INFO: task syz-executor:3226 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc7-syzkaller-g7b388bf7a9d9 #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:0     pid:3226  tgid:3226  ppid:1      task_flags:0x40054c flags:0x0000000c
Call Trace:
[<ffffffff86408686>] context_switch kernel/sched/core.c:5397 [inline]
[<ffffffff86408686>] __schedule+0x105c/0x4088 kernel/sched/core.c:6786
[<ffffffff8640b776>] __schedule_loop kernel/sched/core.c:6864 [inline]
[<ffffffff8640b776>] schedule+0xc4/0x35e kernel/sched/core.c:6879
[<ffffffff8641fdaa>] schedule_timeout+0x1c6/0x2b2 kernel/time/sleep_timeout.c:75
[<ffffffff8640d312>] do_wait_for_common+0x1c2/0x3d0 kernel/sched/completion.c:95
[<ffffffff8640d850>] __wait_for_common kernel/sched/completion.c:116 [inline]
[<ffffffff8640d850>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff8640d850>] wait_for_completion+0x40/0x5c kernel/sched/completion.c:148
[<ffffffff80384ed8>] rcu_barrier+0x2e4/0x66c kernel/rcu/tree.c:3854
[<ffffffff851dd754>] netdev_run_todo+0x2bc/0x10de net/core/dev.c:11376
[<ffffffff8520cf98>] rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:157
[<ffffffff83352120>] tun_detach drivers/net/tun.c:639 [inline]
[<ffffffff83352120>] tun_chr_close+0xde/0x230 drivers/net/tun.c:3396
[<ffffffff80c0b2e0>] __fput+0x382/0xa8c fs/file_table.c:465
[<ffffffff80c0ba98>] ____fput+0x1c/0x26 fs/file_table.c:493
[<ffffffff801e3128>] task_work_run+0x16a/0x25e kernel/task_work.c:227
[<ffffffff8015ebcc>] exit_task_work include/linux/task_work.h:40 [inline]
[<ffffffff8015ebcc>] do_exit+0x866/0x28b6 kernel/exit.c:964
[<ffffffff8016117c>] do_group_exit+0xd4/0x26c kernel/exit.c:1105
[<ffffffff8019a594>] get_signal+0x208c/0x230c kernel/signal.c:3034
[<ffffffff80073a80>] arch_do_signal_or_restart+0x6ba/0x1cd4 arch/riscv/kernel/signal.c:534
[<ffffffff803c1b2e>] exit_to_user_mode_loop+0x90/0x134 kernel/entry/common.c:111
[<ffffffff863fdbc0>] exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
[<ffffffff863fdbc0>] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
[<ffffffff863fdbc0>] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
[<ffffffff863fdbc0>] do_trap_ecall_u+0x3f0/0x530 arch/riscv/kernel/traps.c:357
[<ffffffff864262fe>] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:231

Showing all locks held in the system:
2 locks held by ksoftirqd/0/15:
1 lock held by khungtaskd/36:
 #0: ffffffff885dbd80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766
2 locks held by getty/3169:
 #0: ffffaf801d6dc0a0 (&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+0x3e4/0x12ba drivers/tty/n_tty.c:2222
2 locks held by syz-executor/3213:
1 lock held by syz-executor/3226:
 #0: ffffffff885ebe80 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x66c kernel/rcu/tree.c:3786
2 locks held by kworker/1:2/4774:
1 lock held by syz.0.1762/8455:
 #0: ffffffff885ebe80 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x66c kernel/rcu/tree.c:3786
5 locks held by kworker/0:3/9858:
4 locks held by syz-executor/9869:
 #0: ffffffff89a53430 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x25a/0x64a net/core/net_namespace.c:570
 #1: ffffffff896f3d50 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x29c/0x5de drivers/infiniband/core/device.c:1178
 #2: ffffffff896f41b0 (rdma_nets_rwsem){.+.+}-{4:4}, at: rdma_dev_init_net+0x302/0x5de drivers/infiniband/core/device.c:1183
 #3: ffffaf801b450f68 (&device->compat_devs_mutex){+.+.}-{4:4}, at: add_one_compat_dev+0x110/0x74e drivers/infiniband/core/device.c:942
5 locks held by syz-executor/9876:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 36 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller-g7b388bf7a9d9 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007b6f0>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff80003298>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff80062c2c>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80062c2c>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff80062cc0>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff863c038a>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff863c0650>] nmi_trigger_cpumask_backtrace+0x2c4/0x466 lib/nmi_backtrace.c:62
[<ffffffff80089546>] arch_trigger_cpumask_backtrace+0x2c/0x42 arch/riscv/kernel/smp.c:350
[<ffffffff804fa5a8>] trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
[<ffffffff804fa5a8>] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
[<ffffffff804fa5a8>] watchdog+0xd0e/0x11fe kernel/hung_task.c:470
[<ffffffff801e9036>] kthread+0x3a4/0x7e0 kernel/kthread.c:464
[<ffffffff8006b974>] ret_from_fork_kernel+0x2a/0xbec arch/riscv/kernel/process.c:228
[<ffffffff8642642e>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:362
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9889 Comm: kworker/u9:0 Not tainted 6.16.0-rc7-syzkaller-g7b388bf7a9d9 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_unbound macvlan_process_broadcast
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+0x3aa/0x612 kernel/softirq.c:414
 ra : __local_bh_enable_ip+0x3a6/0x612 kernel/softirq.c:412
epc : ffffffff80169d58 ra : ffffffff80169d54 sp : ffff8f8000006af0
 gp : ffffffff89e816e0 tp : ffffaf801cc2b480 t0 : ffff8f80000069b0
 t1 : 0000000000000130 t2 : fffffffff2f20000 s0 : ffff8f8000006b40
 s1 : 0000000000000102 a0 : 0000000000000000 a1 : ffffffff87f7bcd0
 a2 : 0000000000000003 a3 : 0000000000000101 a4 : 0000000000000001
 a5 : 000000000000fb08 a6 : 0000000000000003 a7 : 0000000000000000
 s2 : ffffaf801cc2b480 s3 : ffffffff85ad6b88 s4 : 0000000000000001
 s5 : ffffffff9123a400 s6 : 1ffff5f003985691 s7 : ffffffff89ec28a0
 s8 : ffff8f8000006d80 s9 : dfffffff00000000 s10: ffff8f8000006d20
 s11: ffffaf803c5dfd00 t3 : 1ffff5f003873a03 t4 : ffffaf801d9de128
 t5 : ffffffff878affa8 t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff80169d58>] arch_local_irq_enable arch/riscv/include/asm/irqflags.h:21 [inline]
[<ffffffff80169d58>] __local_bh_enable_ip+0x3aa/0x612 kernel/softirq.c:412
[<ffffffff85ad6bac>] local_bh_enable include/linux/bottom_half.h:33 [inline]
[<ffffffff85ad6bac>] ipt_do_table+0xec6/0x1ce0 net/ipv4/netfilter/ip_tables.c:357
[<ffffffff855f00a6>] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
[<ffffffff855f00a6>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff85839a6a>] nf_hook include/linux/netfilter.h:272 [inline]
[<ffffffff85839a6a>] __ip_local_out+0x4a4/0xbe4 net/ipv4/ip_output.c:118
[<ffffffff8583a1d8>] ip_local_out+0x2e/0x1a8 net/ipv4/ip_output.c:127
[<ffffffff856b1ad0>] synproxy_send_tcp.isra.0+0x3de/0x5d2 net/netfilter/nf_synproxy_core.c:439
[<ffffffff856b3a90>] synproxy_send_client_synack+0x6cc/0x94e net/netfilter/nf_synproxy_core.c:484
[<ffffffff8578fa62>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline]
[<ffffffff8578fa62>] nft_synproxy_do_eval+0x858/0xab8 net/netfilter/nft_synproxy.c:141
[<ffffffff8578fd20>] nft_synproxy_eval+0x28/0x4e net/netfilter/nft_synproxy.c:247
[<ffffffff856c017a>] expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
[<ffffffff856c017a>] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:285
[<ffffffff8571ab46>] nft_do_chain_inet+0x180/0x34c net/netfilter/nft_chain_filter.c:161
[<ffffffff855f00a6>] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
[<ffffffff855f00a6>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff8581dbf2>] nf_hook include/linux/netfilter.h:272 [inline]
[<ffffffff8581dbf2>] NF_HOOK include/linux/netfilter.h:315 [inline]
[<ffffffff8581dbf2>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff8581bc6e>] dst_input include/net/dst.h:469 [inline]
[<ffffffff8581bc6e>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:448
[<ffffffff8581df46>] NF_HOOK include/linux/netfilter.h:317 [inline]
[<ffffffff8581df46>] NF_HOOK include/linux/netfilter.h:311 [inline]
[<ffffffff8581df46>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:568
[<ffffffff851cceae>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5977
[<ffffffff851cd130>] __netif_receive_skb+0x2e/0x146 net/core/dev.c:6090
[<ffffffff851ce3c6>] process_backlog+0x4fe/0x1dc8 net/core/dev.c:6442
[<ffffffff851d1924>] __napi_poll.constprop.0+0xaa/0x4c2 net/core/dev.c:7414
[<ffffffff851d287e>] napi_poll net/core/dev.c:7478 [inline]
[<ffffffff851d287e>] net_rx_action+0xb42/0xffa net/core/dev.c:7605
[<ffffffff80167428>] handle_softirqs+0x500/0x1436 kernel/softirq.c:579
[<ffffffff86426528>] __do_softirq+0x12/0x1a kernel/softirq.c:613
[<ffffffff8006a522>] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:85
[<ffffffff86426476>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:395