IPVS: set_ctl: invalid protocol: 175 255.255.255.255:20001
INFO: task syz-executor3:11304 blocked for more than 120 seconds.
      Not tainted 4.18.0-rc3+ #104
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3   D21816 11304   4486 0x80000006
Call Trace:
 context_switch kernel/sched/core.c:2862 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3504
 schedule+0xfb/0x450 kernel/sched/core.c:3548
 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1777
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x430/0x8d0 kernel/sched/completion.c:136
 __wait_rcu_gp+0x257/0x350 kernel/rcu/update.c:366
 synchronize_sched.part.64+0x104/0x120 kernel/rcu/tree.c:3097
 synchronize_sched+0x76/0xf0 kernel/rcu/tree.c:3098
 synchronize_rcu include/linux/rcupdate.h:94 [inline]
 namespace_unlock+0x1bb/0x210 fs/namespace.c:1424
 drop_collected_mounts+0x85/0x90 fs/namespace.c:1848
 put_mnt_ns+0x69/0x90 fs/namespace.c:3297
 free_nsproxy+0x46/0x220 kernel/nsproxy.c:176
 switch_task_namespaces+0xb8/0xd0 kernel/nsproxy.c:229
 exit_task_namespaces+0x17/0x20 kernel/nsproxy.c:234
 do_exit+0x1b03/0x2750 kernel/exit.c:864
 do_group_exit+0x177/0x440 kernel/exit.c:968
 get_signal+0x88e/0x1970 kernel/signal.c:2468
 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x2e0/0x370 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455ab9
Code: e0 1f 48 89 04 24 e8 b6 6f fd ff e8 81 6a fd ff e8 5c 68 fd ff 48 8d 05 14 65 48 00 48 89 04 24 48 c7 44 24 08 1d 00 00 00 e8 <13> 5e fd ff 0f 0b e8 8c 44 00 00 e9 07 f0 ff ff cc cc cc cc cc cc 
RSP: 002b:00007f8aa4e16c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: 0000000000000000 RBX: 00007f8aa4e176d4 RCX: 0000000000455ab9
RDX: 000000000000000a RSI: 0000000000000000 RDI: 0000000000000013
RBP: 000000000072bf48 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000020000040 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c1766 R14: 00000000004d1e38 R15: 0000000000000001
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 899 Comm: khungtaskd Not tainted 4.18.0-rc3+ #104
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.5+0x19/0xce lib/nmi_backtrace.c:103
 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline]
 watchdog+0x9c4/0xf80 kernel/hung_task.c:252
 kthread+0x345/0x410 kernel/kthread.c:240
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54