INFO: task syz.0.745:5906 blocked for more than 430 seconds.
      Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.745       state:D stack:0     pid:5906  tgid:5900  ppid:3207   task_flags:0x400140 flags:0x0000000c
Call Trace:
[<ffffffff863ce5c0>] context_switch kernel/sched/core.c:5357 [inline]
[<ffffffff863ce5c0>] __schedule+0x1042/0x4106 kernel/sched/core.c:6961
[<ffffffff863d1748>] __schedule_loop kernel/sched/core.c:7043 [inline]
[<ffffffff863d1748>] schedule+0xc4/0x35e kernel/sched/core.c:7058
[<ffffffff863e72b2>] schedule_timeout+0x1c6/0x2ae kernel/time/sleep_timeout.c:75
[<ffffffff863d32fe>] do_wait_for_common kernel/sched/completion.c:100 [inline]
[<ffffffff863d32fe>] __wait_for_common+0x1d2/0x3e8 kernel/sched/completion.c:121
[<ffffffff863d352e>] wait_for_common kernel/sched/completion.c:132 [inline]
[<ffffffff863d352e>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:153
[<ffffffff8038232e>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:3883
[<ffffffff851da756>] netdev_run_todo+0x294/0x10b4 net/core/dev.c:11460
[<ffffffff8520b8f4>] rtnl_unlock+0x14/0x1c net/core/rtnetlink.c:157
[<ffffffff852a43b0>] rtnl_net_unlock include/linux/rtnetlink.h:135 [inline]
[<ffffffff852a43b0>] dev_ioctl+0x8a2/0xfb6 net/core/dev_ioctl.c:852
[<ffffffff850f6bc4>] sock_ioctl+0x630/0xc2c net/socket.c:1284
[<ffffffff80c7de48>] vfs_ioctl fs/ioctl.c:51 [inline]
[<ffffffff80c7de48>] __do_sys_ioctl fs/ioctl.c:598 [inline]
[<ffffffff80c7de48>] __se_sys_ioctl fs/ioctl.c:584 [inline]
[<ffffffff80c7de48>] __riscv_sys_ioctl+0x180/0x1e4 fs/ioctl.c:584
[<ffffffff8007715e>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:112
[<ffffffff863c3c76>] do_trap_ecall_u+0x396/0x530 arch/riscv/kernel/traps.c:343
[<ffffffff863ed596>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197

Showing all locks held in the system:
1 lock held by khungtaskd/37:
 #0: ffffffff883dd9a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6771
1 lock held by klogd/3018:
2 locks held by getty/3167:
 #0: ffffaf801c4400a0 (&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/3198:
2 locks held by syz-executor/3200:
2 locks held by kworker/1:2/3202:
3 locks held by kworker/u9:4/3341:
2 locks held by kworker/1:3/3847:
3 locks held by kworker/u9:2/4334:
 #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3211
 #1: ffff8f8006c97b70 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3211
 #2: ffffffff8988bee8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:80
2 locks held by kworker/1:0/5314:
2 locks held by kworker/0:6/5691:
3 locks held by kworker/u9:3/5726:
2 locks held by kworker/1:5/5889:
2 locks held by kworker/1:6/5894:
1 lock held by syz.0.745/5906:
 #0: ffffffff883eda40 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3815
7 locks held by kworker/1:8/5902:
3 locks held by kworker/1:10/5921:
3 locks held by syz-executor/5928:
3 locks held by kworker/u9:7/5943:
2 locks held by syz.1.761/6051:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007949a>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000329a>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff80060b76>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80060b76>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff80060c0a>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff8638596a>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff86385c22>] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62
[<ffffffff8008705c>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:350
[<ffffffff805000a4>] trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
[<ffffffff805000a4>] check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
[<ffffffff805000a4>] watchdog+0xc56/0x1134 kernel/hung_task.c:491
[<ffffffff801e843c>] kthread+0x39c/0x7d4 kernel/kthread.c:463
[<ffffffff800699c4>] ret_from_fork_kernel+0x2a/0xbb4 arch/riscv/kernel/process.c:214
[<ffffffff863ed6b6>] 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: 5314 Comm: kworker/1:0 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: wg-kex-wg0 wg_packet_handshake_receive_worker
epc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
epc : _raw_spin_unlock_irqrestore+0x36/0xd4 kernel/locking/spinlock.c:194
 ra : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
 ra : _raw_spin_unlock_irqrestore+0x86/0xd4 kernel/locking/spinlock.c:194
epc : ffffffff863e8dca ra : ffffffff863e8e1a sp : ffff8f8000016890
 gp : ffffffff89c9e5c0 tp : ffffaf8013390000 t0 : ffff8f80000169f0
 t1 : fffffffef21f4656 t2 : fffffffff2f20000 s0 : ffff8f80000168b0
 s1 : 0000000000000002 a0 : 0000000000000001 a1 : ffffffff87d8a7a8
 a2 : 0000000000000003 a3 : 0000000000000102 a4 : 0000000000000001
 a5 : 0000000000000000 a6 : 0000000000f00000 a7 : ffffffff90fa32b3
 s2 : ffffffff90fa32b0 s3 : ffff8f8000016960 s4 : 0000000000000028
 s5 : ffffffff90fa32b0 s6 : ffffaf803cd56f00 s7 : 1ffff1f000002d18
 s8 : ffffffff90fa32a8 s9 : ffffffff8685a2e0 s10: 0000000200000022
 s11: 1ffff5f005f71a5d t3 : 72f96c7100000000 t4 : fffffffef21f4656
 t5 : fffffffef21f4657 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff863e8dca>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff863e8dca>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
[<ffffffff863e8dca>] _raw_spin_unlock_irqrestore+0x36/0xd4 kernel/locking/spinlock.c:194
[<ffffffff817e3656>] debug_object_activate+0x25e/0x33e lib/debugobjects.c:836
[<ffffffff8038e482>] debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
[<ffffffff8038e482>] __call_rcu_common.constprop.0+0x40/0x9da kernel/rcu/tree.c:3108
[<ffffffff8038ee3c>] call_rcu+0xc/0x14 kernel/rcu/tree.c:3243
[<ffffffff80a7c6e0>] slab_free_hook mm/slub.c:2381 [inline]
[<ffffffff80a7c6e0>] slab_free mm/slub.c:4680 [inline]
[<ffffffff80a7c6e0>] kmem_cache_free+0x16a/0x562 mm/slub.c:4782
[<ffffffff8561a562>] nf_conntrack_free+0x10c/0x4a4 net/netfilter/nf_conntrack_core.c:1747
[<ffffffff8561aa70>] nf_ct_destroy+0x176/0x272 net/netfilter/nf_conntrack_core.c:598
[<ffffffff85620d14>] nf_ct_put include/net/netfilter/nf_conntrack.h:184 [inline]
[<ffffffff85620d14>] nf_ct_put include/net/netfilter/nf_conntrack.h:181 [inline]
[<ffffffff85620d14>] nf_conntrack_in+0x710/0x1c30 net/netfilter/nf_conntrack_core.c:2068
[<ffffffff8563166c>] ipv4_conntrack_local+0xf6/0x200 net/netfilter/nf_conntrack_proto.c:226
[<ffffffff855ef63a>] nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
[<ffffffff855ef63a>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff8582d20a>] nf_hook include/linux/netfilter.h:273 [inline]
[<ffffffff8582d20a>] __ip_local_out+0x49a/0xbb4 net/ipv4/ip_output.c:118
[<ffffffff8582d952>] ip_local_out+0x2e/0x1a8 net/ipv4/ip_output.c:127
[<ffffffff856ad2b8>] synproxy_send_tcp.isra.0+0x3de/0x5d2 net/netfilter/nf_synproxy_core.c:439
[<ffffffff856af0e4>] synproxy_send_client_synack+0x6dc/0x8be net/netfilter/nf_synproxy_core.c:484
[<ffffffff85786f80>] nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline]
[<ffffffff85786f80>] nft_synproxy_do_eval+0x8ac/0xa52 net/netfilter/nft_synproxy.c:141
[<ffffffff85787184>] nft_synproxy_eval+0x28/0x36 net/netfilter/nft_synproxy.c:247
[<ffffffff856ba546>] expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
[<ffffffff856ba546>] nft_do_chain+0x328/0x1598 net/netfilter/nf_tables_core.c:285
[<ffffffff8571656c>] nft_do_chain_inet+0x180/0x316 net/netfilter/nft_chain_filter.c:161
[<ffffffff855ef63a>] nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
[<ffffffff855ef63a>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff85811b2e>] nf_hook include/linux/netfilter.h:273 [inline]
[<ffffffff85811b2e>] NF_HOOK include/linux/netfilter.h:316 [inline]
[<ffffffff85811b2e>] ip_local_deliver+0x2ea/0x568 net/ipv4/ip_input.c:260
[<ffffffff8580f9c6>] dst_input include/net/dst.h:471 [inline]
[<ffffffff8580f9c6>] ip_rcv_finish+0x1b0/0x2d2 net/ipv4/ip_input.c:454
[<ffffffff85811e82>] NF_HOOK include/linux/netfilter.h:318 [inline]
[<ffffffff85811e82>] NF_HOOK include/linux/netfilter.h:312 [inline]
[<ffffffff85811e82>] ip_rcv+0xd6/0x44e net/ipv4/ip_input.c:574
[<ffffffff851c8bc4>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5979
[<ffffffff851c8e44>] __netif_receive_skb+0x2c/0x144 net/core/dev.c:6092
[<ffffffff851ca044>] process_backlog+0x4f6/0x1cb0 net/core/dev.c:6444
[<ffffffff851cd4ac>] __napi_poll.constprop.0+0xaa/0x4ba net/core/dev.c:7489
[<ffffffff851ce392>] napi_poll net/core/dev.c:7552 [inline]
[<ffffffff851ce392>] net_rx_action+0xad6/0xefe net/core/dev.c:7679
[<ffffffff8016778e>] handle_softirqs+0x4b2/0x132e kernel/softirq.c:579
[<ffffffff801688da>] __do_softirq kernel/softirq.c:613 [inline]
[<ffffffff801688da>] invoke_softirq kernel/softirq.c:453 [inline]
[<ffffffff801688da>] __irq_exit_rcu+0x18c/0x550 kernel/softirq.c:680
[<ffffffff8016a2e8>] irq_exit_rcu+0x10/0xf8 kernel/softirq.c:696
[<ffffffff863c32b0>] handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:390
[<ffffffff863ed6fe>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:360