INFO: task syz.1.1476:20322 blocked for more than 430 seconds.
      Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1476      state:D stack:0     pid:20322 tgid:20322 ppid:18886  flags:0x00000006
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
[<ffffffff82f49534>] tun_detach drivers/net/tun.c:704 [inline]
[<ffffffff82f49534>] tun_chr_close+0xde/0x230 drivers/net/tun.c:3517
[<ffffffff80a2c758>] __fput+0x378/0x9e6 fs/file_table.c:431
[<ffffffff80a2ce6c>] ____fput+0x1c/0x26 fs/file_table.c:459
[<ffffffff8014fb7c>] task_work_run+0x16a/0x25e kernel/task_work.c:228
[<ffffffff800d8f4c>] exit_task_work include/linux/task_work.h:40 [inline]
[<ffffffff800d8f4c>] do_exit+0xa4c/0x2986 kernel/exit.c:939
[<ffffffff800db3e6>] do_group_exit+0xd4/0x26c kernel/exit.c:1088
[<ffffffff8010db36>] get_signal+0x1e98/0x23b0 kernel/signal.c:2917
[<ffffffff8000b324>] arch_do_signal_or_restart+0xf4/0x1190 arch/riscv/kernel/signal.c:437
[<ffffffff85fdafce>] exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
[<ffffffff85fdafce>] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
[<ffffffff85fdafce>] irqentry_exit_to_user_mode+0x288/0x300 kernel/entry/common.c:231
[<ffffffff85fdb154>] irqentry_exit+0x10e/0x17a kernel/entry/common.c:334
[<ffffffff85fd9cf4>] do_page_fault+0x3e/0x56 arch/riscv/kernel/traps.c:366
[<ffffffff85ffcac6>] _new_vmalloc_restore_context_a0+0xc2/0xce

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 syslogd/2993:
2 locks held by getty/3148:
 #0: ff6000001d4c00a0 (&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
3 locks held by sshd/3171:
2 locks held by kworker/1:6/10767:
3 locks held by kworker/1:1/16273:
5 locks held by kworker/1:0/17132:
2 locks held by kworker/0:1/18577:
2 locks held by kworker/1:2/18586:
2 locks held by kworker/1:3/18640:
4 locks held by kworker/0:6/18736:
 #0: ff60000031b6c548 ((wq_completion)wg-kex-wg1#4){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff20000002b47c90 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"((typeof(*((worker))) *)((worker)))); (typeof((typeof(*((worker))) *)((worker)))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1dae kernel/workqueue.c:3204
 #2: ff6000002ba31208 (&wg->static_identity.lock){++++}-{3:3}, at: wg_noise_handshake_consume_initiation+0x12c/0x904 drivers/net/wireguard/noise.c:598
 #3: ff6000002dece0f8 (&handshake->lock){++++}-{3:3}, at: wg_noise_handshake_consume_initiation+0x4b4/0x904 drivers/net/wireguard/noise.c:632
1 lock held by syz-executor/18886:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
2 locks held by kworker/1:5/20228:
2 locks held by kworker/1:7/20243:
2 locks held by kworker/1:8/20268:
1 lock held by syz.1.1476/20322:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
4 locks held by kworker/1:10/20345:
7 locks held by syz-executor/20351:
 #0: ff6000001d570420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001d570420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001d570420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001d570420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff6000003af1d888 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001ad1c008 (kn->active#4){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x258/0x460 fs/kernfs/file.c:326
 #3: ffffffff88c129e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xf0/0x48c drivers/net/netdevsim/bus.c:216
 #4: ff6000001e7880e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #4: ff6000001e7880e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ff6000001e7880e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x9c/0x572 drivers/base/dd.c:1293
 #5: ff6000001e78f250 (&devlink->lock_key#17){+.+.}-{3:3}, at: devl_lock+0x22/0x2c net/devlink/core.c:276
 #6: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
2 locks held by kworker/1:11/20442:
2 locks held by kworker/1:12/20512:
1 lock held by syz.0.1492/20614:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
4 locks held by syz-executor/20708:
 #0: ff6000001d570420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001d570420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001d570420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001d570420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff60000027965888 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001ad1c008 (kn->active#4){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x258/0x460 fs/kernfs/file.c:326
 #3: ffffffff88c129e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xf0/0x48c drivers/net/netdevsim/bus.c:216

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #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: 20243 Comm: kworker/1:7 Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_power_efficient neigh_periodic_work
epc : skb_headroom include/linux/skbuff.h:2821 [inline]
epc : neigh_hh_output include/net/neighbour.h:505 [inline]
epc : neigh_output include/net/neighbour.h:540 [inline]
epc : ip_finish_output2+0xcfa/0x2c48 net/ipv4/ip_output.c:236
 ra : neigh_hh_output include/net/neighbour.h:497 [inline]
 ra : neigh_output include/net/neighbour.h:540 [inline]
 ra : ip_finish_output2+0xcc6/0x2c48 net/ipv4/ip_output.c:236
epc : ffffffff85347bde ra : ffffffff85347baa sp : ff20000000016c80
 gp : ffffffff897bea80 tp : ff6000002d910000 t0 : ff6000002d910b20
 t1 : ff6000002d910be8 t2 : 0000000000000461 s0 : ff20000000016de0
 s1 : ff6000003e18adc0 a0 : 0000000000000005 a1 : 0000000000000000
 a2 : 0000000000f00000 a3 : ffffffff85347baa a4 : 0000000000000000
 a5 : 0000000000000000 a6 : 0000000000f00000 a7 : 1fec000005b2216d
 s2 : 0000000000000000 s3 : ff600000199ae800 s4 : 000000000000000e
 s5 : ffffffff85349ea4 s6 : 0000000000000000 s7 : 1fec000007c315d3
 s8 : 1fec000003335d3a s9 : 0000000000000000 s10: ffebffff03335d3a
 s11: ff6000003e18ae98 t3 : 1fec000005b22163 t4 : 0000000000000006
 t5 : d5ad9a5996520c4f t6 : 1fec000005b22181
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff85347bde>] skb_headroom include/linux/skbuff.h:2821 [inline]
[<ffffffff85347bde>] neigh_hh_output include/net/neighbour.h:505 [inline]
[<ffffffff85347bde>] neigh_output include/net/neighbour.h:540 [inline]
[<ffffffff85347bde>] ip_finish_output2+0xcfa/0x2c48 net/ipv4/ip_output.c:236
[<ffffffff85349ea4>] __ip_finish_output net/ipv4/ip_output.c:314 [inline]
[<ffffffff85349ea4>] __ip_finish_output+0x378/0x60e net/ipv4/ip_output.c:296
[<ffffffff8534a172>] ip_finish_output+0x38/0x32e net/ipv4/ip_output.c:324
[<ffffffff8534a5f6>] NF_HOOK_COND include/linux/netfilter.h:303 [inline]
[<ffffffff8534a5f6>] ip_output+0x18e/0x61a net/ipv4/ip_output.c:434
[<ffffffff8534b4fc>] dst_output include/net/dst.h:450 [inline]
[<ffffffff8534b4fc>] ip_local_out+0xac/0x1a8 net/ipv4/ip_output.c:130
[<ffffffff851cf130>] synproxy_send_tcp.isra.0+0x3de/0x5d2 net/netfilter/nf_synproxy_core.c:439
[<ffffffff851d10b0>] synproxy_send_client_synack+0x940/0xc9a net/netfilter/nf_synproxy_core.c:484
[<ffffffff852a716c>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline]
[<ffffffff852a716c>] nft_synproxy_do_eval+0x8ac/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
[<ffffffff85ffccb8>] __do_softirq+0x12/0x1a kernel/softirq.c:588
[<ffffffff80006f74>] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:85
[<ffffffff85ffcc1a>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:355