TITLE: INFO: rcu detected stall in ipv6_rcv
TYPE: HANG

[  842.597024] INFO: rcu_sched self-detected stall on CPU
[  842.602466] 	0-....: (1 GPs behind) idle=222/1/4611686018427387906 softirq=196202/196203 fqs=31202 
[  842.611869] 	 (t=125000 jiffies g=95129 c=95128 q=2548)
[  842.617218] NMI backtrace for cpu 0
[  842.620820] CPU: 0 PID: 6823 Comm: syz-executor6 Not tainted 4.16.0+ #288
[  842.627718] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  842.637043] Call Trace:
[  842.639601]  <IRQ>
[  842.641730]  dump_stack+0x1a7/0x27d
[  842.662780]  nmi_cpu_backtrace+0x1e0/0x220
[  842.671464]  nmi_trigger_cpumask_backtrace+0x123/0x180
[  842.676716]  arch_trigger_cpumask_backtrace+0x14/0x20
[  842.681881]  rcu_dump_cpu_stacks+0x186/0x1d3
[  842.686271]  check_cpu_stall.isra.63+0xbb8/0x15b0
[  842.762673]  rcu_check_callbacks+0x21b/0xae0
[  842.815807]  update_process_times+0x30/0x60
[  842.820105]  tick_sched_handle+0x85/0x160
[  842.824229]  tick_sched_timer+0x42/0x120
[  842.828264]  __hrtimer_run_queues+0x39c/0xec0
[  842.874887]  hrtimer_interrupt+0x2a5/0x6f0
[  842.879110]  smp_apic_timer_interrupt+0x14a/0x700
[  842.914536]  apic_timer_interrupt+0xf/0x20
[  842.918740]  </IRQ>
[  842.920956] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50
[  842.926292] RSP: 0018:ffff8801aabde340 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff12
[  842.933978] RAX: 0000000000000007 RBX: ffff8801c81331c0 RCX: 000000000000fde1
[  842.941221] RDX: 0000000000000000 RSI: 0000000000004699 RDI: ffff8801c8133244
[  842.948465] RBP: ffff8801aabde3d0 R08: 0000000000000000 R09: ffff8801aabde6a8
[  842.955718] R10: 000000000000000b R11: ffffed003557bcdf R12: 000000000000fde1
[  842.962962] R13: ffff8801aabde6a8 R14: 00000000000046c8 R15: dffffc0000000000
[  842.979432]  __xfrm_decode_session+0x68/0x110
[  842.983904]  __xfrm_policy_check+0x19e/0x2300
[  843.040856]  ip6_input_finish+0x1288/0x17b0
[  843.068947]  ip6_input+0xdb/0x560
[  843.089410]  ip6_mc_input+0x3a8/0xb10
[  843.096979]  ip6_rcv_finish+0x297/0x8c0
[  843.121561]  ipv6_rcv+0xf45/0x1fc0
[  843.145285]  __netif_receive_skb_core+0x1a52/0x3480
[  843.236444]  __netif_receive_skb+0x2c/0x1b0
[  843.245211]  netif_receive_skb_internal+0x10b/0x670
[  843.266287]  netif_receive_skb+0xae/0x390
[  843.288664]  tun_rx_batched.isra.50+0x5ee/0x870
[  843.306989]  tun_get_user+0x299b/0x3b50
[  843.363324]  tun_chr_write_iter+0xb9/0x160
[  843.367536]  do_iter_readv_writev+0x55c/0x830
[  843.380795]  do_iter_write+0x154/0x540
[  843.392735]  compat_writev+0x225/0x420
[  843.420428]  do_compat_writev+0x115/0x220
[  843.440528]  compat_SyS_writev+0x26/0x30
[  843.448867]  do_fast_syscall_32+0x3ec/0xf9f
[  843.486226]  entry_SYSENTER_compat+0x70/0x7f
[  843.490607] RIP: 0023:0xf7ff2c99
[  843.493944] RSP: 002b:00000000f5fee044 EFLAGS: 00000292 ORIG_RAX: 0000000000000092
[  843.501630] RAX: ffffffffffffffda RBX: 00000000000000fc RCX: 00000000f5fee094
[  843.508882] RDX: 0000000000000001 RSI: 000000000813af00 RDI: 00000000ffffffff
[  843.516133] RBP: 00000000f5fee158 R08: 0000000000000000 R09: 0000000000000000
[  843.523377] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[  843.530621] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000