INFO: task syz-executor:3171 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc1-syzkaller-g306e57988197 #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:0     pid:3171  tgid:3171  ppid:1      task_flags:0x40054c flags:0x0000000c
Call Trace:
[<ffffffff86307720>] context_switch kernel/sched/core.c:5396 [inline]
[<ffffffff86307720>] __schedule+0x1022/0x4094 kernel/sched/core.c:6785
[<ffffffff8630a856>] __schedule_loop kernel/sched/core.c:6863 [inline]
[<ffffffff8630a856>] schedule+0xc4/0x35e kernel/sched/core.c:6878
[<ffffffff8631edea>] schedule_timeout+0x1c6/0x2ae kernel/time/sleep_timeout.c:75
[<ffffffff8630c3de>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff8630c3de>] __wait_for_common+0x1d2/0x3e8 kernel/sched/completion.c:116
[<ffffffff8630c60e>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff8630c60e>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:148
[<ffffffff80375b84>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:3850
[<ffffffff85105ec4>] netdev_run_todo+0x294/0x10b4 net/core/dev.c:11376
[<ffffffff8513609c>] 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
[<ffffffff80070c0e>] arch_do_signal_or_restart+0x5d8/0x24c6 arch/riscv/kernel/signal.c:431
[<ffffffff803b54e6>] exit_to_user_mode_loop+0x90/0x134 kernel/entry/common.c:111
[<ffffffff862fcc8c>] exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
[<ffffffff862fcc8c>] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
[<ffffffff862fcc8c>] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
[<ffffffff862fcc8c>] do_trap_ecall_u+0x3f0/0x530 arch/riscv/kernel/traps.c:355
[<ffffffff863250ca>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197

Showing all locks held in the system:
2 locks held by kworker/0:0/9:
3 locks held by kworker/0:1/10:
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
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
2 locks held by syslogd/2985:
2 locks held by getty/3137:
 #0: ffffaf801cfb30a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ffff8f800008b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e4/0x12b6 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/3165:
1 lock held by syz-executor/3171:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
1 lock held by syz-executor/3174:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
4 locks held by kworker/u10:4/3180:
2 locks held by kworker/0:2/3213:
1 lock held by kworker/R-wg-cr/3341:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531
1 lock held by kworker/R-wg-cr/3347:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531
2 locks held by kworker/R-wg-cr/3350:
1 lock held by kworker/R-wg-cr/3396:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531
1 lock held by kworker/R-wg-cr/3400:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531
1 lock held by kworker/R-wg-cr/3403:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531
2 locks held by kworker/0:3/3812:
2 locks held by kworker/1:4/3876:
2 locks held by kworker/0:5/4205:
3 locks held by kworker/u10:2/4253:
2 locks held by kworker/0:4/4649:
2 locks held by kworker/0:6/4671:
2 locks held by kworker/0:7/4689:
2 locks held by kworker/0:10/4780:
2 locks held by kworker/0:11/4853:
1 lock held by kworker/R-wg-cr/5032:
1 lock held by kworker/R-wg-cr/5035:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531
1 lock held by kworker/R-wg-cr/5038:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531
1 lock held by kworker/R-wg-cr/5088:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531
1 lock held by kworker/R-wg-cr/5091:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531
1 lock held by kworker/R-wg-cr/5094:
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffffffff88291a28 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x776/0xd68 kernel/workqueue.c:3531
2 locks held by kworker/0:12/5389:
3 locks held by kworker/u10:8/5500:
2 locks held by kworker/0:13/5506:
1 lock held by syz.3.350/5576:
2 locks held by syz.2.349/5574:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller-g306e57988197 #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
[<ffffffff862bf364>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff862bf61c>] 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
[<ffffffff863251ea>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 3350 Comm: kworker/R-wg-cr Not tainted 6.16.0-rc1-syzkaller-g306e57988197 #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 : ffff8f8000007410
 gp : ffffffff89c7e9c0 tp : ffffaf8019163480 t0 : ffff8f8000007430
 t1 : 0000000000000000 t2 : fffffffff2f20000 s0 : ffff8f8000007460
 s1 : 0000000000000102 a0 : 0000000000000000 a1 : ffffffff87d6da40
 a2 : 0000000000000003 a3 : 0000000000000101 a4 : 0000000000000001
 a5 : 000000000003ff94 a6 : 0000000000f00000 a7 : 0000000000000000
 s2 : ffffaf8019163480 s3 : ffffffff859e9a76 s4 : 0000000000000001
 s5 : ffffffff910373c0 s6 : 1ffff5f00322c691 s7 : ffffffff89cbf9c0
 s8 : ffff8f80000076a0 s9 : dfffffff00000000 s10: ffff8f8000007640
 s11: ffffaf803799f400 t3 : 1ffff5f006039f02 t4 : ffffffff876a8388
 t5 : ffffaf8013ec0128 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
[<ffffffff859e9a9a>] local_bh_enable include/linux/bottom_half.h:33 [inline]
[<ffffffff859e9a9a>] ipt_do_table+0xe88/0x1c82 net/ipv4/netfilter/ip_tables.c:357
[<ffffffff855127e8>] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
[<ffffffff855127e8>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff8573764a>] nf_hook include/linux/netfilter.h:272 [inline]
[<ffffffff8573764a>] NF_HOOK include/linux/netfilter.h:315 [inline]
[<ffffffff8573764a>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff85735700>] dst_input include/net/dst.h:469 [inline]
[<ffffffff85735700>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:447
[<ffffffff8573799e>] NF_HOOK include/linux/netfilter.h:317 [inline]
[<ffffffff8573799e>] NF_HOOK include/linux/netfilter.h:311 [inline]
[<ffffffff8573799e>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:567
[<ffffffff850f58a8>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5977
[<ffffffff850f5b28>] __netif_receive_skb+0x2c/0x144 net/core/dev.c:6090
[<ffffffff850f6d28>] process_backlog+0x4f6/0x1cb0 net/core/dev.c:6442
[<ffffffff850fb6c2>] __napi_poll.constprop.0+0xaa/0x4ba net/core/dev.c:7414
[<ffffffff850fc5a6>] napi_poll net/core/dev.c:7478 [inline]
[<ffffffff850fc5a6>] net_rx_action+0xad4/0xefc net/core/dev.c:7605
[<ffffffff8015e7ae>] handle_softirqs+0x4b2/0x132e kernel/softirq.c:579
[<ffffffff863252e4>] __do_softirq+0x12/0x1a kernel/softirq.c:613
[<ffffffff8006845c>] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:85
[<ffffffff86325232>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:360