INFO: task syz.1.439:5070 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:syz.1.439       state:D stack:0     pid:5070  tgid:5070  ppid:3196   task_flags:0x400040 flags:0x0000000c
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
[<ffffffff8512e194>] netdev_run_todo+0x294/0x10b4 net/core/dev.c:11376
[<ffffffff8515e36c>] rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:157
[<ffffffff832f516a>] tun_detach drivers/net/tun.c:639 [inline]
[<ffffffff832f516a>] tun_chr_close+0xde/0x230 drivers/net/tun.c:3396
[<ffffffff80bfbe7a>] __fput+0x382/0xa8c fs/file_table.c:465
[<ffffffff80bfc632>] ____fput+0x1c/0x26 fs/file_table.c:493
[<ffffffff801d7c16>] task_work_run+0x16a/0x25e kernel/task_work.c:227
[<ffffffff803b556e>] resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
[<ffffffff803b556e>] exit_to_user_mode_loop+0x118/0x134 kernel/entry/common.c:114
[<ffffffff8632339c>] exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
[<ffffffff8632339c>] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
[<ffffffff8632339c>] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
[<ffffffff8632339c>] do_trap_ecall_u+0x3f0/0x530 arch/riscv/kernel/traps.c:355
[<ffffffff8634b7da>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197

Showing all locks held in the system:
1 lock held by kworker/R-mm_pe/14:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2678
4 locks held by ksoftirqd/1/24:
2 locks held by kworker/1:1/37:
1 lock held by khungtaskd/38:
 #0: ffffffff883dc420 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766
2 locks held by kworker/1:2/1000:
3 locks held by kworker/u9:6/1108:
1 lock held by klogd/3007:
2 locks held by getty/3155:
 #0: ffffaf801b5c00a0 (&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:
4 locks held by syz-executor/3193:
2 locks held by kworker/u9:0/3197:
1 lock held by kworker/R-wg-cr/3382:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/3385:
3 locks held by kworker/R-wg-cr/3394:
1 lock held by kworker/R-wg-cr/3397:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2678
2 locks held by kworker/1:3/3834:
2 locks held by kworker/1:4/3892:
2 locks held by kworker/1:5/4049:
3 locks held by kworker/1:0/4929:
2 locks held by kworker/1:6/4940:
2 locks held by kworker/1:7/5020:
2 locks held by kworker/1:8/5030:
2 locks held by kworker/1:9/5035:
2 locks held by kworker/1:10/5051:
1 lock held by kworker/1:11/5060:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2678
1 lock held by syz.1.439/5070:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
2 locks held by kworker/1:12/5126:
2 locks held by kworker/1:13/5197:
1 lock held by kworker/R-wg-cr/5221:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5224:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2678
1 lock held by kworker/R-wg-cr/5227:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x36/0x3c4 kernel/workqueue.c:2678
2 locks held by kworker/1:14/5237:
2 locks held by kworker/1:15/5299:
2 locks held by kworker/1:16/5467:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 38 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: 3892 Comm: kworker/1:4 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 : __call_rcu_common.constprop.0+0x264/0x9ce kernel/rcu/tree.c:3116
 ra : __call_rcu_common.constprop.0+0x312/0x9ce kernel/rcu/tree.c:3115
epc : ffffffff80383b5a ra : ffffffff80383c08 sp : ffff8f8000017050
 gp : ffffffff89c83ca0 tp : ffffaf802f9f0000 t0 : ffff8f8000016fe0
 t1 : 0000000000000001 t2 : 1ffff1f000002cac s0 : ffff8f80000170d0
 s1 : ffffaf806ed5df80 a0 : 0000000000000001 a1 : ffffffff87d71b68
 a2 : 0000000000000003 a3 : 0000000000000101 a4 : 0000000000000001
 a5 : 0000000000000000 a6 : 0000000000f00000 a7 : ffffffffcd8fea73
 s2 : ffffaf803ed78750 s3 : ffffaf806ed5e070 s4 : 0000000000000002
 s5 : ffffaf806ed5e028 s6 : 1ffff5f00ddabc0e s7 : 1ffff5f00ddabc14
 s8 : ffffaf806ed5e0a0 s9 : 00000000000542fb s10: ffff8f8000017280
 s11: ffffaf801d0e4414 t3 : e7f3346000000000 t4 : 0000000000001fff
 t5 : 00000000000000c8 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff80383b5a>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff80383b5a>] __call_rcu_common.constprop.0+0x264/0x9ce kernel/rcu/tree.c:3115
[<ffffffff803842e4>] call_rcu+0xc/0x14 kernel/rcu/tree.c:3210
[<ffffffff8513d604>] call_rcu_hurry include/linux/rcupdate.h:115 [inline]
[<ffffffff8513d604>] dst_release net/core/dst.c:177 [inline]
[<ffffffff8513d604>] dst_release+0x338/0x494 net/core/dst.c:165
[<ffffffff8508f6c6>] refdst_drop include/net/dst.h:263 [inline]
[<ffffffff8508f6c6>] skb_dst_drop include/net/dst.h:275 [inline]
[<ffffffff8508f6c6>] skb_release_head_state+0x25a/0x2b6 net/core/skbuff.c:1136
[<ffffffff8509d422>] skb_release_all net/core/skbuff.c:1150 [inline]
[<ffffffff8509d422>] __kfree_skb net/core/skbuff.c:1166 [inline]
[<ffffffff8509d422>] consume_skb net/core/skbuff.c:1398 [inline]
[<ffffffff8509d422>] consume_skb+0x9e/0xfa net/core/skbuff.c:1392
[<ffffffff856d249e>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:60 [inline]
[<ffffffff856d249e>] nft_synproxy_do_eval+0x8b6/0xa52 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
[<ffffffff8634b9f4>] __do_softirq+0x12/0x1a kernel/softirq.c:613
[<ffffffff8006845c>] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:85
[<ffffffff8634b942>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:360