INFO: task kworker/u9:1:4153 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc1-syzkaller-g19272b37aa4f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u9:1    state:D stack:0     pid:4153  tgid:4153  ppid:2      task_flags:0x4208060 flags:0x00000000
Workqueue: events_unbound bpf_map_free_deferred
Call Trace:
[<ffffffff86388df4>] context_switch kernel/sched/core.c:5396 [inline]
[<ffffffff86388df4>] __schedule+0x1022/0x4094 kernel/sched/core.c:6785
[<ffffffff8638bf2a>] __schedule_loop kernel/sched/core.c:6863 [inline]
[<ffffffff8638bf2a>] schedule+0xc4/0x35e kernel/sched/core.c:6878
[<ffffffff863a0702>] schedule_timeout+0x1c6/0x2ae kernel/time/sleep_timeout.c:75
[<ffffffff8638dab2>] do_wait_for_common kernel/sched/completion.c:95 [inline]
[<ffffffff8638dab2>] __wait_for_common+0x1d2/0x3e8 kernel/sched/completion.c:116
[<ffffffff8638dce2>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff8638dce2>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:148
[<ffffffff80373490>] rcu_barrier+0x2dc/0x6cc kernel/rcu/tree.c:3850
[<ffffffff80713e5e>] dev_map_free+0x11c/0x6bc kernel/bpf/devmap.c:214
[<ffffffff805a4576>] bpf_map_free kernel/bpf/syscall.c:862 [inline]
[<ffffffff805a4576>] bpf_map_free_deferred+0x226/0x47a kernel/bpf/syscall.c:888
[<ffffffff801bb13c>] process_one_work+0x96a/0x1f32 kernel/workqueue.c:3238
[<ffffffff801be24c>] process_scheduled_works kernel/workqueue.c:3321 [inline]
[<ffffffff801be24c>] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3402
[<ffffffff801dba5c>] kthread+0x39c/0x7d4 kernel/kthread.c:464
[<ffffffff800696de>] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214
[<ffffffff863a6b02>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327

Showing all locks held in the system:
3 locks held by kworker/0:1/10:
2 locks held by kworker/1:0/24:
1 lock held by khungtaskd/36:
 #0: ffffffff883dc3a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766
3 locks held by kworker/u9:4/1031:
1 lock held by klogd/2988:
2 locks held by getty/3138:
 #0: ffffaf801cff30a0 (&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/3170:
2 locks held by kworker/1:3/3867:
2 locks held by kworker/1:4/3873:
3 locks held by kworker/u9:1/4153:
 #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3213
 #1: ffff8f800d067b70 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3213
 #2: ffffffff883ec5c0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x6cc kernel/rcu/tree.c:3782
2 locks held by kworker/1:5/4253:
2 locks held by kworker/u9:2/4489:
 #0: ffffaf806ed43118 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:606 [inline]
 #0: ffffaf806ed43118 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1532 [inline]
 #0: ffffaf806ed43118 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1856 [inline]
 #0: ffffaf806ed43118 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x304/0x4094 kernel/sched/core.c:6709
 #1: ffffaf806ed2e688 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x22a/0x718 kernel/sched/psi.c:987
2 locks held by kworker/1:7/4826:
2 locks held by kworker/1:10/4874:
1 lock held by syz.0.475/5036:
2 locks held by syz.1.474/5037:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller-g19272b37aa4f #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80078a80>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000327a>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff80061012>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80061012>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff800610a6>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff86340a50>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff86340d08>] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62
[<ffffffff800847ac>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:350
[<ffffffff804ea4a8>] trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
[<ffffffff804ea4a8>] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
[<ffffffff804ea4a8>] watchdog+0xcea/0x1618 kernel/hung_task.c:470
[<ffffffff801dba5c>] kthread+0x39c/0x7d4 kernel/kthread.c:464
[<ffffffff800696de>] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214
[<ffffffff863a6b02>] 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: 23 Comm: ksoftirqd/1 Not tainted 6.16.0-rc1-syzkaller-g19272b37aa4f #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
epc : __sanitizer_cov_trace_const_cmp4+0x0/0x24 kernel/kcov.c:313
 ra : ipt_do_table+0x2de/0x1c82 net/ipv4/netfilter/ip_tables.c:257
epc : ffffffff804e7ec0 ra : ffffffff8597a9c8 sp : ffff8f8000197200
 gp : ffffffff89c4eee0 tp : ffffaf80132ccec0 t0 : ffff8f8000197110
 t1 : fffff5ef02a7ab80 t2 : fffffffff2f20000 s0 : ffff8f80001974b0
 s1 : 0000000000000000 a0 : 0000000000000000 a1 : 0000000000000001
 a2 : 0000000000f00000 a3 : ffffffff8597a97e a4 : 0000000000000000
 a5 : 0000000000000001 a6 : 0000000000f00000 a7 : ffffaf80153d5c03
 s2 : 0000000000000001 s3 : ffffaf801dc5ef00 s4 : 1ffff1f000032e78
 s5 : ffffaf801bd67a00 s6 : ffff8f8000197610 s7 : 0000000000000002
 s8 : ffff8f8000197440 s9 : 0000000000000003 s10: ffff8f80001973e0
 s11: ffffaf8038a4eb00 t3 : 81987a7b00000000 t4 : fffff5ef02a7ab80
 t5 : fffff5ef02a7ab81 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff804e7ec0>] __sanitizer_cov_trace_const_cmp4+0x0/0x24 kernel/kcov.c:309
[<ffffffff8597ec8a>] iptable_mangle_hook+0x6c/0x44a net/ipv4/netfilter/iptable_mangle.c:80
[<ffffffff854a4250>] nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
[<ffffffff854a4250>] nf_hook_slow+0xb8/0x1ec net/netfilter/core.c:623
[<ffffffff856c95fa>] nf_hook include/linux/netfilter.h:272 [inline]
[<ffffffff856c95fa>] NF_HOOK include/linux/netfilter.h:315 [inline]
[<ffffffff856c95fa>] ip_rcv+0x20e/0x44e net/ipv4/ip_input.c:567
[<ffffffff85087e84>] __netif_receive_skb_one_core+0x106/0x16e net/core/dev.c:5977
[<ffffffff85088104>] __netif_receive_skb+0x2c/0x144 net/core/dev.c:6090
[<ffffffff85089304>] process_backlog+0x4f6/0x1cb0 net/core/dev.c:6442
[<ffffffff8508dc9e>] __napi_poll.constprop.0+0xaa/0x4ba net/core/dev.c:7414
[<ffffffff8508eb82>] napi_poll net/core/dev.c:7478 [inline]
[<ffffffff8508eb82>] net_rx_action+0xad4/0xefc net/core/dev.c:7605
[<ffffffff8015c6d2>] handle_softirqs+0x4b2/0x132e kernel/softirq.c:579
[<ffffffff8015d61c>] run_ksoftirqd kernel/softirq.c:968 [inline]
[<ffffffff8015d61c>] run_ksoftirqd+0xce/0x144 kernel/softirq.c:960
[<ffffffff801f1f6c>] smpboot_thread_fn+0x420/0xc80 kernel/smpboot.c:164
[<ffffffff801dba5c>] kthread+0x39c/0x7d4 kernel/kthread.c:464
[<ffffffff800696de>] ret_from_fork_kernel+0x2a/0xbb2 arch/riscv/kernel/process.c:214
[<ffffffff863a6b02>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:327