IPVS: set_ctl: invalid protocol: 255 172.20.20.170:20002
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=a0a/1/0x4000000000000004 softirq=13415/13418 fqs=5216 
rcu: 	 (t=10500 jiffies g=8877 q=2689)
NMI backtrace for cpu 1
CPU: 1 PID: 8243 Comm: syz-executor.0 Not tainted 4.19.72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x189/0x1d5 kernel/rcu/tree.c:1340
 print_cpu_stall kernel/rcu/tree.c:1478 [inline]
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0x5e3/0xd90 kernel/rcu/tree.c:2682
 update_process_times+0x32/0x80 kernel/time/timer.c:1636
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274
 __run_hrtimer kernel/time/hrtimer.c:1398 [inline]
 __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x50 kernel/kcov.c:100
Code: 66 ea ff 48 c7 05 44 22 cd 08 00 00 00 00 e9 ca e9 ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 48 8b 75 08 <65> 48 8b 04 25 40 ee 01 00 65 8b 15 28 97 96 7e 81 e2 00 01 1f 00
RSP: 0018:ffff8880ae907558 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000503 RBX: ffff88808ada3df8 RCX: ffffffff858e78e9
RDX: 0000000000000000 RSI: ffffffff858e7d4c RDI: 0000000000000005
RBP: ffff8880ae907558 R08: ffff888033c3e400 R09: 0000000000000007
R10: ffff888033c3ed98 R11: 000000004c92f779 R12: dffffc0000000000
R13: ffff88808ada3b40 R14: ffff88808ada3e90 R15: 0000000000000000
 hhf_dequeue+0x51c/0xa00 net/sched/sch_hhf.c:434
 dequeue_skb net/sched/sch_generic.c:277 [inline]
 qdisc_restart net/sched/sch_generic.c:380 [inline]
 __qdisc_run+0x1e7/0x1960 net/sched/sch_generic.c:398
 __dev_xmit_skb net/core/dev.c:3501 [inline]
 __dev_queue_xmit+0x165c/0x2fe0 net/core/dev.c:3811
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876
 neigh_hh_output include/net/neighbour.h:491 [inline]
 neigh_output include/net/neighbour.h:499 [inline]
 ip6_finish_output2+0x12fd/0x2550 net/ipv6/ip6_output.c:120
 ip6_finish_output+0x574/0xbe0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:447 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ndisc_send_skb+0xf3b/0x1460 net/ipv6/ndisc.c:491
 ndisc_send_rs+0x134/0x6d0 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x30f/0x680 net/ipv6/addrconf.c:3821
 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1682 [inline]
 __run_timers kernel/time/timer.c:1650 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1695
 __do_softirq+0x25c/0x921 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 kernel/locking/spinlock.c:192
Code: c0 18 46 72 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 4d 5b 7e 01 00 74 20 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 92 47 55 fa 65 8b 05 eb 02 0e 79 85 c0 74 06 41
RSP: 0018:ffff888033c47168 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff10e48c3 RBX: ffff888033c3e400 RCX: 1ffff11006787d94
RDX: dffffc0000000000 RSI: ffff888033c3eca8 RDI: ffff888033c3ec7c
RBP: ffff888033c47170 R08: ffff888033c3e400 R09: ffff888033c3eca0
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae92d240
R13: ffff8880a674c380 R14: 0000000000000000 R15: 0000000000000001
 finish_lock_switch kernel/sched/core.c:2576 [inline]
 finish_task_switch+0x146/0x780 kernel/sched/core.c:2676
 context_switch kernel/sched/core.c:2829 [inline]
 __schedule+0x86e/0x1dc0 kernel/sched/core.c:3474
 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:3701
 retint_kernel+0x1b/0x2d
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:628 [inline]
RIP: 0010:audit_filter+0x93f/0xbb0 kernel/auditfilter.c:1319
Code: 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 75 02 00 00 4d 8b 3f 4c 39 bd 50 ff ff ff 0f 85 29 f8 ff ff e9 51 ff ff ff <e8> 9c f3 01 00 e8 37 31 f0 ff 31 ff 89 c3 89 c6 e8 cc f4 01 00 84
RSP: 0018:ffff888033c47398 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffffffff81695a82
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff888033c47480 R08: ffff888033c3e400 R09: 0000000000000001
R10: ffff888033c3eca8 R11: 00000000f593af4a R12: 0000000000000001
R13: 1ffff11006788ec1 R14: 0000000000000000 R15: 00000000006000c0
 audit_log_start+0xd7/0x7a0 kernel/audit.c:1754
 integrity_audit_msg+0xff/0x480 security/integrity/integrity_audit.c:41
 ima_add_violation+0x187/0x1f0 security/integrity/ima/ima_api.c:154
 ima_rdwr_violation_check security/integrity/ima/ima_main.c:119 [inline]
 process_measurement+0xb3e/0x1560 security/integrity/ima/ima_main.c:214
 ima_file_check+0xc5/0x110 security/integrity/ima/ima_main.c:391
 do_last fs/namei.c:3422 [inline]
 path_openat+0x1130/0x45e0 fs/namei.c:3534
 do_filp_open+0x1a1/0x280 fs/namei.c:3564
 do_sys_open+0x3fe/0x550 fs/open.c:1088
 __do_sys_open fs/open.c:1106 [inline]
 __se_sys_open fs/open.c:1101 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1101
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4598e9
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1e48ef9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004598e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1e48efa6d4
R13: 00000000004c6004 R14: 00000000004dad28 R15: 00000000ffffffff