INFO: task kworker/u9:1:3525 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:kworker/u9:1    state:D stack:0     pid:3525  tgid:3525  ppid:2      task_flags:0x4208060 flags:0x00000000
Workqueue: events_unbound bpf_map_free_deferred
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
[<ffffffff8074bd1e>] dev_map_free+0x11c/0x6bc kernel/bpf/devmap.c:214
[<ffffffff805d641a>] bpf_map_free kernel/bpf/syscall.c:862 [inline]
[<ffffffff805d641a>] bpf_map_free_deferred+0x226/0x47a kernel/bpf/syscall.c:888
[<ffffffff801bd390>] process_one_work+0x96a/0x1f32 kernel/workqueue.c:3238
[<ffffffff801c04a0>] process_scheduled_works kernel/workqueue.c:3321 [inline]
[<ffffffff801c04a0>] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3402
[<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

Showing all locks held in the system:
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
4 locks held by kworker/1:2/926:
1 lock held by klogd/3006:
2 locks held by getty/3155:
 #0: ffffaf80133e40a0 (&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/3182:
2 locks held by kworker/1:1/3189:
3 locks held by kworker/u9:1/3525:
 #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3213
 #1: ffff8f80062d7b70 ((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
2 locks held by kworker/1:5/3912:
3 locks held by kworker/0:0/4348:
2 locks held by kworker/1:0/4597:
3 locks held by kworker/u9:7/5852:
2 locks held by kworker/1:7/5857:
2 locks held by kworker/1:9/5889:
2 locks held by kworker/1:10/5915:
2 locks held by kworker/1:12/5935:
2 locks held by kworker/1:13/5950:
2 locks held by kworker/1:16/6018:
2 locks held by kworker/1:17/6041:
2 locks held by syz.2.720/6153:
2 locks held by syz.0.721/6154:

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

NMI backtrace for cpu 0
CPU: 0 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
[<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: 5860 Comm: kworker/1:8 Not tainted 6.16.0-rc1-syzkaller-gfda589c28604 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: wg-crypt-wg1 wg_packet_decrypt_worker
epc : __cookie_v4_init_sequence+0x92/0x2e4 net/ipv4/syncookies.c:161
 ra : __cookie_v4_init_sequence+0x92/0x2e4 net/ipv4/syncookies.c:161
epc : ffffffff859e0d1e ra : ffffffff859e0d1e sp : ffff8f8000017020
 gp : ffffffff89c83ca0 tp : ffffaf801c584ec0 t0 : ffffaf8031062560
 t1 : fffff5ef0620c4ac t2 : fffffffff2f20000 s0 : ffff8f8000017070
 s1 : ffffaf801e71c114 a0 : 0000000000000003 a1 : 000000000000059f
 a2 : 0000000000f00000 a3 : ffffffff859e0d1e a4 : 0000000000000000
 a5 : ffffaf801c584ec0 a6 : 0000000000f00000 a7 : ffffaf8031062563
 s2 : 0000000000000000 s3 : ffff8f80000170e0 s4 : ffffaf801e71c100
 s5 : 0000000000000000 s6 : ffffaf801e71c100 s7 : ffffaf8031062500
 s8 : ffff8f8000017120 s9 : ffffaf8031062514 s10: 1ffff1f000002e18
 s11: 1ffff1f000002e40 t3 : 19ab921c00000000 t4 : fffff5ef0620c4ac
 t5 : fffff5ef0620c4ad t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff859e0d1e>] __cookie_v4_init_sequence+0x92/0x2e4 net/ipv4/syncookies.c:161
[<ffffffff855f887c>] synproxy_send_client_synack+0x3fc/0x8be net/netfilter/nf_synproxy_core.c:472
[<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