  ppid:1      flags:0x00000006
Call Trace:
[<ffffffff85fe99a2>] context_switch kernel/sched/core.c:5328 [inline]
[<ffffffff85fe99a2>] __schedule+0xd58/0x3848 kernel/sched/core.c:6690
[<ffffffff85fec556>] __schedule_loop kernel/sched/core.c:6767 [inline]
[<ffffffff85fec556>] schedule+0xc4/0x324 kernel/sched/core.c:6782
[<ffffffff85fff302>] schedule_timeout+0x1e2/0x296 kernel/time/timer.c:2591
[<ffffffff85fedf32>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff85fedf32>] __wait_for_common+0x1ca/0x4b6 kernel/sched/completion.c:116
[<ffffffff85fee238>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff85fee238>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:148
[<ffffffff802d7c1e>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:4630
[<ffffffff84d36472>] netdev_run_todo+0x294/0x105e net/core/dev.c:10786
[<ffffffff84d61c7a>] rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:152
[<ffffffff82f4a258>] tun_detach drivers/net/tun.c:704 [inline]
[<ffffffff82f4a258>] tun_chr_close+0xde/0x230 drivers/net/tun.c:3517
[<ffffffff80a2ce8c>] __fput+0x378/0x9e6 fs/file_table.c:431
[<ffffffff80a2d5a0>] ____fput+0x1c/0x26 fs/file_table.c:459
[<ffffffff8014f68c>] task_work_run+0x16a/0x25e kernel/task_work.c:239
[<ffffffff800d89f8>] exit_task_work include/linux/task_work.h:43 [inline]
[<ffffffff800d89f8>] do_exit+0xa4c/0x2986 kernel/exit.c:939
[<ffffffff800dae92>] do_group_exit+0xd4/0x26c kernel/exit.c:1088
[<ffffffff8010d612>] get_signal+0x1e98/0x23b0 kernel/signal.c:2917
[<ffffffff8000bb02>] arch_do_signal_or_restart+0x8d2/0x1188 arch/riscv/kernel/signal.c:437
[<ffffffff85fe0b20>] exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
[<ffffffff85fe0b20>] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
[<ffffffff85fe0b20>] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
[<ffffffff85fe0b20>] syscall_exit_to_user_mode+0x2a6/0x31e kernel/entry/common.c:218
[<ffffffff85fdfa42>] do_trap_ecall_u+0x86/0x216 arch/riscv/kernel/traps.c:345
[<ffffffff860029b6>] _new_vmalloc_restore_context_a0+0xc2/0xce

Showing all locks held in the system:
2 locks held by kworker/1:1/34:
1 lock held by khungtaskd/36:
 #0: ffffffff881cc080 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6716
1 lock held by syslogd/2970:
2 locks held by getty/3124:
 #0: ff6000001c8f10a0 (&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
4 locks held by kworker/1:3/3153:
1 lock held by syz-executor/3159:
 #0: ffffffff881dc600 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4562
5 locks held by kworker/u9:1/3162:
2 locks held by kworker/1:2/4542:
2 locks held by kworker/1:6/4553:
1 lock held by syz.1.165/4580:
 #0: ffffffff881dc600 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4562
1 lock held by syz-executor/4583:
 #0: ffffffff895ae468 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff895ae468 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e2/0xdbe net/core/rtnetlink.c:6672
2 locks held by kworker/u9:8/4584:
3 locks held by kworker/0:7/4590:
3 locks held by syz-executor/4591:
2 locks held by syz-executor/4654:
1 lock held by rm/4660:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: khungtaskd Not tainted 6.12.0-rc6-syzkaller-g57f7c7dc78cd #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80010a0c>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130
[<ffffffff85f822a0>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:136
[<ffffffff85fdd896>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff85fdd896>] dump_stack_lvl+0x122/0x196 lib/dump_stack.c:120
[<ffffffff85fdd926>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff85f45986>] nmi_cpu_backtrace+0x39c/0x39e lib/nmi_backtrace.c:113
[<ffffffff85f45c3e>] nmi_trigger_cpumask_backtrace+0x2b6/0x456 lib/nmi_backtrace.c:62
[<ffffffff8001996c>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:347
[<ffffffff80432008>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff80432008>] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
[<ffffffff80432008>] watchdog+0xcfa/0x1178 kernel/hung_task.c:379
[<ffffffff80154924>] kthread+0x28c/0x3a6 kernel/kthread.c:389
[<ffffffff86002ace>] 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: 4553 Comm: kworker/1:6 Not tainted 6.12.0-rc6-syzkaller-g57f7c7dc78cd #0
Hardware name: riscv-virtio,qemu (DT)
Workqueue: wg-crypt-wg1 wg_packet_tx_worker
epc : validate_xmit_vlan net/core/dev.c:3625 [inline]
epc : validate_xmit_skb+0x32/0xe10 net/core/dev.c:3662
 ra : validate_xmit_skb+0x32/0xe10 net/core/dev.c:3661
epc : ffffffff84d1765c ra : ffffffff84d1765c sp : ff200000000168c0
 gp : ffffffff899c0180 tp : ff6000001a951a40 t0 : ff6000001a952560
 t1 : ff6000001a952628 t2 : 00000000000002de s0 : ff20000000016940
 s1 : ff6000001de98640 a0 : 00000516401d4c69 a1 : 0000000000000000
 a2 : 0000000000f00000 a3 : ffffffff84d16d3c a4 : 0000000000000000
 a5 : ff6000001a951a40 a6 : 0000000000f00000 a7 : 000000004799a9c8
 s2 : ffffffff8646dfe8 s3 : ff60000018c98000 s4 : ff20000000016a70
 s5 : ff6000001dfde000 s6 : ff60000018c98140 s7 : 1fec000003193028
 s8 : 0000000000000000 s9 : ffffffff90d62aa0 s10: ff20000000016c00
 s11: ff6000001dfde000 t3 : 1fec00000352a4ab t4 : 0000000000000009
 t5 : ad2f07c13f95bef5 t6 : 1fec00000352a4c9
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff84d1765c>] validate_xmit_skb+0x32/0xe10 net/core/dev.c:3661
[<ffffffff84d1a230>] __dev_queue_xmit+0x7f4/0x48cc net/core/dev.c:4424
[<ffffffff8534b00a>] dev_queue_xmit include/linux/netdevice.h:3094 [inline]
[<ffffffff8534b00a>] neigh_hh_output include/net/neighbour.h:526 [inline]
[<ffffffff8534b00a>] neigh_output include/net/neighbour.h:540 [inline]
[<ffffffff8534b00a>] ip_finish_output2+0xe7e/0x2c48 net/ipv4/ip_output.c:236
[<ffffffff8534d14c>] __ip_finish_output net/ipv4/ip_output.c:314 [inline]
[<ffffffff8534d14c>] __ip_finish_output+0x378/0x60e net/ipv4/ip_output.c:296
[<ffffffff8534d41a>] ip_finish_output+0x38/0x32e net/ipv4/ip_output.c:324
[<ffffffff8534d89e>] NF_HOOK_COND include/linux/netfilter.h:303 [inline]
[<ffffffff8534d89e>] ip_output+0x18e/0x61a net/ipv4/ip_output.c:434
[<ffffffff8534e7a4>] dst_output include/net/dst.h:450 [inline]
[<ffffffff8534e7a4>] ip_local_out+0xac/0x1a8 net/ipv4/ip_output.c:130
[<ffffffff851d2330>] synproxy_send_tcp.isra.0+0x3de/0x5d2 net/netfilter/nf_synproxy_core.c:439
[<ffffffff851d42b0>] synproxy_send_client_synack+0x940/0xc9a net/netfilter/nf_synproxy_core.c:484
[<ffffffff852aa3f0>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline]
[<ffffffff852aa3f0>] nft_synproxy_do_eval+0x8ac/0xa52 net/netfilter/nft_synproxy.c:141
[<ffffffff852aa5f4>] nft_synproxy_eval+0x28/0x36 net/netfilter/nft_synproxy.c:247
[<ffffffff851e09c2>] expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
[<ffffffff851e09c2>] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:288
[<ffffffff8523a49c>] nft_do_chain_inet+0x180/0x316 net/netfilter/nft_chain_filter.c:161
[<ffffffff851158f4>] nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
[<ffffffff851158f4>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:626
[<ffffffff85333632>] nf_hook include/linux/netfilter.h:269 [inline]
[<ffffffff85333632>] NF_HOOK include/linux/netfilter.h:312 [inline]
[<ffffffff85333632>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff853320da>] dst_input include/net/dst.h:460 [inline]
[<ffffffff853320da>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:449
[<ffffffff85333986>] NF_HOOK include/linux/netfilter.h:314 [inline]
[<ffffffff85333986>] NF_HOOK include/linux/netfilter.h:308 [inline]
[<ffffffff85333986>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:569
[<ffffffff84d25ad0>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5670
[<ffffffff84d25d50>] __netif_receive_skb+0x2c/0x144 net/core/dev.c:5783
[<ffffffff84d26dd4>] process_backlog+0x4fc/0x1cbc net/core/dev.c:6115
[<ffffffff84d2b686>] __napi_poll.constprop.0+0xaa/0x4b8 net/core/dev.c:6779
[<ffffffff84d2c4a6>] napi_poll net/core/dev.c:6848 [inline]
[<ffffffff84d2c4a6>] net_rx_action+0xa12/0xf10 net/core/dev.c:6970
[<ffffffff800e0a66>] handle_softirqs+0x4a6/0x10de kernel/softirq.c:554
[<ffffffff86002ba8>] __do_softirq+0x12/0x1a kernel/softirq.c:588
[<ffffffff80006f74>] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:85
[<ffffffff86002b0a>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:355