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

[  757.882665] INFO: rcu_preempt self-detected stall on CPU
[  757.888422] 	0-...: (1 GPs behind) idle=c37/140000000000001/0 softirq=7357/7358 fqs=12499 
[  757.896793] 	 (t=12500 jiffies g=1208 c=1207 q=83)
[  757.901825] Task dump for CPU 0:
[  757.905161] syz-executor0   R  running task    28096  4312   3955 0x2002000c
[  757.912583]  0000000000000f73 f9a9a8cb61184120 ffff8801db206ff0 ffffffff8140c8fc
[  757.920592]  ffff8801db21f4c0 0000000000000000 dffffc0000000000 ffffffff844bef00
[  757.928622]  ffffffff844bef84 ffff8801db207010 ffffffff8140cb87 ffffffff844bef48
[  757.936617] Call Trace:
[  757.939184]  <IRQ>  [<ffffffff8140c8fc>] sched_show_task+0x2cb/0x2d6
[  757.945782]  [<ffffffff8140cb87>] dump_cpu_task+0x79/0x7e
[  757.951308]  [<ffffffff8141704d>] rcu_dump_cpu_stacks+0x150/0x164
[  757.957513]  [<ffffffff81417c4a>] rcu_check_callbacks.cold.75+0x5c3/0xd20
[  757.970200]  [<ffffffff8129a7da>] update_process_times+0x3a/0x70
[  757.976320]  [<ffffffff812c5195>] tick_sched_handle.isra.15+0x55/0xf0
[  757.982881]  [<ffffffff812c5822>] tick_sched_timer+0x72/0x120
[  757.994948]  [<ffffffff8129dd4d>] __hrtimer_run_queues+0x3ad/0x1000
[  758.025989]  [<ffffffff8129f4c1>] hrtimer_interrupt+0x1b1/0x430
[  758.032028]  [<ffffffff810ad284>] local_apic_timer_interrupt+0x74/0xa0
[  758.038752]  [<ffffffff838c534c>] smp_apic_timer_interrupt+0x7c/0xa0
[  758.045218]  [<ffffffff838c4290>] apic_timer_interrupt+0xa0/0xb0
[  758.063861]  [<ffffffff833c9b39>] __xfrm_decode_session+0x69/0x100
[  758.070171]  [<ffffffff834a3d9e>] icmpv6_route_lookup+0x2ce/0x440
[  758.088109]  [<ffffffff834a5b99>] icmp6_send+0xee9/0x1b80
[  758.152555]  [<ffffffff8355b491>] icmpv6_send+0xb1/0x1b0
[  758.164964]  [<ffffffff8346309d>] ip6_pkt_drop+0x16d/0x430
[  758.170569]  [<ffffffff8346337c>] ip6_pkt_discard+0x1c/0x20
[  758.176265]  [<ffffffff834360bd>] ip6_rcv_finish+0x13d/0x640
[  758.187979]  [<ffffffff83438bdb>] ipv6_rcv+0x10cb/0x1cd0
[  758.217187]  [<ffffffff82f7eb06>] __netif_receive_skb_core+0x12d6/0x2940
[  758.237196]  [<ffffffff82f801cb>] __netif_receive_skb+0x5b/0x1b0
[  758.243331]  [<ffffffff82f84756>] process_backlog+0x216/0x6a0
[  758.255225]  [<ffffffff82f81592>] net_rx_action+0x3a2/0xdb0
[  758.274043]  [<ffffffff838c5bec>] __do_softirq+0x22c/0xa1a
[  758.286381]  [<ffffffff838c399c>] do_softirq_own_stack+0x1c/0x30
[  758.292494]  <EOI>  [<ffffffff8113d9d4>] do_softirq.part.16+0x54/0x60
[  758.299190]  [<ffffffff8113f6c9>] do_softirq+0x19/0x20
[  758.304442]  [<ffffffff82f7caac>] netif_rx_ni+0xec/0x3a0
[  758.309892]  [<ffffffff82753187>] tun_get_user+0xbe7/0x2410
[  758.326886]  [<ffffffff82754bc5>] tun_chr_write_iter+0xd5/0x190
[  758.332918]  [<ffffffff8151ce0d>] __vfs_write+0x30d/0x3f0
[  758.380578]  [<ffffffff8151e9f1>] vfs_write+0x191/0x4e0
[  758.385913]  [<ffffffff81520ff9>] SyS_write+0xd9/0x1c0
[  758.414182]  [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0
[  758.420301]  [<ffffffff838c406a>] sysenter_flags_fixed+0xd/0x17
