INFO: task syz.2.1715:8716 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.2.1715      state:D stack:0     pid:8716  tgid:8711  ppid:7334   task_flags:0x400140 flags:0x0000000c
Call Trace:
[<ffffffff8632f9f0>] context_switch kernel/sched/core.c:5396 [inline]
[<ffffffff8632f9f0>] __schedule+0x1022/0x4094 kernel/sched/core.c:6785
[<ffffffff86332b26>] __schedule_loop kernel/sched/core.c:6863 [inline]
[<ffffffff86332b26>] schedule+0xc4/0x35e kernel/sched/core.c:6878
[<ffffffff863470ba>] schedule_timeout+0x1c6/0x2ae kernel/time/sleep_timeout.c:75
[<ffffffff863346ae>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff863346ae>] __wait_for_common+0x1d2/0x3e8 kernel/sched/completion.c:116
[<ffffffff863348de>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff863348de>] 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
[<ffffffff85cdeb76>] ip6_mroute_setsockopt+0x1424/0x584a net/ipv6/ip6mr.c:1768
[<ffffffff85c18686>] do_ipv6_setsockopt+0x3da/0x41e4 net/ipv6/ipv6_sockglue.c:415
[<ffffffff85c1c558>] ipv6_setsockopt+0xc8/0x16e net/ipv6/ipv6_sockglue.c:993
[<ffffffff85c46cb8>] rawv6_setsockopt+0xe8/0x662 net/ipv6/raw.c:1046
[<ffffffff850543cc>] sock_common_setsockopt+0x90/0xc0 net/core/sock.c:3944
[<ffffffff85045086>] do_sock_setsockopt+0x208/0x400 net/socket.c:2296
[<ffffffff850509e0>] __sys_setsockopt+0x142/0x1e6 net/socket.c:2321
[<ffffffff85050b2a>] __do_sys_setsockopt net/socket.c:2327 [inline]
[<ffffffff85050b2a>] __se_sys_setsockopt net/socket.c:2324 [inline]
[<ffffffff85050b2a>] __riscv_sys_setsockopt+0xa6/0x114 net/socket.c:2324
[<ffffffff800769ae>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:112
[<ffffffff86324f02>] do_trap_ecall_u+0x396/0x530 arch/riscv/kernel/traps.c:341
[<ffffffff8634d39a>] 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:
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
1 lock held by klogd/3006:
2 locks held by getty/3155:
 #0: ffffaf801aec00a0 (&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 syz-executor/3183:
2 locks held by kworker/1:5/4478:
3 locks held by kworker/u10:3/5567:
2 locks held by kworker/0:3/7072:
3 locks held by kworker/u10:1/7181:
4 locks held by kworker/u8:3/7517:
2 locks held by kworker/0:1/8301:
2 locks held by kworker/0:2/8447:
2 locks held by kworker/u10:6/8452:
4 locks held by kworker/u10:8/8468:
2 locks held by kworker/0:8/8470:
1 lock held by syz.0.1698/8471:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
2 locks held by kworker/0:10/8491:
1 lock held by syz-executor/8493:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
2 locks held by kworker/0:12/8578:
1 lock held by syz.2.1715/8716:
 #0: ffffffff883ec640 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
1 lock held by syz-executor/8843:
 #0: ffffffff8986c1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #0: ffffffff8986c1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
 #0: ffffffff8986c1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x64c/0x1d78 net/core/rtnetlink.c:4054
3 locks held by kworker/u10:9/8855:
2 locks held by syz-executor/9120:
3 locks held by kworker/u10:11/9192:
 #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3213
 #1: ffff8f8004d27b70 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3213
 #2: ffffffff8986c1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:80
3 locks held by kworker/u8:1/9200:
 #0: ffffaf8012326948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3213
 #1: ffff8f8004ca7b70 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3213
 #2: ffffffff8986c1c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:80

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

NMI backtrace for cpu 1
CPU: 1 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
[<ffffffff862e7634>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff862e78ec>] 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
[<ffffffff8634d4ba>] 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: 8452 Comm: kworker/u10:6 Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_unbound nsim_dev_trap_report_work
epc : __sanitizer_cov_trace_pc+0x0/0x78 kernel/kcov.c:210
 ra : arch_local_irq_save arch/riscv/include/asm/irqflags.h:33 [inline]
 ra : seqcount_lockdep_reader_access include/linux/seqlock.h:71 [inline]
 ra : nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:333 [inline]
 ra : ____nf_conntrack_find net/netfilter/nf_conntrack_core.c:747 [inline]
 ra : __nf_conntrack_find_get+0xca/0x908 net/netfilter/nf_conntrack_core.c:783
epc : ffffffff804eba10 ra : ffffffff8556a8c6 sp : ffff8f8000006a90
 gp : ffffffff89c83e20 tp : ffffaf801151b480 t0 : ffff8f8000006d18
 t1 : fffffffff3f3f3f3 t2 : fffffffff2f20000 s0 : ffff8f8000006bd0
 s1 : 0000000004ce225b a0 : ffffaf801c2d0000 a1 : ffffffff88017de0
 a2 : 0000000000f00000 a3 : ffffffff8556a892 a4 : 0000000004ce225b
 a5 : fffff5ef0385a225 a6 : 765e4e6447380000 a7 : 6e94103d724fc000
 s2 : ffffaf8031e6c140 s3 : dfffffff00000000 s4 : ffff8f8000006ef0
 s5 : ffff8f8000006b60 s6 : fffffffef1042838 s7 : 0000000000000000
 s8 : ffffffff882141c0 s9 : ffffaf801c2d0000 s10: ffffffff87643600
 s11: ffff8f8000006cf0 t3 : 1ffff5f0060fd503 t4 : ffffaf8019020128
 t5 : ffffffff876aacc8 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff804eba10>] __sanitizer_cov_trace_pc+0x0/0x78 kernel/kcov.c:442
[<ffffffff8556bd6a>] resolve_normal_ct net/netfilter/nf_conntrack_core.c:1873 [inline]
[<ffffffff8556bd6a>] nf_conntrack_in+0x4da/0x1c3c net/netfilter/nf_conntrack_core.c:2037
[<ffffffff8557c7a8>] ipv4_conntrack_local+0xf6/0x200 net/netfilter/nf_conntrack_proto.c:229
[<ffffffff8553aab8>] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
[<ffffffff8553aab8>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff8577b136>] nf_hook include/linux/netfilter.h:272 [inline]
[<ffffffff8577b136>] __ip_local_out+0x498/0xbb2 net/ipv4/ip_output.c:118
[<ffffffff8577b87e>] ip_local_out+0x2e/0x1a8 net/ipv4/ip_output.c:127
[<ffffffff855f8408>] synproxy_send_tcp.isra.0+0x3de/0x5d2 net/netfilter/nf_synproxy_core.c:439
[<ffffffff855fa234>] synproxy_send_client_synack+0x6dc/0x8be net/netfilter/nf_synproxy_core.c:484
[<ffffffff856d3b6c>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline]
[<ffffffff856d3b6c>] nft_synproxy_do_eval+0x8ac/0xa52 net/netfilter/nft_synproxy.c:141
[<ffffffff856d3d70>] nft_synproxy_eval+0x28/0x36 net/netfilter/nft_synproxy.c:247
[<ffffffff8560569a>] expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
[<ffffffff8560569a>] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:285
[<ffffffff85661858>] nft_do_chain_inet+0x180/0x316 net/netfilter/nft_chain_filter.c:161
[<ffffffff8553aab8>] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
[<ffffffff8553aab8>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff8575f91a>] nf_hook include/linux/netfilter.h:272 [inline]
[<ffffffff8575f91a>] NF_HOOK include/linux/netfilter.h:315 [inline]
[<ffffffff8575f91a>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:254
[<ffffffff8575d9d0>] dst_input include/net/dst.h:469 [inline]
[<ffffffff8575d9d0>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:447
[<ffffffff8575fc6e>] NF_HOOK include/linux/netfilter.h:317 [inline]
[<ffffffff8575fc6e>] NF_HOOK include/linux/netfilter.h:311 [inline]
[<ffffffff8575fc6e>] 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
[<ffffffff8634d5b4>] __do_softirq+0x12/0x1a kernel/softirq.c:613
[<ffffffff8006845c>] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:85
[<ffffffff8634d502>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:360