INFO: task syz.0.85:5050 blocked for more than 430 seconds.
      Not tainted 6.12.0-rc1-syzkaller-00002-gcfb10de18538 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.85        state:D stack:0     pid:5050  tgid:5049  ppid:4555   flags:0x00000002
Call Trace:
[<ffffffff85fe3a64>] context_switch kernel/sched/core.c:5315 [inline]
[<ffffffff85fe3a64>] __schedule+0xd5a/0x3886 kernel/sched/core.c:6675
[<ffffffff85fe6654>] __schedule_loop kernel/sched/core.c:6752 [inline]
[<ffffffff85fe6654>] schedule+0xc4/0x324 kernel/sched/core.c:6767
[<ffffffff85fe6f9c>] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6824
[<ffffffff85fea818>] __mutex_lock_common kernel/locking/mutex.c:684 [inline]
[<ffffffff85fea818>] __mutex_lock+0x86a/0x1022 kernel/locking/mutex.c:752
[<ffffffff85feafe4>] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:804
[<ffffffff802d8120>] rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
[<ffffffff84d323e6>] netdev_run_todo+0x294/0x105e net/core/dev.c:10778
[<ffffffff84d5e84e>] rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:152
[<ffffffff82f49524>] tun_detach drivers/net/tun.c:704 [inline]
[<ffffffff82f49524>] tun_chr_close+0xde/0x230 drivers/net/tun.c:3517
[<ffffffff80a2c748>] __fput+0x378/0x9e6 fs/file_table.c:431
[<ffffffff80a2ce5c>] ____fput+0x1c/0x26 fs/file_table.c:459
[<ffffffff8014fb6c>] task_work_run+0x16a/0x25e kernel/task_work.c:228
[<ffffffff800d8f3c>] exit_task_work include/linux/task_work.h:40 [inline]
[<ffffffff800d8f3c>] do_exit+0xa4c/0x2986 kernel/exit.c:939
[<ffffffff800db3d6>] do_group_exit+0xd4/0x26c kernel/exit.c:1088
[<ffffffff8010db26>] get_signal+0x1e98/0x23b0 kernel/signal.c:2917
[<ffffffff8000bb06>] arch_do_signal_or_restart+0x8d6/0x1190 arch/riscv/kernel/signal.c:437
[<ffffffff85fdabf4>] exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
[<ffffffff85fdabf4>] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
[<ffffffff85fdabf4>] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
[<ffffffff85fdabf4>] syscall_exit_to_user_mode+0x2a6/0x31e kernel/entry/common.c:218
[<ffffffff85fd9b16>] do_trap_ecall_u+0x86/0x216 arch/riscv/kernel/traps.c:345
[<ffffffff85ffcab6>] _new_vmalloc_restore_context_a0+0xc2/0xce

Showing all locks held in the system:
4 locks held by kworker/u8:1/12:
 #0: ff60000011e81948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff200000000d7c90 (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: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
2 locks held by kworker/1:0/25:
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
2 locks held by getty/3148:
 #0: ff6000001b8a90a0 (&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/3177:
2 locks held by kworker/1:2/3186:
2 locks held by kworker/1:3/3818:
2 locks held by kworker/1:4/3875:
2 locks held by kworker/1:6/5025:
1 lock held by syz.1.81/5035:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
1 lock held by syz.0.85/5050:
 #0: ffffffff87fdc6c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:4561
7 locks held by syz-executor/5055:
 #0: ff6000001bce6420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001bce6420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001bce6420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001bce6420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff6000003520d488 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001aea81e8 (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: ff6000001c1290e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
 #4: ff6000001c1290e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ff6000001c1290e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x9c/0x572 drivers/base/dd.c:1293
 #5: ff6000001c128250 (&devlink->lock_key){+.+.}-{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
4 locks held by syz-executor/5059:
 #0: ff6000001bce6420 (sb_writers#7){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1716 [inline]
 #0: ff6000001bce6420 (sb_writers#7){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1852 [inline]
 #0: ff6000001bce6420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #0: ff6000001bce6420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x728/0x9b4 fs/read_write.c:679
 #1: ff6000002e8c9888 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x23a/0x460 fs/kernfs/file.c:325
 #2: ff6000001aea81e8 (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
3 locks held by kworker/1:9/5084:
2 locks held by kworker/1:10/5117:
2 locks held by kworker/1:11/5203:
2 locks held by kworker/1:12/5488:
1 lock held by kworker/1:13/5666:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00002-gcfb10de18538 #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80010a14>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130
[<ffffffff85f7c3bc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:136
[<ffffffff85fd796a>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff85fd796a>] dump_stack_lvl+0x122/0x196 lib/dump_stack.c:120
[<ffffffff85fd79fa>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff85f3fa9e>] nmi_cpu_backtrace+0x39c/0x39e lib/nmi_backtrace.c:113
[<ffffffff85f3fd56>] nmi_trigger_cpumask_backtrace+0x2b6/0x456 lib/nmi_backtrace.c:62
[<ffffffff80019964>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:347
[<ffffffff80432c2c>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff80432c2c>] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
[<ffffffff80432c2c>] watchdog+0xcfa/0x1178 kernel/hung_task.c:379
[<ffffffff80154e04>] kthread+0x28c/0x3a6 kernel/kthread.c:389
[<ffffffff85ffcbce>] 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: 3875 Comm: kworker/1:4 Not tainted 6.12.0-rc1-syzkaller-00002-gcfb10de18538 #0
Hardware name: riscv-virtio,qemu (DT)
Workqueue: wg-crypt-wg1 wg_packet_tx_worker
epc : ether_addr_equal include/linux/etherdevice.h:363 [inline]
epc : ether_addr_equal_64bits include/linux/etherdevice.h:392 [inline]
epc : eth_skb_pkt_type include/linux/etherdevice.h:627 [inline]
epc : eth_type_trans+0x29e/0x88e net/ethernet/eth.c:165
 ra : skb_mac_header include/linux/skbuff.h:3025 [inline]
 ra : eth_hdr include/linux/if_ether.h:24 [inline]
 ra : eth_skb_pkt_type include/linux/etherdevice.h:625 [inline]
 ra : eth_type_trans+0x1ee/0x88e net/ethernet/eth.c:165
epc : ffffffff84ed61b0 ra : ffffffff84ed6100 sp : ff20000000016720
 gp : ffffffff897bea80 tp : ff600000185f4ec0 t0 : ff600000185f59e0
 t1 : ff600000185f5aa8 t2 : 00000000000002df s0 : ff20000000016830
 s1 : ff6000003595dc80 a0 : ff6000002be210f4 a1 : 000000000000ffff
 a2 : 0000000000f00000 a3 : 0000000000000000 a4 : 0000000000000000
 a5 : 0000000000000001 a6 : 0000000000f00000 a7 : 000000001f3909af
 s2 : ff6000002be210f2 s3 : ff600000196f2000 s4 : ff6000002be210f2
 s5 : ff200000000167c0 s6 : 000000000000aaaa s7 : 000000000000ffff
 s8 : 1fe4000000002cec s9 : ff6000002b0bff28 s10: 1fec000006b2bb9e
 s11: 1fec000006b2bbab t3 : 1fec0000030beb3b t4 : 000000000000000c
 t5 : 6ffdc903a73a1df4 t6 : 1fec0000030beb59
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff84ed61b0>] ether_addr_equal include/linux/etherdevice.h:363 [inline]
[<ffffffff84ed61b0>] ether_addr_equal_64bits include/linux/etherdevice.h:392 [inline]
[<ffffffff84ed61b0>] eth_skb_pkt_type include/linux/etherdevice.h:627 [inline]
[<ffffffff84ed61b0>] eth_type_trans+0x29e/0x88e net/ethernet/eth.c:165
[<ffffffff82ed678c>] loopback_xmit+0x1ea/0x6be drivers/net/loopback.c:86
[<ffffffff84d14e90>] __netdev_start_xmit include/linux/netdevice.h:4916 [inline]
[<ffffffff84d14e90>] netdev_start_xmit include/linux/netdevice.h:4925 [inline]
[<ffffffff84d14e90>] xmit_one net/core/dev.c:3588 [inline]
[<ffffffff84d14e90>] dev_hard_start_xmit+0x226/0x978 net/core/dev.c:3604
[<ffffffff84d1625c>] __dev_queue_xmit+0x91c/0x493c net/core/dev.c:4424
[<ffffffff85347d52>] dev_queue_xmit include/linux/netdevice.h:3094 [inline]
[<ffffffff85347d52>] neigh_hh_output include/net/neighbour.h:526 [inline]
[<ffffffff85347d52>] neigh_output include/net/neighbour.h:540 [inline]
[<ffffffff85347d52>] ip_finish_output2+0xe7e/0x2c48 net/ipv4/ip_output.c:236
[<ffffffff85349e94>] __ip_finish_output net/ipv4/ip_output.c:314 [inline]
[<ffffffff85349e94>] __ip_finish_output+0x378/0x60e net/ipv4/ip_output.c:296
[<ffffffff8534a162>] ip_finish_output+0x38/0x32e net/ipv4/ip_output.c:324
[<ffffffff8534a5e6>] NF_HOOK_COND include/linux/netfilter.h:303 [inline]
[<ffffffff8534a5e6>] ip_output+0x18e/0x61a net/ipv4/ip_output.c:434
[<ffffffff8534b4ec>] dst_output include/net/dst.h:450 [inline]
[<ffffffff8534b4ec>] ip_local_out+0xac/0x1a8 net/ipv4/ip_output.c:130
[<ffffffff851cf120>] synproxy_send_tcp.isra.0+0x3de/0x5d2 net/netfilter/nf_synproxy_core.c:439
[<ffffffff851d10a0>] synproxy_send_client_synack+0x940/0xc9a net/netfilter/nf_synproxy_core.c:484
[<ffffffff852a715c>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline]
[<ffffffff852a715c>] nft_synproxy_do_eval+0x8ac/0xa52 net/netfilter/nft_synproxy.c:141
[<ffffffff852a7360>] nft_synproxy_eval+0x28/0x36 net/netfilter/nft_synproxy.c:247
[<ffffffff851dd7b2>] expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
[<ffffffff851dd7b2>] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:288
[<ffffffff8523728c>] nft_do_chain_inet+0x180/0x316 net/netfilter/nft_chain_filter.c:161
[<ffffffff85112720>] nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
[<ffffffff85112720>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:626
[<ffffffff8533037a>] nf_hook include/linux/netfilter.h:269 [inline]
[<ffffffff8533037a>] NF_HOOK include/linux/netfilter.h:312 [inline]
[<ffffffff8533037a>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff8532ee22>] dst_input include/net/dst.h:460 [inline]
[<ffffffff8532ee22>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:449
[<ffffffff853306ce>] NF_HOOK include/linux/netfilter.h:314 [inline]
[<ffffffff853306ce>] NF_HOOK include/linux/netfilter.h:308 [inline]
[<ffffffff853306ce>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:569
[<ffffffff84d21a44>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5662
[<ffffffff84d21cc4>] __netif_receive_skb+0x2c/0x144 net/core/dev.c:5775
[<ffffffff84d22d48>] process_backlog+0x4fc/0x1cbc net/core/dev.c:6107
[<ffffffff84d275fa>] __napi_poll.constprop.0+0xaa/0x4b8 net/core/dev.c:6771
[<ffffffff84d2841a>] napi_poll net/core/dev.c:6840 [inline]
[<ffffffff84d2841a>] net_rx_action+0xa12/0xf10 net/core/dev.c:6962
[<ffffffff800e0faa>] handle_softirqs+0x4a6/0x10de kernel/softirq.c:554
[<ffffffff85ffcca8>] __do_softirq+0x12/0x1a kernel/softirq.c:588
[<ffffffff80006f74>] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:85
[<ffffffff85ffcc0a>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:355