INFO: rcu_preempt self-detected stall on CPU 0-...: (1 GPs behind) idle=22b/140000000000001/0 softirq=9324/9332 fqs=12497 (t=12500 jiffies g=996 c=995 q=801) Task dump for CPU 0: syz-executor994 R running task 28432 3975 3938 0x0000000c 0000000000000f62 90a48b52b8005eeb ffff8801db206fe0 ffffffff8140c8fc ffff8801db21f4c0 0000000000000000 dffffc0000000000 ffffffff844bef00 ffffffff844bef84 ffff8801db207000 ffffffff8140cb87 ffffffff844bef48 Call Trace: [] sched_show_task+0x2cb/0x2d6 kernel/sched/core.c:5089 [] dump_cpu_task+0x79/0x7e kernel/sched/core.c:9046 [] rcu_dump_cpu_stacks+0x150/0x164 kernel/rcu/tree.c:1233 [] print_cpu_stall kernel/rcu/tree.c:1340 [inline] [] check_cpu_stall kernel/rcu/tree.c:1404 [inline] [] __rcu_pending kernel/rcu/tree.c:3892 [inline] [] rcu_pending kernel/rcu/tree.c:3956 [inline] [] rcu_check_callbacks.cold.75+0x5c3/0xd20 kernel/rcu/tree.c:2796 [] update_process_times+0x3a/0x70 kernel/time/timer.c:1427 [] tick_sched_handle.isra.15+0x55/0xf0 kernel/time/tick-sched.c:151 [] tick_sched_timer+0x72/0x120 kernel/time/tick-sched.c:1097 [] __run_hrtimer kernel/time/hrtimer.c:1261 [inline] [] __hrtimer_run_queues+0x3ad/0x1000 kernel/time/hrtimer.c:1325 [] hrtimer_interrupt+0x1b1/0x430 kernel/time/hrtimer.c:1359 [] local_apic_timer_interrupt+0x74/0xa0 arch/x86/kernel/apic/apic.c:901 [] smp_apic_timer_interrupt+0x7c/0xa0 arch/x86/kernel/apic/apic.c:925 [] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:741 [] _decode_session6+0xb72/0x14d0 net/ipv6/xfrm6_policy.c:160 [] __xfrm_decode_session+0x69/0x100 net/xfrm/xfrm_policy.c:2403 [] xfrm_decode_session_reverse include/net/xfrm.h:1114 [inline] [] icmpv6_route_lookup+0x2ce/0x440 net/ipv6/icmp.c:362 [] icmp6_send+0xee9/0x1b80 net/ipv6/icmp.c:507 [] icmpv6_send+0xb1/0x1b0 net/ipv6/ip6_icmp.c:42 [] ip6_pkt_drop+0x16d/0x430 net/ipv6/route.c:2472 [] ip6_pkt_discard+0x1c/0x20 net/ipv6/route.c:2479 [] dst_input include/net/dst.h:504 [inline] [] ip6_rcv_finish+0x13d/0x640 net/ipv6/ip6_input.c:62 [] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline] [] NF_HOOK include/linux/netfilter.h:249 [inline] [] ipv6_rcv+0x10cb/0x1cd0 net/ipv6/ip6_input.c:186 [] __netif_receive_skb_core+0x12d6/0x2940 net/core/dev.c:4019 [] __netif_receive_skb+0x5b/0x1b0 net/core/dev.c:4054 [] process_backlog+0x216/0x6a0 net/core/dev.c:4647 [] napi_poll net/core/dev.c:4885 [inline] [] net_rx_action+0x3a2/0xdb0 net/core/dev.c:4950 [] __do_softirq+0x22c/0xa1a kernel/softirq.c:273 [] do_softirq_own_stack+0x1c/0x30 arch/x86/entry/entry_64.S:929 [] do_softirq.part.16+0x54/0x60 kernel/softirq.c:317 [] do_softirq+0x19/0x20 kernel/softirq.c:320 [] netif_rx_ni+0xec/0x3a0 net/core/dev.c:3653 [] tun_get_user+0xbe7/0x2410 drivers/net/tun.c:1264 [] tun_chr_write_iter+0xd5/0x190 drivers/net/tun.c:1283 [] new_sync_write fs/read_write.c:478 [inline] [] __vfs_write+0x30d/0x3f0 fs/read_write.c:491 [] vfs_write+0x191/0x4e0 fs/read_write.c:538 [] SYSC_write fs/read_write.c:585 [inline] [] SyS_write+0xd9/0x1c0 fs/read_write.c:577 [] entry_SYSCALL_64_fastpath+0x22/0x9e