INFO: task syz.1.923:6245 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.923       state:D stack:0     pid:6245  tgid:6245  ppid:3197   task_flags:0x40064c 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
[<ffffffff801563ca>] exit_task_work include/linux/task_work.h:40 [inline]
[<ffffffff801563ca>] do_exit+0x844/0x28ca kernel/exit.c:955
[<ffffffff801589b0>] do_group_exit+0xd4/0x26c kernel/exit.c:1104
[<ffffffff80190b0a>] get_signal+0x207c/0x22fc kernel/signal.c:3034
[<ffffffff8007073c>] arch_do_signal_or_restart+0x106/0x24c6 arch/riscv/kernel/signal.c:431
[<ffffffff86324654>] exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
[<ffffffff86324654>] exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
[<ffffffff86324654>] irqentry_exit_to_user_mode+0x2c6/0x3b6 kernel/entry/common.c:184
[<ffffffff8632484e>] irqentry_exit+0x10a/0x18c kernel/entry/common.c:287
[<ffffffff8632351a>] do_page_fault+0x3e/0x56 arch/riscv/kernel/traps.c:376
[<ffffffff8634b7da>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197

Showing all locks held in the system:
1 lock held by khungtaskd/37:
 #0: ffffffff883dc420 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766
3 locks held by kworker/u9:3/66:
 #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3213
 #1: ffff8f8000517b70 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3213
 #2: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
1 lock held by jbd2/vda-8/2984:
2 locks held by getty/3159:
 #0: ffffaf801d52d0a0 (&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
2 locks held by sshd/3181:
2 locks held by syz-executor/3183:
2 locks held by kworker/1:5/4771:
2 locks held by kworker/0:5/5448:
2 locks held by kworker/1:4/5650:
3 locks held by kworker/1:2/6000:
1 lock held by syz.1.923/6245:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
2 locks held by kworker/1:0/6367:
2 locks held by kworker/1:6/6369:
3 locks held by kworker/1:7/6372:
3 locks held by kworker/u9:6/6374:
7 locks held by syz-executor/6378:
5 locks held by kworker/u9:8/6491:
2 locks held by rm/6717:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 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: 4771 Comm: kworker/1:5 Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: wg-crypt-wg2 wg_packet_tx_worker
epc : preempt_count include/asm-generic/preempt.h:11 [inline]
epc : should_resched include/asm-generic/preempt.h:77 [inline]
epc : __local_bh_enable_ip+0x38e/0x5e8 kernel/softirq.c:414
 ra : __local_bh_enable_ip+0x38a/0x5e8 kernel/softirq.c:412
epc : ffffffff80160e9a ra : ffffffff80160e96 sp : ffff8f8000016b10
 gp : ffffffff89c83ca0 tp : ffffaf8018a98000 t0 : ffff8f80000169d0
 t1 : 0000000000000130 t2 : fffffffff2f20000 s0 : ffff8f8000016b60
 s1 : 0000000000000102 a0 : 0000000000000001 a1 : ffffffff87d71b68
 a2 : 0000000000000003 a3 : 0000000000000101 a4 : 0000000000000001
 a5 : 000000000017710a a6 : 0000000000f00000 a7 : 0000000000000000
 s2 : ffffaf8018a98000 s3 : ffffffff85a1066e s4 : 0000000000000001
 s5 : ffffffff9103c3c0 s6 : 1ffff5f003153001 s7 : ffffffff89cc4ca0
 s8 : ffff8f8000016da0 s9 : dfffffff00000000 s10: ffff8f8000016d40
 s11: ffffaf803988d300 t3 : 1ffff5f00729d803 t4 : ffffaf801c28c128
 t5 : ffffffff876aac08 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff80160e9a>] arch_local_irq_enable arch/riscv/include/asm/irqflags.h:21 [inline]
[<ffffffff80160e9a>] __local_bh_enable_ip+0x38e/0x5e8 kernel/softirq.c:412
[<ffffffff85a10692>] local_bh_enable include/linux/bottom_half.h:33 [inline]
[<ffffffff85a10692>] ipt_do_table+0xe88/0x1c82 net/ipv4/netfilter/ip_tables.c:357
[<ffffffff855393e0>] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
[<ffffffff855393e0>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff85779a5e>] nf_hook include/linux/netfilter.h:272 [inline]
[<ffffffff85779a5e>] __ip_local_out+0x498/0xbb2 net/ipv4/ip_output.c:118
[<ffffffff8577a1a6>] ip_local_out+0x2e/0x1a8 net/ipv4/ip_output.c:127
[<ffffffff855f6d30>] synproxy_send_tcp.isra.0+0x3de/0x5d2 net/netfilter/nf_synproxy_core.c:439
[<ffffffff855f8b5c>] synproxy_send_client_synack+0x6dc/0x8be net/netfilter/nf_synproxy_core.c:484
[<ffffffff856d2494>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline]
[<ffffffff856d2494>] nft_synproxy_do_eval+0x8ac/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