rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P3884
	(detected by 0, t=10502 jiffies, g=10761, q=802 ncpus=2)
task:syz.2.34        state:R  running task     stack:22840 pid:3884  ppid:3753   flags:0x0000400c
Call Trace:
 <IRQ>
 sched_show_task+0x4d5/0x670 kernel/sched/core.c:8945
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:261 [inline]
 print_other_cpu_stall+0x1299/0x1640 kernel/rcu/tree_stall.h:606
 check_cpu_stall kernel/rcu/tree_stall.h:778 [inline]
 rcu_pending kernel/rcu/tree.c:3890 [inline]
 rcu_sched_clock_irq+0xaf6/0x1200 kernel/rcu/tree.c:2393
 update_process_times+0x147/0x1b0 kernel/time/timer.c:1869
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1501
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x16c/0x1f0 kernel/softirq.c:403
Code: 8b e8 28 d3 50 09 65 66 8b 05 f0 7e af 7e 66 85 c0 75 57 bf 01 00 00 00 e8 81 42 0a 00 e8 ac 3d 3d 00 fb 65 8b 05 9c 4e ae 7e <85> c0 75 05 e8 4b 72 ac ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c
RSP: 0018:ffffc90000007560 EFLAGS: 00000286
RAX: 0000000000000101 RBX: 1ffff92000000eb0 RCX: ffffffff816ad9fa
RDX: dffffc0000000000 RSI: ffffffff8b0c0240 RDI: ffffffff8b5d5ba0
RBP: ffffc90000007610 R08: dffffc0000000000 R09: fffffbfff20e7246
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000000eb4 R14: ffffc900000075a0 R15: 0000000000000200
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 ip6t_do_table+0x1617/0x1830 net/ipv6/netfilter/ip6_tables.c:377
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:614
 nf_hook include/linux/netfilter.h:257 [inline]
 NF_HOOK+0x29a/0x450 include/linux/netfilter.h:300
 __netif_receive_skb_one_core net/core/dev.c:5528 [inline]
 __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5642
 process_backlog+0x381/0x760 net/core/dev.c:5970
 __napi_poll+0xc7/0x470 net/core/dev.c:6537
 napi_poll net/core/dev.c:6604 [inline]
 net_rx_action+0x70f/0xeb0 net/core/dev.c:6718
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:finish_task_switch+0x1d3/0x810 kernel/sched/core.c:5123
Code: 33 0b 00 48 83 c4 08 4c 89 f7 e8 68 31 00 00 0f 1f 44 00 00 4c 89 f7 e8 bb 02 50 09 e8 d6 25 32 00 fb 49 8d bc 24 f8 15 00 00 <48> 89 f8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc9000468f368 EFLAGS: 00010286
RAX: 0877903584cb9400 RBX: ffff8880167f0034 RCX: ffffffff816ad9fa
RDX: dffffc0000000000 RSI: ffffffff8b0c0240 RDI: ffff8880212233b8
RBP: ffffc9000468f3b0 R08: dffffc0000000000 R09: fffffbfff20e7246
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888021221dc0
R13: 1ffff110173076eb R14: ffff8880b983aa00 R15: ffff8880b983b758
 context_switch kernel/sched/core.c:5247 [inline]
 __schedule+0x1447/0x4570 kernel/sched/core.c:6561
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6873
 irqentry_exit+0x53/0x80 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:inet_twsk_purge+0x1da/0xa40
Code: 05 be 67 63 05 01 48 c7 c7 00 e9 0f 8c be 19 03 00 00 48 c7 c2 40 e9 0f 8c e8 b2 d2 48 f8 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 f7 e8 9c 2c c0 f8 4d 8b 3e 4c 89 fe 48 83 e6 01 31 ff
RSP: 0018:ffffc9000468f700 EFLAGS: 00000246
RAX: 1ffff1102975c01a RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc900160a0000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000468f830 R08: ffffffff8921f664 R09: fffffbfff20e7245
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920008d1efa
R13: dffffc0000000000 R14: ffff88814bae00d0 R15: ffffffff9238c1e0
 ops_exit_list net/core/net_namespace.c:177 [inline]
 setup_net+0x939/0xb90 net/core/net_namespace.c:358
 copy_net_ns+0x392/0x5d0 net/core/net_namespace.c:481
 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
 copy_namespaces+0x397/0x3f0 kernel/nsproxy.c:178
 copy_process+0x1ab8/0x4060 kernel/fork.c:2270
 kernel_clone+0x222/0x920 kernel/fork.c:2682
 __do_sys_clone kernel/fork.c:2823 [inline]
 __se_sys_clone kernel/fork.c:2807 [inline]
 __x64_sys_clone+0x231/0x280 kernel/fork.c:2807
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9908d773b9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9909b20ff8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f9908f05f80 RCX: 00007f9908d773b9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000067002280
RBP: 00007f9908de48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9908f05f80 R15: 00007ffd58801de8
 </TASK>